Absorption: the capacity of a material to approve within its body quantities of gases or liquid, such as moisture.
Accelerated Weathering: the procedure in which products are subjected to a controlled environment where different exposures such as warmth, water, condensation, or light are altered to amplify their impacts, therefore speeding up the weathering procedure. The material's physical properties are determined hereafter process and contrasted to the original residential properties of the unexposed material, or to the buildings of the material that has actually been subjected to all-natural weathering.
Adhere: to create two surface areas to be held with each other by bond, usually with asphalt or roofing cements in built-up roofing and with get in touch with cements in some single-ply membranes.
Aggregate: rock, rock, smashed stone, crushed slag, water-worn gravel or marble chips used for emerging and/or ballasting a roof system.
Aging: the result on products that are subjected to a setting for a period of time.
Alligatoring: the splitting of the emerging bitumen on a built-up roof, producing a pattern of splits comparable to an alligator's hide; the cracks might or may not extend through the emerging bitumen.
Aluminum: a non-rusting steel sometimes utilized for metal roofing and also flashing.
Ambient Temperature level: the temperature level of the air; air temperature.
Application Price: the quantity (mass, quantity, or thickness) of material used per unit location.
Apron Flashing: a term used for a blinking situated at the time of the top of the sloped roof and a vertical wall surface or steeper-sloped roof.
Building Shingle: shingle that provides a dimensional appearance.
Asphalt: a dark brown or black compound discovered in an all-natural state or, much more frequently, left as a deposit after vaporizing or otherwise refining petroleum or petroleum.
Asphalt Emulsion: a mix of asphalt bits as well as an emulsifying representative such as bentonite clay and also water. These parts are incorporated by utilizing a chemical or a clay emulsifying representative and also blending or mixing equipment.
Asphalt Felt: an asphalt-saturated and/or an asphalt-coated really felt. (See Really Felt.).
Asphalt Roof Concrete: a trowelable combination of solvent-based asphalt, mineral stabilizers, various other fibers and/or fillers. Identified by ASTM Requirement D 2822-91 Asphalt Roof Concrete, as well as D 4586-92 Asphalt Roof Cement, Asbestos-Free, Types I as well as II.
Attic: the tooth cavity or open area above the ceiling and quickly under the roof deck of a steep-sloped roof.
Back-Nailing: (additionally described as Blind-Nailing) the practice of nailing the back portion of a roofing ply, high roofing device, or various other elements in a manner to ensure that the fasteners are covered by the following consecutive ply, or program, as well as are not exposed to the climate in the ended up roof system.
Ballast: a securing material, such as accumulation, or precast concrete pavers, which use the force of gravity to hold (or assist in holding) single-ply roof membrane layers in position.
Barrel Vault: a structure account featuring a spherical profile to the roof on the short axis, yet without any angle change on a cut along the lengthy axis.
Base Flashing (membrane base flashing): plies or strips of roof membrane layer material made use of to close-off and/or seal a roof at the roof-to-vertical junctions, such as at a roof-to-wall point. Membrane layer base blinking covers the edge of the area membrane. (Also see Blinking.).
Base Ply: the lowermost ply of roofing in a roof membrane or roof system.
Base Sheet: a fertilized, saturated, or layered felt positioned as the very first ply in some multi-ply built-up and also customized asphalt roof membranes.
Batten: (1) cap or cover; (2) in a steel roof: a steel closure set over, or covering the joint between, surrounding metal panels; (3) timber: a strip of wood normally set in or over the structural deck, used to elevate and/or connect a primary roof covering such as floor tile; (4) in a membrane layer roof system: a narrow plastic, wood, or steel bar which is used to secure or hold the roof membrane and/or base flashing in place.
Batten Seam: a steel panel account connected to and also formed around a beveled timber or steel batten.
Bitumen: (1) a class of amorphous, black or dark tinted, (solid, semi-solid, or thick) cementitious sub-stances, all-natural or manufactured, made up principally of high molecular weight hydrocarbons, soluble in carbon disulfide, as well as located in petroleum asphalts, coal tars as well as pitches, timber tars and also asphalts; (2) a common term used to signify any type of product made up principally of bitumen, generally asphalt or coal tar.
Blackberry (often described as Blueberry or Tar-Boil): a tiny bubble or blister in the flood finish of an aggregate-surfaced built-up roof membrane layer.
Blind-Nailing: making use of nails that are not exposed to the weather in the finished roofing system.
Blister: an enclosed pocket of air, which might be blended with water or solvent vapor, entraped in between imper-meable layers of really felt or membrane, or between the membrane as well as substrate.
Stopping: sections of wood (which might be preservative dealt with) built right into a roof setting up, normally connected above the deck and also listed below the membrane layer or blinking, used to stiffen the deck around an opening, work as a quit for insulation, support a curb, or to work as a nailer for add-on of the membrane layer and/or flashing.
BOMA: Building Owners & Managers Association.
Brake: hand- or power-activated machinery used to form metal.
British Thermal Device (BTU): the heat energy required to elevate the temperature level of one extra pound of water one level Fahrenheit (joule).
Brooming: an action carried out to facilitate embedment of a ply of roofing product right into hot bitumen by utilizing a mop, squeegee, or special implement to ravel the ply as well as guarantee contact with the asphalt or adhe-sive under the ply.
Buckle: an upwards, extended tenting variation of a roof membrane regularly happening over insulation or deck joints. A buckle might be an indication of activity within the roof setting up.
Building regulations: released policies and also ordinances developed by an acknowledged agency suggesting style loads, treatments, and building and construction details for frameworks. Typically relating to assigned territories (city, region, state, and so on). Building regulations control design, building and construction, and top quality of materials, use and also occupancy, place and also maintenance of structures and also structures within the area for which the code has actually been adopted.
Built-Up Roof Membrane Layer (BUR): a continuous, semi-flexible multi-ply roof membrane layer, containing plies or layers of saturated felts, coated felts, materials, or floor coverings between which alternating layers of asphalt are used. Typically, built-up roof membranes are appeared with mineral accumulation and bitumen, a liquid-applied coat-ing, or a granule-surfaced cap sheet.
Package: a specific plan of trembles or shingles.
Butt Joint: a joint created by surrounding, separate sections of material, such as where two bordering items of insulation abut.
Switch Punch: a process of indenting two or more densities of metal that are pressed against each various other to avoid slippage in between the steel.
Butyl: rubber-like product generated by copolymerizing isobutylene with a small amount of isoprene. Butyl may be manufactured in sheets, or blended with other elastomeric materials to make sealants and adhesives.
Butyl Covering: an elastomeric finishing system originated from polymerized isobutylene. Butyl layers are char-acterized by low tide vapor leaks in the structure.
Butyl Rubber: an artificial elastomer based upon isobutylene and also a small quantity of isoprene. It is vulcanizable as well as features low permeability to gases and water vapor.
Butyl Tape: a sealer tape occasionally made use of in between steel roof panel seams and end laps; also made use of to secure other types of sheet metal joints, and also in numerous sealant applications.
Camber: a small convex contour of a surface area, such as in a prestressed concrete deck.
Cover: any kind of overhanging resource or projecting roof framework, normally over entryways or doors. In some cases the extreme end is in need of support.
Cant: a beveling of foam at an ideal angle joint for stamina and water escape.
Cant Strip: a beveled or triangular-shaped strip of i was reading this wood, timber fiber, perlite, or other product created to function as a gradual transitional aircraft between the straight surface area of a roof deck or rigid insulation and also a vertical surface area.
Cap Flashing: normally composed of steel, used to cover or secure the upper sides of the membrane layer base flashing, wall blinking, or key flashing. (See Flashing and also Coping.).
Cap Sheet: a granule-surface coated sheet made use of as the top ply of some built-up or changed bitumen roof membrane layers and/or flashing.
Blood vessel Activity: the action that causes movement of liquids by surface area tension when in contact with 2 nearby surfaces such as panel side laps.
Caulking: (1) the physical process of securing a joint or juncture; (2) sealing and also making weather-tight the joints, seams, or spaces in between adjacent systems by loaded with a sealant.
Tooth cavity Wall surface: a wall constructed or arranged to supply an air room within the wall (with or without protecting product), in which the inner and outer products are looped by structural framing.
CCF: 100 cubic feet.
Chalk: a grainy deposit externally of a product.
Chalk Line: a line made on the roof by breaking a taut string or cord dusted with colored chalk. Made use of for positioning purposes.
Chalking: the degradation or migration of an active ingredient, in paints, coverings, or other products.
Chimney: rock, stonework, built metal, or a wood framed structure, containing several flues, forecasting via and over the roof.
Cladding: a product utilized as the exterior wall room of a structure.
Cleat: a metal strip, plate or metal angle piece, either continual or individual (" clip"), made use of to secure 2 or even more components together.
Closed-Cut Valley: an approach of valley application in which shingles from one side of the valley extend across the valley while shingles from the other side are trimmed roughly 2 inches (51mm) from the valley centerline.
Closure Strip: a steel or resistant strip, such as neoprene foam, utilized to shut openings created by joining steel panels or sheets and flashings.
Coal Tar: a dark brownish to black colored, semi-solid hydrocarbon acquired as residue from the partial evapo-ration or purification of coal tars. Coal tar pitch is additional fine-tuned to adapt the following roofing quality specifications:.
Coal Tar Asphalt: an exclusive brand name for Type III coal tar used as the dampproofing or waterproof-ing representative in dead-level or low-slope built-up roof membranes, conforming to ASTM D 450, Type III.
Coal Tar Pitch: a coal tar utilized as the waterproofing representative in dead-level or low-slope built-up roof mem-branes, complying with ASTM Spec D 450, Kind I or Type III.
Coal Tar Waterproofing Pitch: a coal tar utilized as the dampproofing or waterproofing representative in below-grade frameworks, satisfying ASTM Specification D 450, Type II.
Layered Base Sheet: a really felt that has actually formerly been filled (loaded or fertilized) with asphalt as well as later on coated with more challenging, a lot more viscous asphalt, which greatly enhances its impermeability to wetness.
Covered Material: textiles that have been impregnated and/or coated with a plastic-like material in the kind of a remedy, diffusion hot-melt, or powder. The term also applies to materials arising from the application of a preformed movie to a material by means of see calendering.
Covered Felt (Sheet): (1) an asphalt-saturated felt that has actually additionally been covered on both sides with more challenging, more viscous "coating" asphalt; (2) a glass fiber felt that has actually been at the same time impregnated and also covered with asphalt on both sides.
Finish: a layer of material spread over a surface for defense or decoration. Coatings for SPF are generally fluids, semi-liquids, or mastics; spray, roller, or brush applied; and also treated to an elastomeric uniformity.
Communication: the level of internal bonding of one compound to itself.
Cold Process Built-Up Roof: a constant, semi-flexible roof membrane layer, containing a ply or plies of felts, floor coverings or other reinforcement materials that are laminated flooring along with alternate layers of liquid-applied (generally asphalt-solvent based) roof cements or adhesives installed at ambient or a somewhat raised temperature level.
Flammable: capable of burning.
Compatible Materials: two or even more materials that can be combined, combined, or affixed without dividing, responding, or influencing the products detrimentally.
Make-up Tile: an unit of asphalt roof shingles roofing.
Concealed-Nail Technique: a technique of asphalt roll roofing application in which all nails are driven right into the underlying training course of roofing as well as covered by an adhered, overlapping program.
Condensation: the conversion of water vapor or other gas to fluid state as the temperature level goes down or atmos-pheric pressure rises. (Also see Humidity.).
Conductor Head: a change part between a through-wall scupper and also downspout to accumulate and also guide run-off water.
Call Cements: adhesives made use of to stick or bond different roofing parts. These adhesives adhere mated components right away on contact of surface areas to which the adhesive has actually been used.
Contamination: the process of making a material or surface area unclean or inadequate for its designated purpose, usually by the enhancement or add-on of unfavorable foreign materials.
Coping: the covering piece in addition to a wall which is exposed to the climate, typically made of steel, masonry, or rock. It is preferably sloped to lose water back onto the roof.
Copper: a natural weathering steel utilized in steel roofing; normally utilized in 16 or 20 ounce per square foot density (4.87 or 6.10 kg/sq m).
Cornice: the ornamental straight molding or projected roof important link overhang.
Counterflashing: developed metal sheeting protected on or right into a wall, aesthetic, pipe, roof unit, or other surface area, to cover and shield the top edge of the membrane base blinking or underlying metal flashing and also associated bolts from direct exposure to the weather condition.
Program: (1) the term made use of for each row of shingles of roofing material that creates the roofing, waterproofing, or flashing system; (2) one layer of a series of products related to a surface area (e.g., a five-course wall flashing is made up of 3 applications of roof cement with one ply of really felt or material sandwiched in between each layer of roof concrete).
Insurance coverage: the area covered by a specific amount of a certain material.
Cricket: an elevated roof substrate or structure, built to divert water around a chimney, curb, far from a wall, development joint, or various other projection/penetration. (See Saddle.).
Cross Air flow: the effect that is Visit Website offered when air relocations via a roof tooth cavity in between the vents.
Cupola: a reasonably small roofed structure, typically established on the ridge or height of a main roof area.
Curb: (1) an elevated participant used to support roof infiltrations, such as skylights, mechanical devices, hatches, and so on above the degree of the roof surface area; (2) a raised roof boundary relatively reduced in elevation.
Cure: a process whereby a material is caused to create irreversible molecular affiliations by direct exposure to chemicals, heat, pressure, and/or weathering.
Cure Time: the moment called for to impact treating. The time required for a product to reach its preferable long-lasting physical attributes.
Cutoff: a long-term detail designed to secure and also stop lateral water motion in an insulation system, and also utilized to isolate sections of a roof. (Note: A cutoff is different from a tie-off, which may be a momentary or long-term seal.) (See Tie-Off.).
Cutout: the open portions of a strip tile between the tabs.