Absorption: the ability of a material to approve within its body quantities of gases or liquid, such as dampness.
Accelerated Wear and tear: the process in which products are subjected to a controlled setting where various exposures such as warmth, water, condensation, or light are become magnify their results, therefore accelerating the weathering procedure. The material's physical properties are determined hereafter process as well as contrasted to the original residential properties of the unexposed material, or to the buildings of the material that has actually been revealed to natural weathering.
Adhere: to create two surface areas to be held together by adhesion, normally with asphalt or roofing cements in built-up roofing as well as with contact cements in some single-ply membrane layers.
Aggregate: rock, stone, smashed rock, smashed slag, water-worn gravel or marble chips made use of for surfacing and/or ballasting a roof system.
Aging: the effect on products that are revealed to an atmosphere for a period of time.
Alligatoring: the breaking of the appearing bitumen on a built-up roof, producing a pattern of fractures comparable to an alligator's conceal; the splits might or may not prolong via the emerging asphalt.
Light weight aluminum: a non-rusting metal in some cases made use of for steel roofing and also flashing.
Ambient Temperature: the temperature of the air; air temperature.
Application Rate: the amount (mass, quantity, or density) of product used each area.
Apron Flashing: a term made use of for a flashing situated at the juncture of the top of the sloped roof and a vertical wall or steeper-sloped roof.
Architectural Shingle: shingle that provides a dimensional appearance.
Asphalt: a dark brown or black compound discovered in a natural state or, a lot more frequently, left as a deposit after evaporating or otherwise processing crude oil or petroleum.
Asphalt Solution: a mixture of asphalt fragments and also an emulsifying representative such as bentonite clay as well as water. These elements are integrated by utilizing a chemical or a clay emulsifying representative and also blending or blending equipment.
Asphalt Felt: an asphalt-saturated and/or an asphalt-coated really felt. (See Really Felt.).
Asphalt Roof Cement: a trowelable mix of solvent-based bitumen, mineral stabilizers, various other fibers and/or fillers. Identified by ASTM Requirement D 2822-91 Asphalt Roof Cement, as well as D 4586-92 Asphalt Roof Cement, Asbestos-Free, Kind I and also II.
Attic: the tooth cavity or open space over the ceiling as well as quickly under the roof deck of a steep-sloped roof.
Back-Nailing: (additionally referred to as Blind-Nailing) the technique of toenailing the back portion of a roofing ply, high roofing system, or various other elements in a way to ensure that the fasteners are covered by the following sequential ply, or training course, as well as are not exposed to the weather condition in the finished roof system.
Ballast: an anchoring product, such as aggregate, or precast concrete pavers, which use the force of gravity to hold (or aid in holding) single-ply roof membranes in position.
Barrel Safe: a building profile featuring a spherical profile to the roof on the short axis, yet without any angle adjustment on a cut along the long axis.
Base Flashing (membrane layer base blinking): plies or strips of roof membrane layer material made use of to close-off and/or seal a roof at the roof-to-vertical intersections, such as at a roof-to-wall point. Membrane layer base blinking covers the side of the field membrane layer. (Additionally see Flashing.).
Base Ply: the lowermost ply of roofing in a roof membrane layer or roof system.
Base Sheet: a fertilized, saturated, or covered really felt placed as the very first ply in some multi-ply built-up and also modified bitumen roof membrane layers.
Batten: (1) cap or cover; (2) in a steel roof: a steel closure established over, or covering the joint in between, adjacent metal panels; (3) timber: a strip of timber usually set in or over the architectural deck, made use of to boost and/or connect a main roof covering such as tile; (4) in a membrane roof system: a narrow plastic, wood, or metal bar which is utilized to attach or hold the roof membrane layer and/or base flashing in place.
Batten Seam: a metal panel profile connected to and also created around a diagonal timber or steel batten.
Asphalt: (1) a course of amorphous, black or dark tinted, (strong, semi-solid, or thick) cementitious sub-stances, all-natural or manufactured, composed primarily of high molecular weight hydrocarbons, soluble in carbon disulfide, as well as found in petroleum asphalts, coal tars and pitches, wood tars and asphalts; (2) a generic term made use of to represent any kind of product made up mainly of bitumen, typically asphalt or coal tar.
Blackberry (sometimes referred to as Blueberry or Tar-Boil): a small bubble or blister in the flooding layer of an aggregate-surfaced built-up roof membrane layer.
Blind-Nailing: using nails that are not subjected to the weather in the finished roof.
Sore: an encased pocket of air, which might be combined with water or solvent vapor, caught between imper-meable layers of really felt or membrane layer, or between the membrane layer and also substratum.
Blocking: areas of timber (which may be preservative dealt with) developed into a roof setting up, usually connected over the deck and below the membrane or blinking, used to stiffen the deck around an opening, work as a stop for insulation, sustain a visual, or to work as a nailer for attachment of the membrane layer and/or flashing.
BOMA: Structure Owners & Managers Association.
Brake: hand- or power-activated equipment utilized to create 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 performed to promote embedment of a ply of roofing material right into hot asphalt by utilizing a broom, squeegee, or unique execute to ravel the ply and make sure call with the asphalt or adhe-sive under the ply.
Twist: an upwards, elongated tenting variation of a roof membrane layer frequently happening over insulation or deck joints. A clasp may be an indicator of activity within the roof assembly.
Building ordinance: published policies and also ordinances established by an acknowledged agency recommending layout loads, treatments, and building and construction information for structures. Typically putting on assigned jurisdictions (city, region, state, and so on). Building codes manage style, building, and high quality of materials, use as well as occupancy, place as well as maintenance of buildings as well as structures within the area for which the code has been adopted.
Built-Up Roof Membrane (BUR): a continuous, 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 applied. Typically, built-up roof membranes are emerged with mineral aggregate as well as bitumen, a liquid-applied coat-ing, or a granule-surfaced cap sheet.
Bundle: a private package of trembles or shingles.
Butt Joint: a joint created by adjacent, separate sections of product, such as where 2 bordering items of insulation abut.
Button Strike: a procedure of indenting two or even more densities of metal that are pushed versus each other to prevent slippage in between the metal.
Butyl: rubber-like material generated by copolymerizing isobutylene with a percentage of isoprene. Butyl may be produced in sheets, or mixed with other elastomeric products to make sealants and adhesives.
Butyl Layer: an elastomeric finish system originated from polymerized isobutylene. Butyl finishings are char-acterized by low water vapor leaks in the structure.
Butyl Rubber: a synthetic elastomer based upon isobutylene as well as a small amount of isoprene. It is vulcanizable and also includes reduced leaks in the structure to gases and also water vapor.
Butyl Tape: a sealant tape sometimes used between metal roof panel joints and finish laps; also made use of to seal various other kinds of sheet metal joints, as well as in numerous sealant applications.
Camber: a mild convex curve of a surface area, such as in a prestressed concrete deck.
Canopy: any kind of overhanging or predicting roof structure, normally over entrances or doors. Often the severe end is unsupported.
Cant: a beveling of foam at an ideal angle joint for strength as well as water escape.
Cant Strip: a beveled or triangular-shaped strip of wood, timber fiber, perlite, or various other material developed to function as a steady transitional aircraft between the straight surface area of a roof deck or rigid insulation as well as an see this here upright surface area.
Cap Flashing: normally composed of metal, made use of to cover or shield the upper edges of the membrane base flashing, wall blinking, or main blinking. (See Flashing and also Coping.).
Cap Sheet: a granule-surface layered sheet made use of as the leading ply of some built-up or modified bitumen roof membranes and/or flashing.
Capillary Action: the action that causes movement of liquids by surface stress when touching 2 surrounding surfaces such as panel side laps.
Caulking: (1) the physical process of sealing a joint or juncture; (2) sealing and making weather-tight the joints, seams, or gaps in between surrounding devices by loaded with a sealer.
Dental caries Wall: a click site wall surface developed or set up to supply an air area within the wall (with or without insulating material), in which the internal as well as outer materials are tied together by architectural framework.
CCF: 100 cubic feet.
Chalk: a grainy residue on the surface of a product.
Chalk Line: a line made on the roof by snapping a tight string or cable dusted with colored chalk. Made use of for positioning functions.
Chalking: the destruction or movement of a component, in paints, layers, or various other materials.
Smokeshaft: stone, masonry, erected metal, or a wood mounted structure, containing several flues, forecasting through as well as above the roof.
Cladding: a product utilized as the outside wall surface enclosure of a structure.
Cleat: a steel strip, plate or metal angle item, either continual or specific (" clip"), utilized to safeguard two or even more components with each other.
Closed-Cut Valley: a technique of valley application in which shingles from one side of the valley expand throughout the valley while shingles from the other side are trimmed back about 2 inches (51mm) from the valley centerline.
Closure Strip: a metal or resilient strip, such as neoprene foam, utilized to shut openings developed by signing up with steel panels or sheets and 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 fine-tuned to adapt the adhering to roofing grade requirements:.
Coal Tar Bitumen: 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 agent in dead-level or low-slope built-up roof mem-branes, conforming to 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, conforming to ASTM Spec D 450, Kind II.
Layered Base Sheet: a felt that has previously been saturated (filled up or fertilized) with asphalt as well as later on covered with tougher, more viscous asphalt, which greatly enhances its impermeability to wetness.
Covered Material: materials that have been impregnated and/or coated with a plastic-like material in the form of a solution, dispersion hot-melt, or powder. The term also applies to materials resulting from the application of a preformed movie to a textile using calendering.
Layered Felt (Sheet): (1) an asphalt-saturated really felt that has also been coated on both sides with harder, more thick "coating" asphalt; (2) a glass fiber really felt that has actually been simultaneously fertilized and also covered with asphalt on both sides.
Finishing: a layer of material spread over a surface for defense or design. Coatings for SPF are typically liquids, semi-liquids, or mastics; spray, roller, or brush used; and also healed to an elastomeric consistency.
Cohesion: the degree of inner bonding of one compound to itself.
Cold Process Built-Up Roof: a constant, semi-flexible roof membrane layer, consisting of a ply or plies of felts, floor coverings or various other reinforcement textiles that are laminated along with alternating layers of liquid-applied (typically asphalt-solvent based) roof seals or adhesives set up at ambient or a somewhat elevated temperature level.
Combustible: efficient in burning.
Suitable Materials: 2 or more substances that can be blended, blended, or connected without separating, responding, or impacting the materials adversely.
Make-up Roof shingles: a device of asphalt shingle roofing.
Concealed-Nail Approach: 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 training course.
Condensation: the conversion of water vapor or other gas to fluid state as the temperature level drops or atmos-pheric pressure increases. (Additionally see Dew Point.).
Conductor Head: a shift component between a through-wall scupper as well as downspout to accumulate and guide run-off water.
Call Seals: adhesives used to adhere or bond different roofing parts. These adhesives stick mated components quickly on contact of surfaces to which the adhesive has been applied.
Contamination: the procedure of making a product or surface unclean or unsuited for its intended function, generally by the enhancement or attachment of undesirable foreign compounds.
Coping: the covering item in addition to a wall surface which is subjected to the weather, normally made from steel, stonework, or rock. It is preferably sloped to shed water back onto the roof.
Copper: a natural weathering metal used in metal roofing; normally made use of in 16 or 20 ounce per square foot thickness (4.87 or 6.10 kg/sq m).
Cornice: the decorative horizontal molding or predicted roof overhang.
Counterflashing: created steel sheeting safeguarded on or right into a wall, curb, pipeline, roof device, or other surface area, to cover as well as safeguard the upper edge of the membrane layer base blinking or underlying steel flashing and linked bolts from exposure to the weather.
Course: (1) the term made use of for each discover here and every row of shingles of roofing product that develops the roofing, waterproofing, or flashing system; (2) one layer of a collection of materials applied to a surface area (e.g., a five-course wall flashing is made up of three applications of roof concrete with one ply of really felt or material sandwiched in between each layer of roof concrete).
Protection: the area covered by a particular quantity of a particular product.
Cricket: an elevated roof substrate or framework, constructed to draw away water around a chimney, aesthetic, away from a wall, growth joint, or other projection/penetration. (See Saddle.).
Cross Air flow: the effect that is given when air relocations via a roof tooth cavity in between the vents.
Cupola: a fairly little roofed framework, typically established on the ridge or top of a major roof area.
Suppress: (1) a raised member made use of to support roof infiltrations, such as skylights, mechanical equipment, hatches, etc. over the level of the roof surface; (2) an elevated roof perimeter fairly reduced in height.
Remedy: a procedure whereby a material is created to create permanent molecular links by direct exposure to chemicals, heat, stress, and/or weathering.
Treat Time: the moment required to impact treating. The time needed for a product to reach its preferable long-term physical attributes.
Cutoff: an irreversible information designed to seal as well as stop side water activity in an insulation system, and also used to isolate sections of a roof. (Note: A cutoff is different from a tie-off, which might be a short-term or irreversible seal.) (See Tie-Off.).
Intermediary: the open parts of a strip shingle in between the tabs.