Roofing Glossary

Welcome to R. Myers Roofing and thank you for visiting! Below are some definitions of terms used in our roofing business. Click on any term to expand the view to include a definition, *items will also have an image. Click anywhere on the definition again to roll it back up!

3

  • *3-Tab Shingles:
    • Asphalt shingles are by far the most prolific roofing material used in residential construction today. Virtually 80 percent of all residential roofing materials are manufactured by asphalt roofing product companies. The industry has come a long way since its beginning in 1893. Today’s asphalt shingle products are far superior to products made just 25 years ago.

A

  • ANC:
    • America’s Natural Colors®. A vibrant color series in the Heritage® shingle line.
  • *APA:
    • American Plywood Association. Tests and sets standards for all varieties of plywoods used in the U.S.
  • APP-modified:
    • A process that bonds atactic polypropylene to asphalt, enhancing its tensile strength and providing better elongation and recovery characteristics than nonmodified asphalt. Also see TAMKO APP.
  • AR:
    • A suffix used in TAMKO shingle product names, denoting algae relief.
  • ARMA:
    • Asphalt Roofing Manufacturer’s Association Organization of roofing manufacturers.
  • ASTM:
    • American Society for Testing and Materials. A voluntary organization concerned with development of consensus standards, testing procedures and specifications.
  • Aggregate:
    • Crushed rock used as a top layer in some flat-roof applications.
  • Algae discoloration:
    • A type of roof discoloration caused by algae. Commonly called fungus growth.
  • Algae:
    • Microorganisms that may grow to colonies in damp environments, including certain rooftops. They can discolor shingles. Often described as “fungus.”
  • American method:
    • Application of giant individual shingles with the long dimension parallel to the rake. Shingles are applied with a 3/4-inch space between adjacent shingles in a course.
  • *Architectural Shingles:
    • Architectural shingles are also known as laminated or dimensional shingles. They are among the highest quality roofing products because they are heavier, without requiring additional support under the roof. They are used by homeowners, usually of large houses, who like a distinctive look to their roofs. Their weight and design give a three-dimensional appearance. Some are nailed on in the usual way, while others in addition to nails, have interlocking tabs. The heaviest are rated to withstand winds up to 120 mph, heavy hail and other impact. The interlocking models hold together extremely well. They are also highly fire resistant especially if they have a heavy granulated top coat. Those with fiberglass or rubberized asphalt are rated the highest for fire and weather. Product shown is Antique Slate from Tamko with a 30-year warranty.
  • Asbestos:
    • The name given to certain inorganic minerals when they occur in fibrous form. Though fire resistant, its extremely fine fibers are easily inhaled, and exposure to them over a period of years has been linked to cancers of the lung or lung-cavity lining and to asbestosis, a severe lung impairment. Has never been used in TAMKO products.
  • Asphalt concrete primer:
    • Asphalt-based primer used to prepare concrete and metal for asphalt sealant.
  • Asphalt plastic cement:
    • An asphalt-based cement used to bond roofing materials. Also known as flashing cement or mastic.
  • Asphalt:
    • A bituminous material used in roofing materials because of its waterproofing ability.
  • Awaplan:
    • America’s first polyester-based SBS-modified roll roofing product, introduced in 1977 by TAMKO.

B

  • BUR:
    • Industry abbreviation for built-up roof.
  • Back surfacing:
    • Fine mineral matter applied to the back side of shingles or rolls to keep them from sticking.
  • Balanced system:
    • A ventilation system where 50% of the required ventilating area is provided by vents located in the upper portion of the roof with the balance provided by undereave or soffit vents.
  • Base flashing:
    • The portion of flashing attached to or resting on the deck to direct the flow of water onto the roof covering.
  • Base sheet:
    • Bottom layer of a modified or built-up roofing system.
  • Base-N-Ply®:
    • Roll roofing product consisting of a TAMKO fiberglass mat coated on both sides with lightly SBS-modified aphalt. Used as a base ply in select Series 100, 200 and 700 Specifications and as an alternate for TAMKO Glass-Base or Type 43 Coated Base Sheet in any TAMKO specification. Hot-asphalt applied or mechanically fastened. A registered TAMKO trademark brand name.
  • Below-grade:
    • Below ground level.
  • Bitumen:
    • Term commonly applied to various mixtures of naturally occurring solid or liquid hydrocarbons, excluding coal. These substances are described as bituminous. Asphalt is a bitumen.
  • Black Belt:
    • Full-time Six Sigma practitioner.
  • Blistering:
    • Bubbles or pimples in roofing materials. Usually moisture related. In shingles, blisters are caused either from moisture under the material or moisture trapped inside the material.
  • Blisters:
    • Bubbles that may appear on the surface of asphalt roofing after installation.
  • Blow-offs:
    • When shingles are subjected to high winds and are forced off a roof deck.
  • *Box Vent:
    • A box shaped roof vent installed in openings in the attic and properly positioned to take advantage of natural air flow to draw hot summer or moist winter air out and replace it with fresh outside air.
  • Brands:
    • Airborne burning embers released from a fire.
  • Bridging:
    • A method of reroofing with metric-sized shingles.
  • Buckling:
    • When a wrinkle or ripple affects shingles or their underlayments.
  • Built-up roof:
    • A type of commercial, or “flat,” roof finish produced by applying alternate layers of roofing felt and hot asphalt or pitch. The top layer is given a hot flood coat of the bitumen; granules of rock, gravel, slag or ceramic particles may be embedded while the flood coat is still hot. The roofing system may incorporate rigid insulation.
  • Bundle:
    • A package of shingles. There are three, four or five bundles per square.
  • Butt edge:
    • The lower edge of shingle tabs.

C

  • CPA:
    • Industry abbreviation for cold-process adhesive.
  • CRRC:
    • Cool Roof Rating Council.
  • Cap flashing:
    • The portion of flashing attached to a vertical surface to prevent water from migrating behind the base flashing.
  • Cap sheet:
    • A top layer in a built-up or modified roofing system.
  • Caulk:
    • To fill a joint with mastic or asphalt plastic cement to prevent leaks.
  • Cement:
    • See Asphalt plastic roofing cement.
  • Chalk line:
    • A line made on the roof by snapping a taut string or cord dusted with chalk. Used for alignment purposes.
  • *Chimney Cap:
    • A chimney cover or an animal guard is something that mounts over the top of the flue. It helps to keep both rain and animals out. A stainless steel chimney cover will not rust. A cap also usually has some sort of screen to prevent birds and animals out as it keeps the rain out, without stopping the flow of air and smoke.
  • Class “A”:
    • The highest fire-resistance rating for roofing as per ASTM E-108. Indicates roofing is able to withstand severe exposure to fire originating from sources outside the building.
  • Class “B”:
    • Fire-resistance rating that indicates roofing materials are able to withstand moderate exposure to fire originating from sources outside the building.
  • Class “C”:
    • Fire-resistance rating that indicates roofing materials are able to withstand light exposure to fire originating from sources outside the building.
  • Closed cut valley:
    • A method of valley treatment in which shingles from one side of the valley extend across the valley, while shingles from the other side are trimmed 2 inches from the valley centerline. The valley flashing is not exposed.
  • Co-extrusion:
    • A composite manufacturing process in which composite materials are layered and extruded together through dies so that the multiple materials merge and weld together into a single finished product.
  • Coal tar:
    • A viscous liquid mixture of hydrocarbon compounds derived, along with coke, from the destructive distillation of coal.
  • Coating:
    • A layer of viscous asphalt applied to the base material into which granules or other surfacing is embedded. Also a general term describing multiple products used as a final surfacing in the form of an aluminum or white elastomeric reflective surface coat.
  • Cold process adhesive:
    • Mastic prepared with SBS modifiers to adhere laps, flashings and joints of built-up or low-slope roofing without hot-mopping or torching equipment, or the primary adesive used to adhere the roofing membrane in a cold-applied roofing system.
  • Cold-method and lap cement:
    • Special multipurpose adhesive for low-sloped, cold-applied roof construction. Bonds 19-inch selvedge, mineral surface and cap sheets to the underlayment. Doubles as an adhesive on 2-inch selvedge lap of mineral-, granule- or smooth-surfaced roofing. Available both in summer and winter grades.
  • Collar:
    • Pre-formed flange placed over a vent pipe to seal the roof around the vent pipe opening. Also called a vent sleeve.
  • Composite Decking:
    • Decking material made with a balanced mixture of plastic and wood fiber. Composite decking is low maintenance and inherently resistant to warping, rotting, splitting, splintering and insect infestation.
  • Composite Railing:
    • Railing material made with a balanced mixture of plastic and wood fiber. Composite railing is low maintenance and inherently resistant to warping, rotting, splitting, splintering and insect infestation.
  • Composite Roofing:
    • Roofing shingles made with a mixture of plastic and minerals. The shingles are injection molded into various forms such as slate or shake shingle profiles.
  • Compression-molded:
    • A composite decking manufacturing process in which the composite material is pressed into molds to form finished decking component profiles.
  • Concealed nail method:
    • Application of roll roofing in which all nails are driven into the underlying course of roofing and covered by a cemented, overlapping course. Nails are not exposed to the weather.
  • Condensation:
    • The change of water from vapor to liquid when warm, moisture-laden air comes in contact with a cold surface.
  • Continuous Improvement:
    • A method for success by continually improving a company’s processes, products and people (see also Deming and Shewhart).
  • Cool Colors:
    • Engery-efficient roofing system colors that have been rated by the Cool Roof Rating Council.
  • CoolRidge®:
    • A self-contained four foot sectional shingle over ridge vent designed to help remove heat and warm moist air out of the attic, providing 18 square inches of net free area per linear foot. CoolRidge® features both an internal and external “sinewave” shaped baffle to help prevent wind-driven rain and snow infiltration. A registered TAMKO trademark brand name.
  • Coping joint:
    • The intersection of a roof slope and an exterior vertical wall.
  • *Counter Step Flashing:
    • That portion of the flashing attached to a vertical surface to prevent water from migrating behind the step flashing. It’s placed overlapping the step shingles. See also Step Flashing.
  • Course:
    • A row of shingles or roll roofing running the length of the roof.
  • Coverage:
    • Amount of weather protection provided by the roofing material. Depends on number of layers of material between the exposed surface of the roofing and the deck; i.e., single coverage, double coverage, etc.
  • Cricket:
    • A saddle-shaped, peaked construction connecting a sloping roof plane with a chimney. Designed to encourage water drainage away from the chimney joint.
  • Cupping:
    • When shingles are improperly installed over an existing roof or are overexposed, they form a curl or cup.
  • Curb roof:
    • A roof with an upper and lower set of rafters on each side, the under set being less inclined to the horizon than the upper; a mansard roof.
  • Curb:
    • The short elevation of an exterior wall above the deck of a commercial flat roof.
  • Cutout:
    • The open portions of a strip shingle between the tabs.

D

  • Damper:
    • An adjustable plate for controlling draft.
  • Deck:
    • The surface installed over the supporting framing members to which the roofing is applied.
  • Deming:
    • Dr. W. Edwards Deming, a mid-twentieth century statistician who developed a management system that contains 14 points designed to reduce process variation resulting in improved quality, improved productivity, decreased costs and increased profitability.
  • Designer Railing:
    • TAMKO’s premium composite railing product designed to complement EverGrain® decking applications. Available in 6-foot straight rail and stair rail kits, as well as baluster kits; offered in four Classic Colors.
  • Dormer:
    • A framed window unit projecting through the sloping plane of a roof.
  • Double coverage:
    • Application of asphalt roofing so that the lapped portion is at least 2 inches wider than the exposed portion, resulting in two layers of roofing material over the deck.
  • Downspout:
    • A pipe for draining water from roof gutters. Also called a leader.
  • *Drip edge:
    • A non-corrosive, non-staining material used along the eaves and rakes to allow water run-off to drip clear of underlying construction. Water can easily penetrate roofs at the bottom and side edges of roofs. This is especially true when rain is accompanied by wind. Drip edges are corrosion resistant metal which protects the wood roof decking from this water. They usually project a minimum of 3 inches onto the deck. The metal at the edge of the roof decking is then bent down a minimum of 1 inch onto the rake trim and gutter boards. See also Metal Roofing Edge.
  • Dutch lap method:
    • Application of giant individual shingles with the long dimension parallel to the eaves. Shingles are applied to overlap adjacent shingles in each course as well as the course below.

E

  • Eaves flashing:
    • Additional layer of roofing material applied at the eaves to help prevent damage from water backup.
  • Eaves:
    • The horizontal, lower edge of a sloped roof.
  • Edging strips:
    • Boards nailed along eaves and rakes to provide secure edges for reroofing with asphalt shingles after cutting back existing wood shingles.
  • Elastomeric Roof Coating:
    • A white coating consisting of a polymeric binder and ultraviolet and infrared reflective pigments and other additives to help provide protection of roof membranes for longer roof cycles and to provide reflectivity of solar radiation to help reduce energy consumption by lowering air conditioning costs (e.g., TAM-STAR, TAM-GUARD).
  • Elements®:
    • Extruded composite dockboard manufactured by TAMKO. A registered TAMKO trademark brand name.
  • Elite Glass-Seal®:
    • 3-tab self-sealing fiberglass shingles with a traditional square-tab design. Heavier asphalt coating and wind/U.L. Class A fire resistance afford roofs greater protection. Backed by a 25-year limited warranty. Algae-relief granules optional. A registered TAMKO trademark brand name.
  • Ell:
    • An extension of a building at right angles to its length.
  • End-laps:
    • When installing rolled products in roofing, the area where a roll ends on a roof and is overlapped by the next section of rolled material.
  • EverGrain®:
    • Compression molded composite decking manufactured by TAMKO. Available in five Classic colors and four Envision colors, all with a deep, lasting grain. A registered TAMKO trademark brand name.
  • Expansion joint:
    • A joint that allows for expansion and contraction during temperature changes.
  • Exposed nail method:
    • Application of roll roofing in which all nails are driven into the cemented, overlapping course of roofing. Nails are exposed to the weather.
  • Exposure I grade plywood:
    • Type of plywood approved by the American Plywood Association for exterior use.
  • Exposure:
    • The portion of the roofing exposed to the weather after installation.
  • Extrusion:
    • A composite manufacturing process in which composite material is pressed, or extruded, through dies so that the material takes the shape of the finished product.

F

  • FHA:
    • The Federal Housing Authority. Sets construction standards throughout the U.S.
  • FM:
    • Factory Mutual Research Corp.
  • Feathering strips:
    • Tapered wood filler strips placed along the butt edges of old wood shingles to create a level surface when reroofing over existing wood shingle roofs. Also called “horsefeathers.”
  • *Felt:
    • Fibrous material saturated with asphalt and used as an underlayment or sheathing paper. R. Myers Roofing uses 15# and 30# Tamko underlayments.
  • Fiber glass mat:
    • An asphalt roofing base material manufactured from glass fibers.
  • Fibered aluminum roof coating:
    • High-performance metallic reflective barrier for prepared roofing, metal surfaces and exterior masonry. Reflects sun’s harmful rays, reduces energy costs in summer and winter while prolonging surface life.
  • Fibered roof coating:
    • Optimal protection for low-sloped roofs. This thick, high-quality coating seals fine cracks and openings. Renews and rejuvenates old composition roofing and prolongs roof life. Also performs well on metal or concrete surfaces.
  • Fiberglass mat:
    • An asphalt roofing base material manufactured from glass fibers.
  • Flange:
    • Metal pan extending up or down a roof slope around flashing pieces. Usually at chimneys and plumbing vents.
  • Flashing cement:
    • Sealant designed for use around flashing areas, typically thicker than plastic cement.
  • *Flashing:
    • Sheet metal or roll roofing pieces fitted to the joint of any roof intersection, penetration or projection (chimneys, copings, dormers, valleys, vent pipes, etc.) in order to prevent water leakage. Layering flashing in a shingle-fashion is a critical part of the process. Because wind-driven rain will stop at nothing to infiltrate the home, you have to plan for weather to win out at times and for water to get past the wall’s siding system. The flashing underneath the housewrap acts as a second barrier, so any water that gets past the siding is diverted back onto the roof, where it can flow down and away from the home. A rubber pipe flashing is shown here.
  • *Flue Cap:
    • A chimney cover or an animal guard is something that mounts over the top of the flue. It helps to keep both rain and animals out. A stainless steel chimney cover will not rust. A cap also usually has some sort of screen to prevent birds and animals out as it keeps the rain out, without stopping the flow of air and smoke.
  • Foundation coating:
    • High-quality below-grade moisture protection. Used for below-grade exterior concrete and masonry wall dampproofing to seal out moisture and prevent corrosion.
  • Free-tab shingles:
    • Shingles that do not contain factory-applied strips or spots of self-sealing adhesive.

G

  • Gable roof:
    • A type of roof with sloping planes of the same pitch on each side of the ridge, with a gable at each end.
  • Gable:
    • The upper portion of a sidewall that comes to a triangular point at the ridge of a sloping roof.
  • Gambrel roof:
    • A type of roof with a gable on either end, but with two sloping roof planes of different angles on either side, the lower of which is steeper than the upper. A common “barn roof” or mansard roof.
  • Granules:
    • Crushed rock coated with ceramic material and applied to the exposed surface of asphalt roofing products to add color and reduce ultraviolet degradation. Copper compounds added to these help make them algae relief.
  • Green Belt:
    • Part-time Six Sigma practitioner.
  • Gutter:
    • The trough that channels water from the eaves to the downspouts.

H

  • HEX shingles:
    • Shingles that have the appearance of a hexagon after installation.
  • Hand-sealing:
    • The method to assure sealing of shingles on very steep slopes in high wind areas and when installing in cold weather.
  • Head lap:
    • Shortest distance from the butt edge of an overlapping shingle to the upper edge of a shingle in the second course below. The triple coverage portion of the top lap of strip shingles.
  • Heritage® Series Shingles:
    • Rustic laminated fiberglass self-sealing shingles that offer the look of attractive wood shakes without wood’s high cost and liabilities. Designed for long life and top performance. Classic and contemporary colors complement any architectural style or building material. Available with 30- and 50- year limited warranty protection. Algae-relief granules optional. A registered TAMKO trademark brand name.
  • Hex shingles:
    • Shingles that have the appearance of a hexagon after installation.
  • Hip legs:
    • The down-slope ridges on hip roofs.
  • Hip roof:
    • A type of roof formed by sloping roof planes on all four sides, without gables.
  • Hip shingles:
    • Shingles used to cover the inclined external angle formed by the intersection of two sloping roof planes.
  • Hip:
    • The inclined external angle formed by the intersection of two sloping roof planes. Runs from the ridge to the eaves.
  • Horsefeathers:
    • See feathering strips.
  • Hylar 5000®:
    • A crystalline high molecular weight powder form of polyvinylidene fluoride specifically designed for solvent-based coatings to provide improved gloss. It forms mechanically strong and tough films that have a broad useful temperature range.

I

  • *Ice Dam:
    • Condition formed at the lower roof edge by the thawing and re-freezing of melted snow on the overhang. Can force water up and under shingles, causing leaks.
  • Interlocking shingles:
    • Individual shingles that mechanically fasten to each other to provide wind resistance.
  • Isotropic:
    • Describes materials or objects whose properties are the same in all directions (e.g., elasticity).

K

  • Kynar 500®:
    • A fluoropolymer (polyvinylidene fluoride) that is used by coating formulators as a base vehicle in coating for aluminum, galvanized steel and aluminized steel.

L

  • Laminated shingles:
    • Shingles that have added dimensionality because of extra layers or tabs, giving a shake like appearance. May also be called “architectural shingles” or “three-dimensional shingles.” Also see Heritage® Series shingles.
  • Lap cement:
    • An asphalt-based cement used to adhere overlapping plies of roll roofing.
  • Lap:
    • To cover the surface of one shingle or roll with another.
  • *Lead Pipe Flashing:
    • Sheet metal or roll roofing pieces fitted to the joint of protruding pipes in order to prevent water leakage.
  • Louver:
    • A slanted opening for ventilation.
  • Low-slope application:
    • Method of installing shingles on roof slopes between 2 and 4 inches per foot.

M

  • MSDS:
    • A Material Safety Data Sheet (MSDS) describes the hazards of a material and provides information on how the material can be safely handled, used and stored.
  • Mansard application:
    • Method of installing shingles on roof slopes greater than 21 inches per foot. See TAMKO’s Installation Instructions for complete details.
  • Mansard roof:
    • A type of roof containing two sloping planes of different pitch on each of four sides. The lower plane has a much steeper pitch than the upper, often approaching vertical. Contains no gables.
  • Masonry primer:
    • An asphalt-based primer used to prepare masonry surfaces for bonding with other asphalt products.
  • Mastic:
    • See asphalt plastic roofing cement.
  • Mats:
    • The general term for the base material or reinforcement of shingles and certain rolled products.
  • MetalWorks®:
    • TAMKO’s line of steel shingles that feature a galvanized steel panel with a Kynar/Hylar painted finish. Available in Slate, Shake, and Tile shingle profiles and a variety of colors. A registered TAMKO trademark brand name. See tamko.com for product details.
  • *Metal Roofing Edge:
    • Metal roofing edge has gained popularity over conventional ways of edging due to the various advantages it brings. It is lightweight, easy to install and fireproof. It is also far more durable than the other forms of edges. And, if properly installed, metal roofing edge could practically last as long as the house, thus providing savings on maintenance costs. It helps to save on energy bills too. Its highly-reflective coating deflects sunlight in summer, reducing air conditioning costs. And, in winter, it reflects the heat inside, keeping the rooms of the house warmer.
  • Mineral stabilizers:
    • Finely ground limestone, slate, traprock or other inert materials added to asphalt coatings for durability and increased resistance to fire and weathering.
  • Mineral-surfaced roofing:
    • Asphalt shingles and roll roofing that are covered with granules.
  • Mobile home aluminum roof coating:
    • Durable one-coat application that prolongs the life of mobile home roofs while providing a decorative surface. Also reflects sun’s rays to reduce energy costs.
  • Modified bitumen roof:
    • A roof covering that is typically composed of a factory-fabricated copolymer-modified bitumen composite sheet, often reinforced with polyester and/or fiberglass and installed in one or more plies. Commonly surfaced with field-applied coatings, factory-applied granules or metal foil. May incorporate rigid insulation. Also see AWAPLAN or AWAFLEX®.
  • *Moisture Guard Plus®:
    • A self-adhering modified bitumen roll roofing product used as a moisture barrier that can protect an entire roof deck from water backup of ice damming or wind-blown rain. Also used to protect roof’s most vulnerable areas, including hips, rake edges, valleys, ridges, low-sloped areas and around skylights, dormers, vents, doors and windows. Offers low-temperature flexibility for ease of application. A registered TAMKO trademark brand name.

N

  • NFA:
    • Venting products are normally rated with a Net Free Area (NFA). NFA is the open area that exists for air to pass through. The key to effective venting is to balance the NFA of soffit and ridge vents. Ideally the NFA of the soffit should be equal to or greater than that of the ridge vent. Also see Vent or Ventilation.
  • NRCA:
    • The National Roofing Contractors Association. Respected national organization of roofing contractors.
  • Nail-pop:
    • When a nail is not fully driven, or backs up to sit up off the roof deck.
  • Natural ventilation:
    • A ventilation system utilizing ventilators installed in openings in the attic and properly positioned to take advantage of natural air flow to draw hot summer or moist winter air out and replace it with fresh outside air.
  • Nesting:
    • A method of reroofing with new asphalt shingles over old shingles in which the top edge of the new shingle is butted against the bottom edge of the existing shingle tab.
  • Net free area:
    • Area unobstructed by screens, louvers or other materials.
  • No-cutout shingles:
    • Shingles consisting of a single, solid tab with no cutouts.
  • Non-veneer panel:
    • Any wood based panel that does not contain veneer and carries an APA span rating, such as wafer board or oriented strand board.
  • Nonfibered aluminum roof coating:
    • Thin but efficient reflective barrier to reflect sun’s harmful rays and prolong surface life. Also works on metal surfaces.
  • Nonfibered roof and foundation coating:
    • Dual-purposed thin-viscosity material that doubles as a nonfibered roof or foundation coating.
  • Nonfibered roof coating:
    • An easily applied thin coating that gives added protection to low-sloped roofs as well as metal and masonry surfaces. Steel or wooden fences and underground pipe may also be treated.
  • Nonveneer panel:
    • Any wood-based panel that does not contain veneer and carries an APA span rating, such as wafer board or oriented strand board.
  • Normal slope application:
    • Method of installing asphalt shingles on roof slopes between 4 inches and 21 inches per foot.

O

  • Open valley:
    • Method of valley construction in which shingles on both sides of the valley are trimmed along a chalk line snapped on each side of the valley. Shingles do not extend across the valley. Valley flashing is exposed.
  • Organic felt:
    • An asphalt roofing base material manufactured from cellulose fibers.
  • Overdriven:
    • The term used for fasteners driven through roofing material with too much force, breaking the material.
  • Overexposed:
    • Installing shingle courses higher than their intended exposure.
  • Overhang:
    • The portion of the roof structure that extends beyond the exterior walls of a building.

P

  • Pallets:
    • Wooden platforms used for storing and shipping bundles of shingles.
  • Parapet:
    • A wall placed at the edge of a roof, especially a flat roof, to help prevent people from falling off.
  • Pitch pan or pitch pocket:
    • A container, usually formed of sheet metal, around supporting connections with roof-mounted machinery. Filling the container with pitch, or better yet, plastic roof cement, helps seal out water even when vibration is present.
  • Pitch:
    • The degree of roof incline expressed as the ratio of the rise (in feet) to the span (in feet). Also, a thick, oily substance commonly obtained from tar and used to seal out water at joints and seams. Produced from distilling coal tar, wood tar or petroleum.
  • Plastic Cement:
    • A compound used to seal flashings and in some cases to seal down shingles as well as for other small waterproofing jobs. Where plastic cement is required for sealing down shingles, use a dab about the size of a quarter unless otherwise specified.
  • Plastic roof cement:
    • Specially formulated heavy-bodied material that provides ultimate protection for tough jobs. Used as a waterproofing medium in new construction and as a general-purpose exterior repair and maintenance material. Stops roof and other leaks fast. Available both in summer and winter grades.
  • Plumbing vents:
    • Term used to describe plumbing pipes that project through a roof pane. Also called vent stacks.
  • Ply sheet:
    • A layer in built-up roofing.
  • Ply:
    • The number of layers of roofing — i.e. one-ply, two-ply.
  • *Power Vent:
    • Power ventilators have electric powered fans attached to a pot vent. Often these are thermostatically controlled to turn on when the attic temperature reaches a certain temperature. They turn off automatically when the attic has cooled to a preset temperature on the thermostat. See all R. Myers recommended ventilation systems here.
  • Prevailing wind:
    • The most common direction of wind for a particular region.

Q

  • Quick-setting cement:
    • An asphalt-based cement used to adhere tabs of strip shingles to the course below. Also used to adhere roll roofing laps applied by the concealed nail method.

R

  • Racking:
    • Roofing application method in which shingle courses are applied vertically up the roof rather than across and up. Not a recommended procedure.
  • Rafter:
    • The supporting framing member immediately beneath the deck, sloping from the ridge to the wall plate.
  • Rake edge:
    • The overhang of an inclined roof plane beyond the vertical wall below it.
  • Rake:
    • The inclined edge of a sloped roof over a wall from the eave to the ridge.
  • Random-tab shingles:
    • Shingles on which tabs vary in size and exposure.
  • Release tape:
    • A plastic or paper strip that is applied to the back or front of self-sealing shingles. Prevents the shingles from sticking together in the bundles, and need not be removed for application.
  • Ridge Shingles:
    • Shingles used to cover the horizontal external angle formed by the intersection of two sloping roof planes.
  • *Ridge Ventilation:
    • A ventilation system installed at the ridge, providing an air outlet to help cool the underside of the roof deck when installed together with soffit vents. After the soffit has been vented, the air must have a place to leave the attic. This is best achieved by installing a continuous ridge vent along the highest points of the roof. This type of venting can also be installed along roof hips. It is important to install as much of this ridge and hip (where applicable) ventilation as possible. This ventilation material combined with the soffit ventilation strips provides an effective flow-thru ventilation system. See all R. Myers recommended ventilation systems here.
  • Ridge:
    • The uppermost, horizontal external angle formed by the intersection of two sloping roof planes.
  • Rise:
    • The vertical distance from the eaves line to the ridge.
  • Roll roofing:
    • Asphalt roofing products manufactured in roll form.
  • Roof deck:
    • The surface, installed over the supporting framing members, to which the roofing is applied.
  • Roof louvers:
    • Rooftop rectangular-shaped roof vents. Also called box vents, mushroom vents, airhawks, soldier vents.
  • Roof plane:
    • A roofing area defined by having four separate edges. One side of a gable, hip or mansard roof.
  • Roofing membrane:
    • The layer or layers of waterproofing products that cover the roof deck. Also referred to as the “cap sheet.”
  • Roofing tape:
    • An asphalt-saturated tape used with asphalt cements for flashing and patching asphalt roofing.
  • Run:
    • The horizontal distance from the eaves to a point directly under the ridge. One half the span.

S

  • SBS-modified:
    • Asphalt that has been combined with SBS (styrene-butadiene-styrene) polymers to increase its elasticity. Also referred to as “rubberized asphalt.”
  • Saturant:
    • Asphalt used to impregnate a felt-based material.
  • Saturated felt:
    • An asphalt-impregnated felt used as an underlayment between the deck and the roofing material.
  • Scupper:
    • An opening for drainage in a wall, curb or parapet.
  • Self-sealing cement:
    • A thermal-sealing tab cement built into the shingle to firmly cement the shingles together automatically after they have been applied properly and exposed to warm sun temperatures. In warm seasons, the seal will be complete in a matter of days. In colder seasons, sealing time depends on the temperature and amount of direct sunlight hitting the shingles. Hand sealing with plastic cement should be done to ensure sealing in winter.
  • Self-sealing shingles:
    • Shingles containing factory-applied strips or spots of self-sealing adhesive.
  • Self-sealing strip or spot:
    • Factory-applied adhesive that bonds shingle courses together when exposed to the heat of the sun after application.
  • Selvage (selvedge):
    • The portion of roll roofing overlapped by the succeeding course to obtain double coverage.
  • Shading:
    • Slight differences in shingle color that may occur as a result of normal manufacturing operations.
  • Shadowtone:
    • A band or area of slightly darker colored granules used to create an artificial shadow line to create more dimension and beauty in appearance.
  • Sheathing:
    • Exterior grade boards used as a roof deck material.
  • Shed roof:
    • A roof containing only one sloping plane and having no hips, ridges, valleys or gables.
  • *Shingles:
    • R. Myers Roofing offers two basic types of shingles to suit the needs of every home. 25-year 3-Tab shingles lay flat on the roof with no apparent overlap, while Architectural shingles are designed to have a more 3-dimensional look, and are warranted for 30 years. See the individual shingle types in our glossary for more details of each style.
  • Side-laps:
    • The area on rolled material where one roll overlaps the rolled material beneath it. Also called selvage edge on roll roofing.
  • Single coverage:
    • Asphalt roofing that provides one layer of roofing material over the deck.
  • Six Sigma:
    • A business strategy and management philosophy for the urgent pursuit of perfection to achieve increased profitability by continually refining and improving business and manufacturing processes.
  • Slope:
    • The incline angle of a roof surface, given as a ratio of the rise (in inches) to the run (in feet).
  • Smooth-surfaced roofing:
    • Roll roofing that is covered with ground talc or mica instead of granules (coated).
  • Soffit ventilation:
    • Intake ventilation installed under the eaves or at the roof edge.
  • Soffit:
    • The finished underside of the eaves. Virtually, every house has a soffit. This soffit creates an overhang at the edge of a roof. Because of the manner in which roofs are framed, these soffit areas are perfect entry points for air to enter attic spaces.
  • Soil stack:
    • A vent pipe that penetrates the roof.
  • Span:
    • The horizontal distance from eaves to eaves.
  • Specialty eaves flashing membrane:
    • A self-adhering, waterproofing shingle underlayment designed to protect against water infiltration due to ice dams or wind driven rain.
  • Square-tab shingles:
    • Shingles on which tabs are all the same size and exposure.
  • Square:
    • A unit of roof measure covering 100 square feet.
  • Starter strip:
    • Asphalt roofing applied at the eaves that provides protection by filling in the spaces under the cutouts and joints of the first course of shingles.
  • Steep slope application:
    • Method of installing asphalt shingles on roof slopes greater than 21 inches per foot.
  • *Step flashing:
    • Step flashing is used where a sloping roof plane meets a vertical wall, chimney, dormer, etc. so that wind and water that may seep to through the intersection will flow back out onto the roof instead of leaking inside. It’s placed under the shingles and flush against the vertical surface. See also Counter Step Flashing.
  • StoneCrest® Slate:
    • The slate shingle profile in the MetalWorks® steel shingle line. A registered TAMKO trademark brand name.
  • StoneCrest® Tile:
    • The tile shingle profile in the MetalWorks® steel shingle line. A registered TAMKO trademark brand name.
  • Strip shingles:
    • Asphalt shingles that are approximately three times as long as they are wide.

T

  • TAMKO APP:
    • Polyester-based APP-modified roll roofing product with smooth or granulated surface. Polyester reinforcement provides greater flexibility and puncture resistance than fiberglass-based products. U.L. classified for exterior fire exposure. Torch applied.
  • TAMKO Glass-Base®:
    • Roll roofing product built on a fiberglass base sheet constructed with a heavyweight TAMKO fiberglass mat coated with weathering-grade asphalt. Used as a base sheet in select TAMKO modified asphalt and fiberglass roofing systems and as an alternate for TAMKO Type 43 Coated Base Sheet in any TAMKO specification. Hot-asphalt applied or mechanically fastened. A registered TAMKO trademark brand name.
  • TAMKO Glass-Seal®:
    • 3-tab self-sealing fiberglass shingles with a traditional square-tab design. A thick layer of weathering-grade asphalt gives them extra waterproofing protection. U.L. Class A fire rated and backed by a 20-year limited warranty. Algae-relief granules optional. A registered TAMKO trademark brand name.
  • TAMKO Shingle Starter:
    • A precut universal starter course shingle with a factory-applied sealant.
  • TAMKO TWH-1 Protection Course:
    • A premium-quality protection course constructed with a heavyweight TAMKO organic mat that is coated on both sides with weathering-grade asphalt and then surfaced with mineral granules for superior scuff and abrasion resistance. Protects the waterproofing membrane of plaza decks, roof terrace decks, parking decks, etc.
  • TARC:
    • A TAMKO Approved Roofing Contractor approved to install TAMKO-guaranteed commercial roofing systems.
  • TW-60:
    • Below-grade waterproofing roll product. A flexible, self-adhering rubberized asphalt sheet membrane with a heavy polymer film on the surface, a removable “zip strip” on the sides and a removable treated release sheet on the adhesive side. 60-mil thick. Applies vertically or horizontally.
  • TWM-1 Mastic:
    • A high-quality trowel-grade rubberized bitumen mastic that dries to a durable but pliable seal, allowing minor expansion and contraction. Seals seams, overlaps, patches and terminations of TAMKO waterproofing roll products.
  • TWP-1 Primer:
    • A high-quality SBS-modified solvent-based primer formulated for the professional waterproofing contractor. Provides maximum bond to asphalt, concrete, masonry and metal surfaces.
  • TWP-2 Water-Based Primer:
    • A high-quality rubberized water-based primer formulated for the professional waterproofing contractor. Provides maximum bond to asphalt, concrete, masonry, ICF and metal surfaces.
  • Tab:
    • The exposed portion of strip shingles defined by cutouts.
  • Talc:
    • See back surfacing.
  • Tam-Cap®:
    • Roll roofing product; a mineral-surfaced fiberglass cap sheet constructed with a TAMKO fiberglass mat coated with weathering-grade asphalt and surfaced with ceramic granules. Used in Specifications 244, 502, 507, 512, 602, 607 and 612. Hot-asphalt applied. A registered TAMKO trademark brand name.
  • Tam-Glass® Premium:
    • A high-performance fiberglass ply sheet consisting of a TAMKO heavyweight fiberglass mat coated with weathering-grade asphalt. Demonstrates excellent isotropic tensile strength. System tensile strength is far greater than current NBS performance criteria. Used as a base ply or reinforcing ply sheet for select Series 100, 200 and 1000 Specifications, and reinforcing ply sheet in Series 500 Specifications. Hot-asphalt applied. A registered TAMKO trademark brand name.
  • Tam-Ply IV®:
    • A high-performance fiberglass ply sheet consisting of a TAMKO fiberglass mat coated with weathering-grade asphalt. Product and system tensile strength exceed current ASTM and NBS recommendations. Used as a base ply or reinforcing ply sheet for select Series 100, 200 and 1000 Specifications, and reinforcing ply sheet in Series 600 Specifications. Hot-asphalt applied. A registered TAMKO trademark brand name.
  • Tam-Pro® Asphalt Primer:
    • A low-viscosity asphalt-based material made with select penetrating oils and fast-setting petroleum solvents. Provides maximum bond to asphalt, concrete, masonry and metal surfaces. Used as a bonding agent between the surface and asphaltic cements/coatings designed for roofing/waterproofing applications. Adheres to porous and nonporous surfaces to maximize bonding. Not for use with coal tar-based materials. Brush or spray applied. A registered TAMKO trademark brand name.
  • Tam-Pro® CPA Premium MB SBS Flashing Cement:
    • Cold-process adhesive. A tough, specially formulated SBS-modified bitumen asphaltic flashing cement. Produced from select petroleum materials and polymer modifiers. Used on SBS-modified bitumen membrane and built-up roofing flashing applications. Helps prevent, seal or stop leaks around various flashing areas in follow-up maintenance and repair procedures. Applied with a caulking gun and trowel or knife. A registered TAMKO trademark brand name.
  • Tam-Pro® CPA Premium SBS Adhesive:
    • Cold-process adhesive. A proprietary formulation consisting of select roofer’s flux asphalt, prime quick-setting VOC-compliant petroleum solvents, reinforcing minifibers and SBS-modified polymers blended to a brush-/squeegee-grade consistency. Used to adhere SBS-modified bitumen membrane to the substrate, typically a coated fiberglass base sheet. Applied with stiff-bristle brush or notched squeegee. A registered TAMKO trademark brand name.
  • Tam-Pro® CPA Premium SBS Flashing Cement:
    • Cold-process adhesive. A heavy-bodied SBS-polymer-modified trowel-grade asphaltic cement. Combines selected refined asphalt, prime solvents, wet-surface additives, SBS-modified polymers and extra-strength interlocking fibers into a smooth thixotropic high-performance material. Used for adhering SBS-modified bitumen membrane flashings and laps. May also be used for fiberglass built-up roofing system flashing applications. Trowel or knife applied. A registered TAMKO trademark brand name.
  • Tam-Pro® Cold-Application Cement:
    • A semimastic brushing-grade material consisting of pliable asphalt, quick-drying petroleum solvents and tough fibers. Also known as blind-nailing cement or SIS cement. Used as an adhesive between plies of 19-inch selvedge, smooth- or mineral-surfaced roll roofing and laps for cold-applied built-up roofing applications. Brush applied. A registered TAMKO trademark brand name.
  • Tam-Pro® Fibered Aluminum Roof Coating:
    • A superior protective coating made with high-quality asphalts, petroleum solvents, tough fibers and top-grade aluminum pigments. Forms a highly reflective surface upon application. Used for coating asphalt built-up roofing, modified bitumen membranes, flashings, other bitumen-based materials and metal surfaces. Applied with brush or roofer’s brush. A registered TAMKO trademark brand name.
  • Tam-Pro® Fibered Emulsion Coating:
    • A versatile protective coating consisting of a precise blend of select clay, asphalt, sized fibers and water. Used for additional weathering protection for asphalt roofing systems or properly prepared metal roofs. Also a surface preparation for the application of aluminum roof coatings as well as dampproofing of concrete and masonry surfaces. Applied with roofer’s brush or spray equipment. A registered TAMKO trademark brand name.
  • Tam-Pro® Fibered Roof Coating:
    • A semimastic material blended with select asphalt, mineral stabilizers, petroleum solvents and special fibers. Used on all types of low-sloped roof surfaces (with the exception of coal tar-based materials). Also used on metal, concrete and masonry surfaces. Provides additional weathering protection for membrane surfaces. Increases life expectancy of existing roofs or new roofs after suitable weathering. Applied with roofer’s brush or spray equipment. A registered TAMKO trademark brand name.
  • Tam-Pro® Fire-Rated (FR) Fibered Aluminum Roof Coating:
    • A superior flame-retardant protective coating. Combines select asphalts, petroleum solvents, tough fibers and top-grade aluminum pigments to form a highly reflective surface upon application. Used for coating asphalt built-up roofing, modified bitumen membranes, flashing or other bitumen-based materials. Applied with brush or airless spray equipment. A registered TAMKO trademark brand name.
  • Tam-Pro® Heavy-Bodied Flashing Cement:
    • A heavy-bodied all-weather trowel-grade mastic that contains select asphalts, petroleum solvents, tough reinforcing fibers and special additives that enhance spreadability. Used for flashing construction and other detail roofing work, such as tie-offs or shingle securement. Provides superior waterproofing properties for temporary repairs, or more permanent repairs when used with glass reinforcement. Trowel or knife applied. A registered TAMKO trademark brand name.
  • Tam-Pro® Nonfibered Aluminum Roof Coating:
    • A durable protective material consisting of high-quality asphalts and petroleum solvents with top-grade aluminum pigments. Forms a highly reflective surface upon application. Used for covering prepared roofing, metal buildings, tanks, bins, grain elevators, exterior masonry and mobile home roofs. It reduces inside summer temperatures by up to 15F by reflecting the sun’s rays. Provides an attractive surface that protects and prolongs surface life. Applied with brush, roofer’s brush, paint roller or spray equipment. A registered TAMKO trademark brand name.
  • Tam-Pro® Plastic Roof Cement:
    • A versatile roofing mastic that contains a precise blend of select asphalts, petroleum solvents, tough reinforcing fibers and special additives to enhance spreadability. Used in flashing construction and other detail roofing work, such as tie-offs, shingle securement, pitch pans, etc. Provides superior waterproofing properties for temporary repairs, or more permanent repairs when used with glass reinforcement. Trowel or knife applied. A registered TAMKO trademark brand name.
  • Tam-Pro® Q-15 Elastomeric Flashing Cement:
    • A heavy-bodied rubberized mastic cement that is specially designed to remain pliable without running. Blended from durable roofing asphalts, select petroleum solvents and tough interlocking fibers for vital thixotropic properties. 100% asbestos free. Used for vertical and horizontal asphalt roofing flashing systems and waterproofing detail work, such as parapets and drains. Trowel or knife applied. A registered TAMKO trademark brand name.
  • Tam-Pro® Wet- or Dry-Surface Plastic Roof Cement:
    • An all-weather roofing mastic containing special modifiers to enhance bonding to damp surfaces. Made with select asphalts, petroleum solvents, tough reinforcing fibers and wetting agents that dry to form a durable but pliable seal, allowing for minor expansion and contraction. Used in flashing construction and other detail roofing work, such as tie-offs or shingle securement. Provides superior waterproofing properties for temporary repairs, or more permanent repairs when used with glass reinforcement. Trowel or knife applied. A registered TAMKO trademark brand name.
  • Tam-Rail® Railing System:
    • A patented triple-layer railing system that offers incredible performance and protection. The system features thick walls, outstanding stiffness, and superior rigidity, all in a product that is light in weight and low in maintenance. A registered TAMKO trademark brand name.
  • Tam-Seal Roof Patch Sealant Cartridge:
    • Ideal for securing shingles and those small repair jobs. A maintenance and repair medium for preventing, sealing or stopping leaks. Elastic.
  • Tear-off:
    • Removal of existing shingles down to the roof deck.
  • Telegraphing:
    • A shingle distortion that may arise when a new roof is applied over an uneven surface.
  • Thixotropic:
    • Exhibiting thixotropy, the property of becoming fluid when shaken, stirred or otherwise disturbed, and setting again when allowed to stand.
  • Three-dimensional shingles:
    • See laminated shingles.
  • Three-tab shingle:
    • The most popular type of asphalt shingle usually 12″ x 36″ in size with three tabs.
  • Top lap:
    • That portion of the roofing covered by the succeeding course after installation.
  • Traditional 2 x 4 Railing:
    • TAMKO’s composite railing products that feature extruded two-sided grain 2 x 4 hand rail, 2 x 4 side rails, square balusters and injection-molded post ring and post cap. Designed for traditional installations to complement EverGrain® decking applications.
  • Transitions:
    • When a roof plane ties into another roof plane that has a different pitch or slope.
  • Trowel-Grade Foundation Coating:
    • Extra-thick protection is obtained from this fibered trowel-grade water-resistant material. Seals out moisture and prevents corrosion on below-grade concrete and masonry.
  • *Turbine Vent:
    • Aluminum turbines are hardworking devices that Mother Nature operates. Each time the slightest breeze blows, they do a great job of pulling air from the attic space. A turbine vent is a passive ventilation device. The popular ridge and soffit ventilation systems and the traditional metal pot vents are also passive ventilation systems. Aluminum turbine vents will not rust, and if ball bearing mechanisms are sealed (permanently lubricated), they will remian silent for decades. See all R. Myers recommended ventilation systems here.
  • Type 43 Coated Base Sheet:
    • Roll roofing product; a premium-quality organic base sheet constructed with a heavyweight TAMKO organic felt mat coated with weathering-grade asphalt. Demonstrates high tensile strength and excellent resistance to tears and nail pull-through. Used as a nailed base ply in TAMKO built-up, Awaplan Premium/Awaplan 170 and AwaFlex® nailable specifications. Also serves as a good vapor retarder when set in hot asphalt or between insulation layers. Hot-asphalt applied or mechanically fastened.

U

  • UL:
    • Underwriters Laboratories, a private independent research firm located in the United States, that attempts to classify and determine the safety of various materials and products.
  • UL label:
    • Label displayed on packaging to indicate the level of fire and/or wind resistance of asphalt roofing.
  • Ultraviolet degradation:
    • A reduction in certain performance limits caused by exposure to ultraviolet light.
  • Underdriven:
    • A reduction in certain performance limits caused by exposure to ultraviolet light.
  • Undereave:
    • Underside area of the overhang at the eave of the roof.
  • *Underlayment:
    • A secondary roofing layer that is waterproof (e.g., Moisture Guard Plus) or water-resistant (e.g., saturated felt), installed on the roof deck and beneath shingles or other roof-finishing layer.

V

  • VOC-compliant:
    • Conforming to standards for Volatile Organic Compounds.
  • Valley:
    • The inward angle formed by two intersecting sloping roof planes. Since it naturally becomes a water channel, additional attention to waterproofing is desirable.
  • Vapor retarder:
    • Any material used to prevent the passage of water vapor. Material which, when installed on the high vapor pressure (warm in winter) side of a material, retards the passage of moisture vapor to the lower pressure (cold in winter) side. Note exception – Florida and Gulf Coast. Check local building codes to determine what side the vapor retarder should be placed.
  • Vapor-Chan®:
    • Roll roofing product built on a heavyweight venting base sheet constructed with a TAMKO fiberglass mat coated with weathering-grade asphalt. The bottom surface is embedded with mineral granules and embossed with a brick/stone pattern. Used to relieve vapor pressure over lightweight insulating concrete or gypsum decks. Also specified in Awaplan Premium and Awaplan 170 systems installed over existing roofing systems. Hot-asphalt applied or mechanically fastened. A registered TAMKO trademark brand name.
  • Vapor:
    • Term used to describe moisture-laden air.
  • Vent sleeve:
    • See collar.
  • Vent:
    • Any outlet for air that protrudes through the roof deck, such as a pipe or stack. Any device installed on the roof, gable or soffit for the purpose of ventilating the underside of the roof deck.
  • Ventilation:
    • The term used in roofing for the passage of air from an enclosed space. See all R. Myers recommended ventilation systems here.
  • Ventilators:
    • Devices that eject stale air and circulates fresh air (i.e., ridge, roof, gable, undereave, foundation or rafter vents and vented soffit panels.)
  • Versa-Base®:
    • Roll roofing product consisting of a TAMKO fiberglass mat coated on both sides with SBS-modified asphalt. Used as a base ply in select Series 100, 200 and 700 Specifications and as an alternate for TAMKO Glass-Base or Type 43 Coated Base Sheet in any TAMKO specification. Also serves as a good vapor retarder when set in hot asphalt or between layers of insulation. Hot-asphalt applied or mechanically fastened. A registered TAMKO trademark brand name.
  • Versa-Cap® FR:
    • Roll roofing product consisting of a TAMKO fiberglass mat coated on both sides with SBS-modified asphalt. Used as a base ply in select Series 100, 200 and 700 Specifications and as an alternate for TAMKO Glass-Base or Type 43 Coated Base Sheet in any TAMKO specification. Also serves as a good vapor retarder when set in hot asphalt or between layers of insulation. Hot-asphalt applied or mechanically fastened. A registered TAMKO trademark brand name.
  • Viscosity:
    • The tack or “stickiness” of a fluid; its resistance to flow.

W

  • *Wall Flashing:
    • Additional layer of roofing material applied where the roof meets a wall, to help prevent water and wind damage.
  • Warm Wall:
    • The finished wall inside a structure, used in roofing to determine how to install waterproof underlayments at eaves.
  • Waterproof underlayments:
    • Modified bitumen-based roofing underlayments. Designed to seal to wood decks and waterproof critical leak areas.
  • Wet- or dry-surface plastic roof cement:
    • Superior performance in cold and wet applications. Performs as a general-purpose exterior repair and maintenance material on damp or dry surfaces. Stops roof and other leaks fast.
  • Window wrap:
    • A self-adhesive waterproof tape designed to help prevent air and water infiltration around windows and doors. (e.g., TW Moisture Wrap; TW Flash-N-Wrap® 25)
  • Woven Valley:
    • Method of valley construction in which shingles from both sides of the valley extend across the valley and are woven together by overlapping alternate courses as they are applied. The valley flashing is not exposed.