Absorption: the ability of a material to approve within its body amounts of gases or liquid, such as moisture.
Accelerated Wear and tear: the procedure in which products are revealed to a regulated atmosphere where various direct exposures such as warm, water, condensation, or light are altered to multiply their impacts, consequently accelerating the weathering procedure. The material's physical homes are measured hereafter procedure and contrasted to the initial properties of the unexposed material, or to the homes of the product that has actually been subjected to natural weathering.
Adhere: to create two surfaces to be held with each other by attachment, normally with asphalt or roofing cements in built-up roofing and also with contact concretes in some single-ply membranes.
Aggregate: rock, rock, crushed rock, crushed slag, water-worn crushed rock or marble chips used for appearing and/or ballasting a roof system.
Aging: the effect on products that are exposed to an environment for a period of time.
Alligatoring: the splitting of the emerging bitumen on a built-up roof, creating a pattern of cracks similar to an alligator's hide; the splits may or might not expand with the appearing asphalt.
Aluminum: a non-rusting metal occasionally used for steel roofing and also flashing.
Ambient Temperature: the temperature level of the air; air temperature.
Application Rate: the amount (mass, quantity, or density) of product used per unit location.
Apron Flashing: a term used for a flashing situated at the time of the top of the sloped roof and a vertical wall surface or steeper-sloped roof.
Architectural Tile: roof shingles that offers a dimensional appearance.
Asphalt: a dark brownish or black compound discovered in a natural state or, a lot more frequently, left as a deposit after vaporizing or otherwise refining crude oil or petroleum.
Asphalt Solution: a blend of asphalt particles and also an emulsifying representative such as bentonite clay as well as water. These elements are integrated by using a chemical or a clay emulsifying representative as well as mixing or mixing equipment.
Asphalt Felt: an asphalt-saturated and/or an asphalt-coated really felt. (See Felt.).
Asphalt Roof Concrete: a trowelable combination of solvent-based asphalt, mineral stabilizers, various other fibers and/or fillers. Classified by ASTM Criterion D 2822-91 Asphalt Roof Concrete, and also D 4586-92 Asphalt Roof Cement, Asbestos-Free, Types I and II.
Attic: the tooth cavity or open room over the ceiling and also promptly under the roof deck of a steep-sloped roof.
Back-Nailing: (additionally described as Blind-Nailing) the technique of toenailing the back portion of a roofing ply, high roofing device, or various other elements in a manner so that the bolts are covered by the following consecutive ply, or course, and are not subjected to the weather in the finished roof system.
Ballast: a securing product, such as accumulation, or precast concrete pavers, which utilize the force of gravity to hold (or assist in holding) single-ply roof membrane layers in position.
Barrel Vault: a building account including a spherical profile to the roof on the brief axis, yet without any angle modification on a cut along the long axis.
Base Flashing (membrane layer base flashing): plies or strips of roof membrane layer product used to close-off and/or seal a roof at the roof-to-vertical crossways, such as at a roof-to-wall point. Membrane layer base flashing covers the side of the area membrane layer. (Additionally see Flashing.).
Base Ply: the lowermost ply of roofing in a roof membrane or roof system.
Base Sheet: a fertilized, filled, or coated really felt put as the very first ply in some multi-ply built-up and customized 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 metal panels; (3) timber: a strip of wood generally set in or over the architectural deck, used to elevate and/or connect a primary roof covering such as ceramic tile; (4) in a membrane layer roof system: a narrow plastic, timber, or metal bar which is utilized to attach or hold the roof membrane layer and/or base flashing in place.
Batten Joint: a metal panel account attached to and also developed around a beveled timber or steel batten.
Asphalt: (1) a class of amorphous, black or dark colored, (strong, semi-solid, or viscous) cementitious sub-stances, natural or produced, made up mainly of high molecular weight hydrocarbons, soluble in carbon disulfide, and discovered in petroleum asphalts, coal tars as well as pitches, timber tars as well as asphalts; (2) a generic term utilized to represent any kind of material composed mainly of asphalt, generally asphalt or coal tar.
Blackberry (often described as Blueberry or Tar-Boil): a little bubble or blister in the flooding layer of an aggregate-surfaced built-up roof membrane.
Blind-Nailing: the use of nails that are not subjected to the weather in the completed roof.
Blister: an enclosed pocket of air, which might be mixed with water or solvent vapor, entraped in between imper-meable layers of really felt or membrane, or between the membrane and substrate.
Blocking: areas of wood (which may be preservative dealt with) built into a roof assembly, normally connected above the deck as well as below the membrane or flashing, used to tense the deck around an opening, function as a quit for insulation, support an aesthetic, or to act as a nailer for add-on of the membrane layer and/or blinking.
BOMA: Building Owners & Managers Association.
Brake: hand- or power-activated machinery made use of to form steel.
British Thermal Device (BTU): the heat energy called for to raise the temperature level of one pound of water one degree Fahrenheit (joule).
Brooming: an activity carried out to assist in embedment of a ply of roofing material into warm asphalt by using a mop, squeegee, or special apply to ravel the ply and ensure call with the asphalt or adhe-sive under the ply.
Twist: an upward, extended tenting displacement of a roof membrane regularly happening over insulation or deck joints. A fastening might be an indicator of motion within the roof assembly.
Building regulations: published laws as well as regulations developed by an acknowledged agency suggesting style loads, treatments, and building and construction information for structures. Generally putting on marked jurisdictions (city, area, state, etc.). Building codes regulate design, building, as well as top quality of materials, usage and tenancy, place and upkeep of structures and frameworks within the location for which the code has been embraced.
Built-Up Roof Membrane Layer (BUR): a continual, semi-flexible multi-ply roof membrane, containing plies or layers of saturated felts, coated felts, textiles, or mats in between which alternative layers of bitumen are used. Normally, built-up roof membrane layers are surfaced with mineral aggregate as well as asphalt, look at this web-site a liquid-applied coat-ing, or a granule-surfaced cap sheet.
Bundle: a specific package of trembles or shingles.
Butt Joint: a joint created by adjacent, separate areas of product, such as where 2 neighboring pieces of insulation abut.
Button Punch: a procedure of caving in 2 or more densities of metal that are pushed against each various other to stop slippage between the metal.
Butyl: rubber-like material produced by copolymerizing isobutylene with a small amount of isoprene. Butyl may be produced in sheets, or combined with various other elastomeric materials to make sealers and also adhesives.
Butyl Finishing: an elastomeric finish system stemmed from polymerized isobutylene. Butyl coverings are char-acterized by low water vapor permeability.
Butyl Rubber: a synthetic elastomer based on isobutylene and also a small quantity of isoprene. It is vulcanizable and also features reduced leaks in the structure to gases and also water vapor.
Butyl Tape: a sealer tape sometimes made use of in between steel roof panel joints as well as finish laps; additionally made use of to seal various other sorts of sheet steel joints, as well as in various sealant applications.
Camber: a slight convex contour of a surface, such as in a prestressed concrete deck.
Canopy: any type of overhanging or projecting roof framework, usually over entrances 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 run off.
Cant check Strip: a diagonal or triangular-shaped strip of timber, timber fiber, perlite, or other material created to function as a steady transitional airplane in between the horizontal surface area of a roof deck or rigid insulation as well as an upright surface.
Cap Flashing: normally made up of metal, utilized to cover or secure the top edges of the membrane layer base flashing, wall surface flashing, or main flashing. (See Flashing as well as Coping.).
Cap Sheet: a granule-surface coated sheet utilized as the top ply of some built-up or changed bitumen roof membrane layers and/or flashing.
Vein Action: the activity that causes motion of fluids by surface tension when in contact with 2 nearby surfaces such as panel side laps.
Caulking: (1) the physical procedure of securing a joint or juncture; (2) securing and making weather-tight the joints, seams, or gaps between nearby devices by loaded with a sealant.
Tooth cavity Wall surface: a wall surface built or organized to supply an air space within the wall surface (with or without insulating material), in which the internal and also outer materials are tied together by structural framing.
CCF: 100 cubic feet.
Chalk: a fine-grained residue on the surface of a product.
Chalk Line: a line made on the roof by snapping a tight string or cord dusted with colored chalk. Made use of for placement purposes.
Chalking: the destruction or movement of an ingredient, in paints, finishings, or various other products.
Chimney: stone, masonry, upraised steel, or a timber framed structure, containing one or more flues, predicting through and also above the roof.
Cladding: a material used as the exterior wall surface room of a building.
Cleat: a metal strip, plate or metal angle piece, either continuous or individual (" clip"), used to secure two or more components with each other.
Closed-Cut Valley: a technique of valley application in which shingles from one side of the valley expand across the valley while shingles from the opposite side are trimmed about 2 inches (51mm) from the valley centerline.
Closure Strip: a steel or resistant strip, such as neoprene foam, utilized to shut openings produced by joining steel panels or sheets as well as flashings.
Coal Tar: a dark brown to black colored, semi-solid hydrocarbon gotten as residue from the partial evapo-ration or distillation of coal tars. Coal tar pitch is further refined to adapt the following roofing grade requirements:.
Coal Tar Asphalt: a proprietary trade name for Type III coal tar utilized as the dampproofing or waterproof-ing representative in dead-level or low-slope built-up roof membranes, conforming to ASTM D 450, Kind III.
Coal Tar Pitch: a coal tar made use of as the waterproofing representative in dead-level or low-slope built-up roof mem-branes, satisfying ASTM Requirements D 450, Kind I or Type III.
Coal Tar Waterproofing Pitch: a coal tar used as the dampproofing or waterproofing representative in below-grade structures, satisfying ASTM Specification D 450, Type II.
Covered Base Sheet: a really felt that has actually formerly been filled (loaded or fertilized) with asphalt and also later on coated with more difficult, a lot more thick asphalt, which greatly raises its impermeability to moisture.
Coated Textile: materials that have actually been impregnated and/or covered with a plastic-like material in the form of a remedy, dispersion hot-melt, or powder. The term additionally applies to products arising from the application of a preformed film to a textile using calendering.
Coated Felt (Sheet): (1) an asphalt-saturated really felt that has actually likewise been covered on both sides with more challenging, much more thick "layer" asphalt; (2) a glass fiber really felt that has been at the same time fertilized and coated with asphalt on both sides.
Finish: a layer of material spread over a surface area for protection or design. Coatings for SPF are usually fluids, semi-liquids, or mastics; spray, roller, or brush applied; as well as healed to an elastomeric uniformity.
Cohesion: the degree of inner bonding of one compound to itself.
Cold Process Built-Up Roof: a continual, semi-flexible roof membrane layer, consisting of a ply or plies of felts, mats or other support fabrics that are laminated along with alternative layers of read liquid-applied (usually asphalt-solvent based) roof cements or adhesives set up at ambient or a somewhat elevated temperature.
Combustible: capable of burning.
Compatible Materials: 2 or even more materials that can be combined, mixed, or connected without dividing, reacting, or influencing the materials detrimentally.
Composition Roof shingles: a system of asphalt roof shingles roofing.
Concealed-Nail Technique: a technique of asphalt roll roofing application in which all nails are driven into the underlying course of roofing and covered by an adhered, overlapping course.
Condensation: the conversion of water vapor internet or other gas to fluid state as the temperature drops or atmos-pheric pressure rises. (Additionally see Humidity.).
Conductor Head: a transition element in between a through-wall scupper as well as downspout to gather and also route run-off water.
Get in touch with Seals: adhesives utilized to adhere or bond various roofing components. These adhesives adhere mated elements quickly on get in touch with of surface areas to which the adhesive has actually been used.
Contamination: the process of making a product or surface area dirty or inadequate for its intended objective, typically by the addition or add-on of undesirable international materials.
Coping: the covering piece in addition to a wall surface which is exposed to the climate, typically made of steel, masonry, or rock. It is preferably sloped to shed water back onto the roof.
Copper: an all-natural weathering steel used in metal roofing; generally utilized in 16 or 20 ounce per square foot density (4.87 or 6.10 kg/sq m).
Cornice: the ornamental horizontal molding or forecasted roof overhang.
Counterflashing: developed metal sheeting secured on or into a wall, visual, pipe, roof device, or other surface area, to cover and secure the upper edge of the membrane layer base blinking or underlying steel blinking as well as connected bolts from direct exposure to the weather.
Course: (1) the term utilized for each and every row of shingles of roofing material that develops the roofing, waterproofing, or flashing system; (2) one layer of a collection of products applied to a surface (e.g., a five-course wall blinking is composed of three applications of roof concrete with one ply of really felt or fabric sandwiched between each layer of roof concrete).
Protection: the surface area covered by a particular quantity of a certain material.
Cricket: an elevated roof substratum or framework, created to divert water site web around a chimney, curb, far from a wall surface, development joint, or other projection/penetration. (See Saddle.).
Cross Ventilation: the impact that is provided when air relocations through a roof cavity between the vents.
Cupola: a fairly little roofed framework, usually established on the ridge or optimal of a main roof area.
Curb: (1) an increased member used to sustain roof infiltrations, such as skylights, mechanical tools, hatches, and so on over the degree of the roof surface area; (2) a raised roof border reasonably reduced in elevation.
Remedy: a procedure where a material is caused to develop irreversible molecular linkages by exposure to chemicals, warm, pressure, and/or weathering.
Treat Time: the time needed to result curing. The moment needed for a product to reach its desirable long-term physical attributes.
Cutoff: an irreversible detail created to seal as well as prevent lateral water motion in an insulation system, and also utilized to separate sections of a roof. (Note: A cutoff is different from a tie-off, which might be a momentary or long-term seal.) (See Tie-Off.).
Cutout: the open sections of a strip tile in between the tabs.