Absorption: the capacity of a material to approve within its body quantities of gases or fluid, such as wetness.
Accelerated Weathering: the process in which materials are subjected to a controlled setting where various direct exposures such as heat, water, condensation, or light are become multiply their effects, thus speeding up the weathering procedure. The material's physical buildings are gauged hereafter procedure and also contrasted to the initial residential properties of the unexposed material, or to the residential properties of the product that has been exposed to natural weathering.
Adhere: to trigger 2 surfaces to be held together by adhesion, usually with asphalt or roofing cements in built-up roofing and also with get in touch with cements in some single-ply membrane layers.
Accumulation: rock, stone, smashed rock, crushed slag, water-worn crushed rock or marble chips utilized for emerging and/or ballasting a roof system.
Aging: the effect on products that are subjected to a setting for a period of time.
Alligatoring: the cracking of the appearing bitumen on a built-up roof, creating a pattern of cracks similar to an alligator's conceal; the fractures may or may not prolong with the surfacing bitumen.
Light weight aluminum: a non-rusting steel in some cases made use of for metal roofing and also flashing.
Ambient Temperature level: the temperature level of the air; air temperature.
Application Rate: the amount (mass, quantity, or density) of material used each area.
Apron Flashing: a term utilized for a blinking located at the point of the top of the sloped roof and an upright wall or steeper-sloped roof.
Building Roof shingles: tile that provides a dimensional appearance.
Asphalt: a dark brown or black material located in a natural state or, a lot more generally, left as a residue after vaporizing or otherwise refining petroleum or oil.
Asphalt Emulsion: a blend of asphalt fragments and also an emulsifying agent such as bentonite clay and water. These elements are integrated by utilizing a chemical or a clay emulsifying representative and mixing or blending machinery.
Asphalt Felt: an asphalt-saturated and/or an asphalt-coated felt. (See Felt.).
Asphalt Roof Cement: a trowelable mix of solvent-based asphalt, mineral stabilizers, various other fibers and/or fillers. Categorized by ASTM Requirement D 2822-91 Asphalt Roof Cement, as well as D 4586-92 Asphalt Roof Concrete, Asbestos-Free, Kind I and also II.
Attic: the dental caries or open room over the ceiling and also immediately under the roof deck of a steep-sloped roof.
Back-Nailing: (also referred to as Blind-Nailing) the practice of nailing the back section of a roofing ply, high roofing unit, or various other parts in a fashion to make sure that the bolts are covered by the following sequential ply, or course, and are not revealed to the weather in the completed roof system.
Ballast: an anchoring material, such as accumulation, or precast concrete pavers, which utilize the force of gravity to hold (or assist in holding) single-ply roof membranes in position.
Barrel Vault: a building account featuring a rounded profile to the roof on the short axis, however without angle adjustment on a cut along the lengthy axis.
Base Flashing (membrane base blinking): plies or strips of roof membrane material made use of to close-off and/or seal a roof at the roof-to-vertical crossways, such as at a roof-to-wall juncture. Membrane layer base flashing covers the side of the area membrane. (Additionally see Flashing.).
Base Ply: the lowermost ply of roofing in a roof membrane or roof system.
Base Sheet: a fertilized, saturated, or covered really felt positioned as the first ply in some multi-ply built-up and customized asphalt roof membrane layers.
Batten: (1) cap or cover; (2) in a metal roof: a steel closure established over, or covering the joint in between, nearby metal panels; (3) wood: a strip of timber typically embeded in or over the structural deck, utilized to elevate and/or affix a key roof covering such as floor tile; (4) in a membrane layer roof system: a narrow plastic, wood, or metal bar which is utilized to attach or hold the roof membrane and/or base blinking in place.
Batten Seam: a steel panel profile connected to and also formed around a diagonal timber or metal batten.
Bitumen: (1) a class of amorphous, black or dark tinted, (strong, semi-solid, or thick) cementitious sub-stances, all-natural or made, composed mostly of high molecular weight hydrocarbons, soluble in carbon disulfide, and also found in petroleum asphalts, coal tars as well as pitches, wood tars as well as asphalts; (2) a common term used to denote any type of material made up principally of bitumen, typically asphalt or coal tar.
Blackberry (occasionally described as Blueberry or Tar-Boil): a small bubble or blister in the flood covering of an aggregate-surfaced built-up roof membrane.
Blind-Nailing: making use of nails that are not subjected to the weather in the completed roofing system.
Blister: an enclosed pocket of air, which may be combined with water or solvent vapor, entraped in between imper-meable layers of really felt or membrane, or between the membrane and substratum.
Blocking: sections of wood (which may be preservative treated) built right into a roof setting up, generally connected above the deck and below the membrane or flashing, used to tense the deck around an opening, work as a quit for insulation, support a curb, or to function as a nailer for attachment of the membrane layer and/or flashing.
BOMA: Building Owners & Managers Organization.
Brake: hand- or power-activated equipment used to create steel.
British Thermal System (BTU): the heat energy called for to increase the temperature of one extra pound of water one degree Fahrenheit (joule).
Brooming: an activity accomplished to help with embedment of a ply of roofing product right into hot asphalt by utilizing a mop, squeegee, or special apply to smooth out the ply and also make sure contact with the asphalt or adhe-sive under the ply.
Twist: an upwards, lengthened tenting variation of a roof membrane regularly occurring over insulation or deck joints. A clasp may be a sign of movement within the roof setting up.
Building regulations: published guidelines and regulations developed by a recognized company suggesting style tons, treatments, and building and construction details for structures. Normally relating to designated jurisdictions (city, region, state, and so on). Building ordinance control layout, construction, as well as high quality of products, usage and also occupancy, location and maintenance of structures and also frameworks within the location for which the code has actually been adopted.
Built-Up Roof Membrane (BUR): a constant, semi-flexible multi-ply roof membrane layer, containing plies or layers of saturated felts, layered felts, textiles, or mats between which alternating layers of bitumen are used. Normally, built-up roof membranes are emerged with mineral accumulation as well as asphalt, a liquid-applied coat-ing, or a granule-surfaced cap sheet.
Bundle: a private bundle of shakes or shingles.
Butt Joint: a joint formed by adjacent, separate areas of material, such as where 2 bordering items of insulation abut.
Switch Punch: a procedure of caving in 2 or even more densities of steel that are pressed against each various other to stop slippage in between the steel.
Butyl: rubber-like product generated by copolymerizing isobutylene with a small amount of isoprene. Butyl might be produced in sheets, or mixed with other elastomeric products to make sealers as well as adhesives.
Butyl Finish: an elastomeric finishing system derived from polymerized isobutylene. Butyl layers are char-acterized by low tide vapor permeability.
Butyl Rubber: a synthetic elastomer based upon isobutylene and a small amount of isoprene. It is vulcanizable and includes low leaks in the structure to gases as well as water vapor.
Butyl Tape: a sealer tape often utilized between metal roof panel joints as well as finish laps; likewise used to secure various other kinds of sheet steel joints, and in various sealer applications.
Camber: a slight convex curve of a surface area, such as in a prestressed concrete deck.
Canopy: any type of looming or forecasting roof framework, generally over entryways or doors. Occasionally the severe end is in need of support.
Cant: a beveling of foam at an appropriate angle joint for toughness and also water run off.
Cant Strip: a beveled or triangular-shaped strip of timber, timber fiber, perlite, or various other material created to serve as a progressive transitional aircraft in between the horizontal surface of a roof deck or rigid insulation and a vertical surface area.
Cap Flashing: usually composed of steel, used to cover or shield the top sides of the membrane layer base blinking, wall flashing, or key flashing. (See Flashing and also Coping.).
Cap Sheet: a granule-surface i loved this coated sheet utilized as the top ply of some built-up or customized asphalt roof membrane layers and/or blinking.
Vein Activity: the activity that creates activity of liquids by surface tension when touching 2 surrounding surface areas such as panel side laps.
Caulking: (1) the physical procedure of securing a joint or point; (2) sealing as well as making weather-tight the joints, seams, or voids between adjacent systems by full of a sealant.
Tooth cavity Wall surface: a wall developed or organized to provide an air space within the wall surface (with or without shielding material), in which the inner and external materials are tied together by architectural framework.
CCF: 100 cubic feet.
Chalk: a grainy deposit externally of a product.
Chalk Line: a line made on the roof by snapping a taut string or cable dusted with colored chalk. Made use of for alignment functions.
Chalking: the deterioration or migration of an ingredient, in paints, coverings, or various other materials.
Chimney: rock, masonry, upraised steel, or a wood framed framework, including several flues, predicting via as well as above the roof.
Cladding: a product used as the outside wall unit of a building.
Cleat: a steel strip, plate or metal angle piece, either continuous or specific (" clip"), utilized to safeguard two or even more components with each other.
Closed-Cut Valley: a method of valley application in which shingles from one side of the valley prolong visit our website throughout the valley while shingles from the opposite side are trimmed back around 2 inches (51mm) from the valley centerline.
Closure Strip: a metal or resistant strip, such as neoprene foam, made use of to shut openings developed by joining steel panels or sheets and also flashings.
Coal Tar: a dark brown to black tinted, semi-solid hydrocarbon acquired as deposit from the partial evapo-ration or purification of coal tars. Coal tar pitch is further fine-tuned to comply with the adhering to roofing grade specs:.
Coal Tar Asphalt: an exclusive brand name for Type III coal tar utilized as the dampproofing or waterproof-ing representative in dead-level or low-slope built-up roof membrane layers, complying with 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, satisfying ASTM Specification D 450, Type I or Type III.
Coal Tar Waterproofing Pitch: a coal tar used as the dampproofing or waterproofing agent in below-grade structures, adapting ASTM Requirements D 450, Kind II.
Covered Base Sheet: a felt that has formerly been filled (filled or impregnated) with asphalt as well as later on coated with more difficult, extra thick asphalt, which substantially increases its see this site impermeability to moisture.
Layered Textile: textiles that have actually been impregnated and/or coated with a plastic-like material in the form of a solution, diffusion hot-melt, or powder. The term likewise applies to materials arising from the application of a preformed movie to a material by means of calendering.
Coated Felt (Sheet): (1) an asphalt-saturated really felt that has actually also been coated on both sides with tougher, more viscous "coating" asphalt; (2) a glass fiber really felt that has been concurrently impregnated and also coated with asphalt on both sides.
Coating: a layer of product spread over a surface for defense or design. Coatings for SPF are typically fluids, semi-liquids, or mastics; spray, roller, or brush applied; and healed to an elastomeric uniformity.
Communication: the degree of interior bonding of one substance to itself.
Cold Refine Built-Up Roof: a continuous, semi-flexible roof membrane layer, consisting of a ply or plies of felts, floor coverings or other support fabrics that are laminated flooring together with alternate layers of liquid-applied (usually asphalt-solvent based) roof cements or adhesives set up at ambient or a somewhat elevated temperature level.
Combustible: with the ability of burning.
Compatible Materials: 2 or more compounds that can be combined, blended, or connected without dividing, reacting, or influencing the materials negatively.
Make-up Shingle: a system of asphalt tile roofing.
Concealed-Nail Method: a technique of asphalt roll roofing application in which all nails are driven right into the underlying training course of roofing and covered by an adhered, overlapping program.
Condensation: the conversion of water vapor or various other gas to fluid state as the temperature level goes down or atmos-pheric pressure surges. (Also see Dew Point.).
Conductor Head: a shift element in between a through-wall scupper and also downspout to accumulate and direct run-off water.
Contact Cements: adhesives utilized to adhere or bond different roofing parts. These adhesives stick mated elements immediately on contact of surfaces to which the adhesive has been applied.
Contamination: the process of making a material or surface area dirty or inadequate for its desired objective, generally by the enhancement or accessory of undesirable foreign compounds.
Coping: the covering piece in addition to a wall which is exposed to the climate, generally constructed from steel, stonework, or stone. It is preferably sloped to drop water back onto the roof.
Copper: a natural weathering metal made use of in metal roofing; generally used in 16 or 20 ounce per square foot density (4.87 or 6.10 kg/sq m).
Cornice: the ornamental horizontal molding or projected roof overhang.
Counterflashing: created metal sheeting secured on or right into a wall surface, curb, pipeline, rooftop unit, or various other surface area, to cover and shield the upper edge of the membrane layer base flashing or underlying steel flashing and linked fasteners from direct exposure to the weather condition.
Course: (1) the term made use of for every row of shingles of roofing product that creates the roofing, waterproofing, or blinking system; (2) see this here one layer of a series of products applied to a surface area (e.g., a five-course wall flashing is composed of 3 applications of roof cement with one ply of really felt or fabric sandwiched in between each layer of roof concrete).
Coverage: the surface covered by a details amount of a specific product.
Cricket: an elevated roof substratum or framework, constructed to draw away water around a smokeshaft, curb, far from a wall surface, expansion joint, or various other projection/penetration. (See Saddle.).
Cross Air flow: the effect that is offered when air relocations via a roof cavity in between the vents.
Cupola: a relatively little roofed framework, usually set on the ridge or height of a major roof location.
Curb: (1) an increased participant utilized to sustain roof infiltrations, such as skylights, mechanical tools, hatches, and so on over the level of the roof surface; (2) an increased roof boundary reasonably reduced in elevation.
Treatment: a process whereby a material is caused to form irreversible molecular linkages by direct exposure to chemicals, heat, pressure, and/or weathering.
Cure Time: the time required to result treating. The moment required for a material to reach its preferable long-term physical features.
Cutoff: a permanent information created to secure as well as protect against side water activity in an insulation system, and also utilized to separate areas of a roofing system. (Note: A cutoff is different from a tie-off, which may be a temporary or permanent seal.) (See Tie-Off.).
Intermediary: the site web open parts of a strip roof shingles between the tabs.