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A.
Absorption: the capacity of a product to accept within its body quantities of gases or liquid, such as moisture.
Accelerated Wear and tear: the process in which products are revealed to a controlled setting where different exposures such as warmth, water, condensation, or light are altered to multiply their effects, thereby increasing the weathering process. The product's physical properties are determined hereafter procedure and compared to the original residential properties of the unexposed material, or to the buildings of the material that has been subjected to all-natural weathering.
Adhere: to cause two surfaces to be held together by bond, typically with asphalt or roofing cements in built-up roofing and with contact concretes in some single-ply membrane layers.
Accumulation: rock, rock, crushed stone, crushed slag, water-worn crushed rock or marble chips made use of for surfacing and/or ballasting a roof system.
Aging: the result on materials that are exposed to an atmosphere for a period of time.
Alligatoring: the fracturing of the surfacing asphalt on a built-up roof, creating a pattern of fractures similar to an alligator's conceal; the splits may or may not expand with the emerging bitumen.
Light weight aluminum: a non-rusting metal occasionally made use of for steel roofing and also flashing.
Ambient Temperature: the temperature level of the air; air temperature.
Application Rate: the amount (mass, quantity, or thickness) of product used per unit area.
Apron Flashing: a term utilized for a blinking located at the point of the top of the sloped roof and also an upright wall or steeper-sloped roof.
Architectural Tile: tile that offers a dimensional appearance.
Asphalt: a dark brownish or black material located in a natural state or, more frequently, left as a residue after evaporating or otherwise processing crude oil or oil.
Asphalt Solution: a mix of asphalt bits as well as an emulsifying representative such as bentonite clay as well as water. These parts are integrated by using a chemical or a clay emulsifying agent as well as blending or mixing equipment.
Asphalt Felt: an asphalt-saturated and/or an asphalt-coated really felt. (See Really Felt.).
Asphalt Roof Concrete: a trowelable mix of solvent-based bitumen, mineral stabilizers, various other fibers and/or fillers. Classified by ASTM Standard 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 dental caries or open area above the ceiling as well as right away under the roof deck of a steep-sloped roof.
B.
Back-Nailing: (likewise referred to as Blind-Nailing) the practice of toenailing the back part of a roofing ply, steep roofing unit, or other components in a fashion to make sure that the bolts are covered by the following sequential ply, or course, and are not revealed to the climate in the completed roof system.
Ballast: an anchoring material, such as aggregate, or precast concrete pavers, which employ the pressure of gravity to hold (or help in holding) single-ply roof membranes in position.
Barrel Safe: a building account featuring a rounded profile to the roof on the short axis, yet without any angle change on a cut along the long axis.
Base Flashing (membrane base blinking): plies or strips of roof membrane product utilized to close-off and/or seal a roof at the roof-to-vertical intersections, such as at a roof-to-wall time. Membrane base blinking covers the edge of the field membrane. (Also see Blinking.).
Base Ply: the lowermost ply of roofing in a roof membrane layer or roof system.
Base Sheet: an impregnated, filled, or covered really felt placed as the initial ply in some multi-ply built-up as well as modified bitumen roof membrane layers.
Batten: (1) cap or cover; (2) in a metal roof: a steel closure set over, or covering the joint in between, surrounding steel panels; (3) wood: a strip of wood typically set in or over the structural deck, utilized to raise and/or connect a primary roof covering such as ceramic tile; (4) in a membrane layer roof system: a slim plastic, wood, or metal bar which is used to attach or hold the roof membrane layer and/or base blinking in place.
Batten Joint: a metal panel profile affixed to and created around a diagonal timber or steel batten.
Asphalt: (1) a class of amorphous, black or dark colored, (strong, semi-solid, or thick) cementitious sub-stances, natural or made, made up mainly of high molecular weight hydrocarbons, soluble in carbon disulfide, as well as found in petroleum asphalts, coal tars and also pitches, timber tars as well as asphalts; (2) a generic term made use of to represent any kind of material made up mainly of bitumen, generally asphalt or coal tar.
Blackberry (sometimes described as Blueberry or Tar-Boil): a small bubble or sore in the flood finishing of an aggregate-surfaced built-up roof membrane layer.
Blind-Nailing: using nails that are not exposed to the weather condition in the ended up roofing system.
Blister: an enclosed pocket of air, which might be combined with water or solvent vapor, trapped in between imper-meable layers of felt or membrane layer, or between the membrane and also substrate.
Blocking: sections of timber (which might be preservative treated) developed right into a roof setting up, normally attached above the deck as well as below the membrane or blinking, made use of to tense the deck around an opening, function as a stop for insulation, support an aesthetic, or to act as a nailer for accessory of the membrane and/or blinking.
BOMA: Building Owners & Managers Organization.
Brake: hand- or power-activated equipment used to form metal.
British Thermal Device (BTU): the heat energy required to elevate the temperature of one extra pound of water one degree Fahrenheit (joule).
Brooming: an activity executed to promote embedment of a ply of roofing material right into warm bitumen by utilizing a broom, squeegee, or unique execute to ravel the ply as well as ensure call with the asphalt or adhe-sive under the ply.
Twist: an upwards, elongated tenting displacement of a roof membrane layer frequently taking place over insulation or deck joints. A buckle might be an indication of motion within the roof setting up.
Building Code: published laws and ordinances developed by an acknowledged firm suggesting style tons, procedures, as well as building and construction information for frameworks. Usually applying to designated jurisdictions (city, region, state, etc.). Building ordinance manage style, building, and high quality of products, usage as well as tenancy, location as well as upkeep of structures as well as structures within the location for which the code has actually been adopted.
Built-Up Roof Membrane (BUR): a continual, semi-flexible multi-ply roof membrane, including plies or layers of saturated felts, layered felts, fabrics, or floor coverings in between which alternative layers of bitumen are applied. Normally, built-up roof membrane layers are surfaced with mineral aggregate as well as asphalt, a liquid-applied coat-ing, or a granule-surfaced cap sheet.
Package: a specific package of trembles or shingles.
Butt Joint: a joint developed by surrounding, different sections of material, such as where two surrounding pieces of insulation abut.
Switch Strike: a procedure of caving in 2 or more thicknesses of metal that are pressed against each other to avoid slippage in between the steel.
Butyl: rubber-like material created by copolymerizing isobutylene with a percentage of isoprene. Butyl might be made in sheets, or mixed with various other elastomeric products to make sealers as well as adhesives.
Butyl Layer: an elastomeric coating system derived from polymerized isobutylene. Butyl finishings are char-acterized by low tide vapor permeability.
Butyl Rubber: a synthetic elastomer based upon isobutylene and also a small quantity of isoprene. It is vulcanizable as well as features low permeability to gases as well as water vapor.
Butyl Tape: a sealant tape in some cases utilized between steel roof panel joints as well as finish laps; also used to secure various other kinds of sheet metal joints, and in numerous sealer applications.
C.
Camber: a minor convex contour of a surface area, such as in a prestressed concrete deck.
Cover: any overhanging or predicting 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 appropriate angle joint for stamina and water escape.
Cant Strip: a diagonal or triangular-shaped strip of wood, timber fiber, perlite, or other product created to function as a gradual transitional aircraft in between the horizontal surface area of a roof deck or stiff insulation and also a vertical surface.
Cap Flashing: normally composed of steel, Homepage used to cover or protect the top edges of the membrane base blinking, wall flashing, or key flashing. (See Flashing and also Coping.).
Cap Sheet: a granule-surface covered 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 creates movement of fluids by surface area tension when touching 2 surrounding surface areas such as panel side laps.
Caulking: (1) the physical process of sealing a joint or time; (2) sealing as well as making weather-tight the joints, joints, or voids between surrounding units by loaded with a sealant.
Dental caries Wall find here surface: a wall developed or prepared to offer an air area within the wall surface (with or without insulating material), in which the inner and also external materials are tied together by structural framework.
CCF: 100 cubic feet.
Chalk: a powdery deposit externally of a product.
Chalk Line: a line made on the roof by breaking a taut string or cord dusted with colored chalk. Utilized for placement objectives.
Chalking: the deterioration or movement of an ingredient, in paints, coverings, or other materials.
Chimney: stone, masonry, upreared steel, or a timber mounted structure, including one or more flues, forecasting with as well as above the roof.
Cladding: a material utilized as the outside wall surface unit of a building.
Cleat: a metal strip, plate or steel angle item, either continual or specific (" clip"), made use of to secure two or even more components together.
Closed-Cut Valley: a method of valley application in which shingles from one side of the valley expand throughout the valley while shingles from the opposite side are trimmed approximately 2 inches (51mm) from the valley centerline.
Closure Strip: a steel or resistant strip, such as neoprene foam, used to close openings created by signing up with metal panels or sheets as well as flashings.
Coal Tar: a dark brown to black tinted, semi-solid hydrocarbon obtained as residue from the partial evapo-ration or distillation of coal tars. Coal tar pitch is further improved to conform to the following roofing grade specifications:.
Coal Tar Asphalt: a proprietary brand name for Kind III coal tar used as the dampproofing or waterproof-ing agent in dead-level or low-slope built-up roof membrane layers, complying with ASTM D 450, Kind III.
Coal Tar Pitch: a coal tar used as the waterproofing agent in dead-level or low-slope built-up roof mem-branes, satisfying ASTM Specification D 450, Kind I or Kind III.
Coal Tar Waterproofing Pitch: a coal tar made use of as the dampproofing or waterproofing agent in below-grade frameworks, complying with ASTM Spec D 450, Type II.
Covered Base Sheet: a felt that has previously been filled (filled or fertilized) with asphalt as well as later covered with tougher, a lot more viscous asphalt, which significantly increases its impermeability to dampness.
Covered Fabric: textiles that have actually been fertilized and/or coated with a plastic-like product in the type of a service, diffusion hot-melt, or powder. The term likewise puts on materials arising from the application of a preformed movie to a textile by means of calendering.
Covered Felt (Sheet): (1) an asphalt-saturated felt that has actually likewise been covered on both sides with more difficult, extra viscous "coating" asphalt; (2) a glass fiber really felt that has been simultaneously fertilized and covered with asphalt on both sides.
Coating: a layer of material spread over a surface area for defense or design. Coatings for SPF are typically fluids, semi-liquids, or mastics; spray, roller, or brush applied; and treated to an elastomeric consistency.
Cohesion: the degree of inner bonding of one substance to itself.
Cold Refine Built-Up Roof: a constant, semi-flexible roof membrane layer, including a ply or plies of felts, floor coverings or other support fabrics that are laminated flooring along with alternating layers of liquid-applied (usually asphalt-solvent based) roof seals or adhesives set up at ambient or a somewhat elevated temperature.
Combustible: with the ability of burning.
Compatible Products: 2 or more compounds that can be blended, blended, or affixed without separating, reacting, or influencing the go to this website materials adversely.
Structure Tile: a system of asphalt roof shingles roofing.
Concealed-Nail Technique: a method of asphalt roll roofing application in which all nails are driven right into the underlying course of roofing as well as covered by an adhered, overlapping program.
Condensation: the conversion of water vapor or other gas to liquid state as the temperature drops or atmos-pheric stress rises. (Likewise see Humidity.).
Conductor Head: a transition element in between a through-wall scupper as well as downspout to accumulate as well as direct run-off water.
Call Seals: adhesives used to stick or bond various roofing components. These adhesives adhere mated parts promptly on call of surface areas to which the adhesive click site has been used.
Contamination: the process of making a material or surface area dirty or inadequate for its designated purpose, typically by the enhancement or accessory of unfavorable foreign substances.
Coping: the covering piece on top of a wall which is revealed to the weather condition, normally constructed from metal, stonework, or rock. It is ideally sloped to lose water back onto the roof.
Copper: an all-natural weathering metal made use of in metal roofing; normally used in 16 or 20 ounce per square foot density (4.87 or 6.10 kg/sq m).
Cornice: the ornamental straight molding or forecasted roof overhang.
Counterflashing: created steel sheeting secured on or right into a wall, aesthetic, pipe, roof device, or other surface area, to cover and secure the upper side of the membrane base flashing or underlying metal blinking as well as linked bolts from direct exposure to the climate.
Program: (1) the term used for every row of shingles of roofing product that forms the roofing, waterproofing, or flashing system; (2) one layer of a collection of products put on a surface area (e.g., a five-course wall surface flashing is composed of three applications of roof concrete with one ply of felt or fabric sandwiched between each layer of roof cement).
Insurance coverage: the surface covered by a specific amount of a specific product.
Cricket: a raised roof substrate or structure, constructed to divert water around a smokeshaft, curb, away from a wall, useful source development joint, or various other projection/penetration. (See Saddle.).
Cross Ventilation: the result that is supplied when air moves with a roof dental caries in between the vents.
Cupola: a relatively small roofed structure, usually established on the ridge or height of a main roof location.
Curb: (1) an elevated participant used to sustain roof penetrations, such as skylights, mechanical tools, hatches, etc. over the degree of the roof surface; (2) an elevated roof border fairly reduced in elevation.
Cure: a process wherein a product is created to create long-term molecular links by direct exposure to chemicals, warm, stress, and/or weathering.
Treat Time: the moment called for to result treating. The time required for a product to reach its preferable long-term physical characteristics.
Cutoff: a permanent information created to seal as well as stop side water motion in an insulation system, and used to separate sections of a roof. (Note: A cutoff is various from a tie-off, which may be a short-term or permanent seal.) (See Tie-Off.).
Cutout: the open sections of a strip roof shingles in between the tabs.