Absorption: the capability of a product to accept within its body amounts of gases or liquid, such as wetness.
Accelerated Wear and tear: the process in which materials are subjected to a regulated setting where various direct exposures such as heat, water, condensation, or light are altered to magnify their impacts, consequently accelerating the weathering procedure. The material's physical properties are measured hereafter procedure and also contrasted to the initial properties of the unexposed product, or to the residential or commercial properties of the material that has actually been revealed to natural weathering.
Adhere: to trigger 2 surfaces to be held together by adhesion, generally with asphalt or roofing concretes in built-up roofing and with call cements in some single-ply membranes.
Aggregate: rock, rock, crushed stone, smashed slag, water-worn crushed rock or marble chips utilized for emerging and/or ballasting a roof system.
Aging: the result on products that are exposed to a setting for a period of time.
Alligatoring: the fracturing of the emerging asphalt on a built-up roof, generating a pattern of splits similar to an alligator's conceal; the splits may or might not expand through the emerging asphalt.
Light weight aluminum: a non-rusting metal sometimes utilized for steel roofing and also blinking.
Ambient Temperature level: the temperature level of the air; air temperature.
Application Rate: the quantity (mass, volume, or thickness) of product used each location.
Apron Flashing: a term made use of for a blinking located at the point of the top of the sloped roof as well as a vertical wall or steeper-sloped roof.
Building Roof shingles: roof shingles that supplies a dimensional appearance.
Asphalt: a dark brown or black substance found in a natural state or, a lot more typically, left as a deposit after vaporizing or otherwise processing crude oil or petroleum.
Asphalt Emulsion: a mixture of asphalt particles and also an emulsifying representative such as bentonite clay as well as water. These elements are combined by utilizing a chemical or a clay emulsifying representative as well as mixing or mixing equipment.
Asphalt Felt: an asphalt-saturated and/or an asphalt-coated felt. (See Felt.).
Asphalt Roof Cement: a trowelable combination of solvent-based asphalt, mineral stabilizers, other fibers and/or fillers. Classified by ASTM Criterion D 2822-91 Asphalt Roof Cement, and D 4586-92 Asphalt Roof Concrete, Asbestos-Free, Types I and II.
Attic: the cavity or open area above the ceiling and also quickly under the roof deck of a steep-sloped roof.
Back-Nailing: (likewise referred to as Blind-Nailing) the technique of nailing the back part of a roofing ply, steep roofing device, or other parts in a fashion to make sure that the bolts are covered by the following consecutive ply, or training course, and are not subjected to the climate in the completed roof system.
Ballast: an anchoring material, such as aggregate, or precast concrete pavers, which use the force of gravity to hold (or aid in holding) single-ply roof membrane layers in position.
Barrel Vault: a structure profile including a rounded account to the roof on the brief axis, however without angle modification on a cut along the lengthy axis.
Base Flashing (membrane layer base blinking): plies or strips of roof membrane product made use of to close-off and/or seal a roof at the roof-to-vertical crossways, such as at a roof-to-wall time. Membrane base flashing covers the edge of the field membrane layer. (Likewise see Blinking.).
Base Ply: the lowermost ply of roofing in a roof membrane layer or roof system.
Base Sheet: a fertilized, saturated, or coated felt put as the first ply in some multi-ply built-up and also customized bitumen roof membranes.
Batten: (1) cap or cover; (2) in a metal roof: a steel closure set over, or covering the joint between, surrounding metal panels; (3) wood: a strip of wood normally embeded in or over the architectural deck, used to elevate and/or connect a key roof covering such as ceramic tile; (4) in a membrane roof system: a narrow plastic, wood, or metal bar which is used to secure or hold the roof membrane layer and/or base flashing in place.
Batten Joint: a metal panel profile attached to as well as developed around a beveled wood or steel batten.
Asphalt: (1) a course of amorphous, black or dark tinted, (strong, semi-solid, or thick) cementitious sub-stances, natural or produced, composed mainly of high molecular weight hydrocarbons, soluble in carbon disulfide, and also located in oil asphalts, coal tars as well as pitches, timber tars and asphalts; (2) a generic term utilized to signify any type of material composed primarily of bitumen, generally asphalt or coal tar.
Blackberry (often referred to as Blueberry or Tar-Boil): a tiny bubble or sore in the flood finishing of an aggregate-surfaced built-up roof membrane.
Blind-Nailing: the use of nails that are not revealed to the climate in the completed roofing system.
Sore: an enclosed pocket of air, which might be blended with water or solvent vapor, caught between imper-meable layers of felt or membrane layer, or between the membrane and also substrate.
Blocking: areas of wood (which may be preservative dealt with) developed right into a roof assembly, typically attached above the deck and listed below the membrane or flashing, made use of to stiffen the deck around an opening, work as a quit for insulation, sustain a curb, or to serve as a nailer for add-on of the membrane layer and/or blinking.
BOMA: Building Owners & Managers Organization.
Brake: hand- or power-activated equipment used to create steel.
British Thermal Device (BTU): the heat needed to increase the temperature of one pound of water one level Fahrenheit (joule).
Brooming: an activity performed to assist in embedment of a ply of roofing material right into hot asphalt by using a broom, squeegee, or unique carry out to ravel the ply and make certain contact with the asphalt or adhe-sive under the ply.
Bend: an upwards, elongated tenting displacement of a roof membrane often taking place over insulation or deck joints. A fastening might be an indication of motion within the roof setting up.
Building Code: released regulations and statutes developed by an acknowledged agency suggesting style loads, treatments, as well as construction details for frameworks. Usually putting on assigned territories (city, region, state, etc.). Building regulations regulate style, building and construction, and quality of materials, usage as well as tenancy, place and maintenance of structures and structures within the area for which the code has been embraced.
Built-Up Roof Membrane Layer (BUR): a continual, semi-flexible multi-ply roof membrane layer, containing plies or layers of saturated felts, layered felts, textiles, or floor coverings in between which alternative layers of asphalt are used. Typically, built-up roof membrane layers are surfaced with mineral accumulation as well as asphalt, a liquid-applied coat-ing, or a granule-surfaced cap sheet.
Bundle: a private package of shakes or shingles.
Butt Joint: a joint formed by adjacent, different areas of material, such as where two bordering pieces of insulation abut.
Button Strike: a procedure of indenting 2 or even more thicknesses of steel that are pressed versus each other to stop slippage in between the steel.
Butyl: rubber-like product created by copolymerizing isobutylene with a small amount of isoprene. Butyl might be made in sheets, or mixed with other elastomeric products to make sealants and adhesives.
Butyl Covering: an elastomeric finish system originated from polymerized isobutylene. Butyl finishes are char-acterized by low tide vapor leaks in the structure.
Butyl Rubber: a synthetic elastomer based on isobutylene as well as a small amount of isoprene. It is vulcanizable and also includes low leaks in the structure to gases and also water vapor.
Butyl Tape: a sealant tape occasionally utilized in between steel roof panel joints and finish laps; likewise used to secure other kinds of sheet metal joints, as well as in various sealer applications.
Camber: a slight convex contour of a surface, such as in a prestressed concrete deck.
Cover: any kind of overhanging or projecting roof framework, generally over entries or doors. Occasionally the extreme end is unsupported.
Cant: a beveling of foam at an appropriate angle joint for strength as well as water run off.
Cant Strip: a beveled or triangular-shaped strip of timber, timber fiber, perlite, or other product designed to function as a steady transitional plane between the straight surface area of a roof deck or rigid insulation as well as an upright surface.
Cap Flashing: typically made up of steel, used to cover or secure the top edges of the membrane layer base blinking, wall surface blinking, or key flashing. (See Flashing as well as Coping.).
Cap Sheet: a granule-surface layered sheet used as the top ply of some built-up or customized asphalt roof membranes and/or flashing.
Capillary Action: the action that causes movement of visit liquids by surface area tension when touching 2 surrounding surface areas such as panel side laps.
Caulking: (1) the physical procedure of sealing a joint or point; (2) sealing and making weather-tight the joints, seams, or spaces between nearby units by filling with a sealant.
Cavity Wall: a wall built or organized to offer an air room within the wall surface (with or without shielding product), in which the inner and also external products are tied together by structural framing.
CCF: 100 cubic feet.
Chalk: a powdery residue externally of a product.
Chalk Line: a line made on the roof by breaking a tight string or cable dusted with colored chalk. Used for alignment objectives.
Liquid chalking: the destruction or movement of a component, in paints, finishings, or other materials.
Smokeshaft: rock, masonry, prefabricated metal, or a timber mounted framework, having several flues, projecting through and over the roof.
Cladding: a product used as the outside wall unit of a building.
Cleat: a metal strip, plate or steel angle item, either constant or individual (" clip"), made use of to protect two or even more parts together.
Closed-Cut Valley: an approach of valley application in which shingles from one side of the valley prolong across the valley while shingles from the other side are trimmed back about 2 inches (51mm) from the valley centerline.
Closure Strip: a metal or resistant strip, such as neoprene foam, made use of to shut openings created by signing up with metal panels or sheets and also flashings.
Coal Tar: a dark brown to black colored, semi-solid hydrocarbon obtained as residue from the partial evapo-ration or distillation of coal tars. Coal tar pitch is further fine-tuned to comply with the complying with roofing grade specifications:.
Coal Tar Bitumen: an exclusive trade name for Type III coal tar used as the dampproofing or waterproof-ing representative in dead-level or low-slope built-up roof membrane layers, adapting 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 Requirements D 450, Type I or Type III.
Coal Tar Waterproofing Pitch: a coal tar used as the dampproofing or waterproofing agent in below-grade frameworks, conforming to ASTM Requirements D 450, Type II.
Layered Base Sheet: a click here for info felt that has actually previously been filled (loaded or impregnated) with asphalt as well as later on covered with harder, more thick asphalt, which substantially enhances its impermeability to wetness.
Covered Textile: textiles that have actually been fertilized and/or coated with a plastic-like material in the type of an option, diffusion hot-melt, or powder. The term additionally puts on products arising from the application of a preformed movie to a textile using calendering.
Layered Felt (Sheet): (1) an asphalt-saturated felt that has also been coated on both sides with more difficult, a lot more thick "layer" asphalt; (2) a glass fiber really felt that has actually been simultaneously impregnated and covered with asphalt on both sides.
Coating: a layer of material spread over a surface area for defense or decoration. Coatings for SPF are generally fluids, semi-liquids, or mastics; spray, roller, or brush used; and also treated to an elastomeric consistency.
Cohesion: the degree of internal bonding of one material to itself.
Cold Refine Built-Up Roof: a constant, semi-flexible roof membrane, containing a ply or plies of felts, mats or various other reinforcement materials that are laminated flooring together with alternative layers of liquid-applied (generally asphalt-solvent based) roof cements or adhesives mounted at ambient or a somewhat elevated temperature level.
Combustible: efficient in burning.
Suitable Products: two or more materials that can be blended, blended, or affixed without dividing, reacting, or influencing the materials adversely.
Make-up Shingle: a device of asphalt roof shingles roofing.
Concealed-Nail Method: an approach of asphalt roll roofing application in which all nails are driven into the underlying training course of roofing as well as covered by an adhered, overlapping course.
Condensation: the conversion of water vapor or various other gas to fluid state as the temperature goes down or atmos-pheric pressure surges. (Likewise see Humidity.).
Conductor Head: a shift part in between a through-wall scupper as well as downspout to gather and guide run-off water.
Contact Seals: adhesives used to stick or bond various roofing components. These adhesives adhere mated elements immediately on call of surfaces to which the adhesive has been applied.
Contamination: the process of making a product or surface area dirty or unsuited for its designated objective, typically by the enhancement or accessory of undesirable foreign substances.
Coping: the covering item on top of a wall which is exposed to the climate, generally made of metal, masonry, or stone. It investigate this site is ideally sloped to shed water back onto the roof.
Copper: a natural weathering metal utilized in steel roofing; typically utilized in 16 or 20 ounce per square foot density (4.87 or 6.10 kg/sq m).
Cornice: the attractive straight molding or projected roof overhang.
Counterflashing: formed metal sheeting protected on or right into a wall surface, aesthetic, pipeline, roof device, or various other surface area, to cover and safeguard the upper edge of the membrane layer base blinking or underlying steel blinking as well as linked bolts from direct exposure to the climate.
Training course: (1) the term made use of for each and every row of shingles of roofing product that creates the roofing, waterproofing, or blinking system; (2) one layer of a collection of products put on a surface (e.g., a five-course wall surface flashing is made up of three applications of roof cement with one ply of felt or fabric sandwiched in between each layer of roof concrete).
Protection: the area covered by a certain quantity of a particular material.
Cricket: a raised roof substratum or structure, constructed to divert water around a smokeshaft, aesthetic, far from a wall, expansion joint, or other projection/penetration. (See Saddle.).
Cross Ventilation: the result that is given when air steps via a roof cavity in between the vents.
Cupola: a fairly little roofed structure, usually established on the ridge or height of a main roof location.
Suppress: (1) a raised participant utilized to support roof infiltrations, such as skylights, mechanical devices, hatches, etc. over the level of the roof surface area; (2) an increased roof perimeter reasonably low in elevation.
Cure: a procedure where a material is created to develop permanent molecular affiliations by exposure to chemicals, warmth, pressure, and/or weathering.
Heal Time: the time called for to impact healing. The moment required for a product to reach its desirable lasting physical qualities.
Cutoff: an irreversible detail made to seal and also avoid side water movement in an insulation system, as well as made use of to isolate areas of a roof. (Note: A cutoff is various from a tie-off, which may be a momentary or irreversible seal.) (See Tie-Off.).
Intermediary: the open portions of a strip roof shingles in between the tabs.