Absorption: the capacity of a product to approve within its body amounts of gases or fluid, such as dampness.
Accelerated Wear and tear: the process in which products are exposed to a regulated atmosphere where different direct exposures such as warmth, water, condensation, or light are become amplify their effects, thereby accelerating the weathering procedure. The product's physical homes are gauged hereafter process as well as compared to the original residential or commercial properties of the unexposed material, or to the residential properties of the product that has been revealed to all-natural weathering.
Adhere: to cause 2 surface areas to be held with each other by attachment, commonly with asphalt or roofing cements in built-up roofing and also with contact cements in some single-ply membranes.
Accumulation: rock, stone, smashed rock, smashed slag, water-worn crushed rock or marble chips utilized for emerging and/or ballasting a roof system.
Aging: the effect on materials that are exposed to an environment for a period of time.
Alligatoring: the cracking of the emerging asphalt on a built-up roof, creating a pattern of splits similar to an alligator's hide; the splits might or might not prolong through the surfacing bitumen.
Light weight aluminum: a non-rusting metal often made use of for steel roofing and flashing.
Ambient Temperature: the temperature level of the air; air temperature level.
Application Rate: the amount (mass, quantity, or thickness) of product applied each area.
Apron Flashing: a term used for a blinking situated at the juncture of the top of the sloped roof as well as an upright wall surface or steeper-sloped roof.
Architectural Roof shingles: tile that supplies a dimensional look.
Asphalt: a dark brownish or black compound found in a natural state or, extra typically, left as a deposit after vaporizing or otherwise refining petroleum or oil.
Asphalt Solution: a mixture of asphalt particles and an emulsifying agent such as bentonite clay and also water. These components are integrated by utilizing a chemical or a clay emulsifying representative and blending or mixing equipment.
Asphalt Felt: an asphalt-saturated and/or an asphalt-coated felt. (See Felt.).
Asphalt Roof Concrete: a trowelable mix of solvent-based bitumen, mineral stabilizers, various other fibers and/or fillers. Categorized by ASTM Criterion D 2822-91 Asphalt Roof Cement, as well as D 4586-92 Asphalt Roof Concrete, Asbestos-Free, Kind I as well as II.
Attic: the dental caries or open area over the ceiling as well as immediately under the roof deck of a steep-sloped roof.
Back-Nailing: (also described as Blind-Nailing) the method of nailing the back portion of a roofing ply, high roofing unit, or various other elements in a fashion to make sure that the bolts are covered by the next sequential ply, or training course, and are not revealed to the climate in the finished roof system.
Ballast: an anchoring product, such as aggregate, or precast concrete pavers, which employ the pressure of gravity to hold (or aid in holding) single-ply roof membranes in place.
Barrel Safe: a structure account featuring a spherical profile to the roof on the short axis, however without angle change on a cut along the lengthy axis.
Base Flashing (membrane base flashing): plies or strips of roof membrane layer material used 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 blinking covers the side of the field membrane. (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 positioned as the initial ply in some multi-ply built-up and customized bitumen roof membranes.
Batten: (1) cap or cover; (2) in a metal roof: a steel closure set over, or covering the joint between, adjacent metal panels; (3) wood: a strip of timber usually embeded in or over the architectural deck, utilized to raise 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 secure or hold the roof membrane layer and/or base blinking in position.
Batten Joint: a steel panel account affixed to and also formed around a beveled timber or metal batten.
Bitumen: (1) a course of amorphous, black or dark colored, (solid, semi-solid, or viscous) cementitious sub-stances, all-natural or manufactured, composed mostly of high molecular weight hydrocarbons, soluble in carbon disulfide, as well as discovered in petroleum asphalts, coal tars and also pitches, timber tars and asphalts; (2) a common term used to denote any product made up principally of bitumen, generally asphalt or coal tar.
Blackberry (sometimes referred to as Blueberry or Tar-Boil): a small bubble or sore in the flooding covering of an aggregate-surfaced built-up roof membrane layer.
Blind-Nailing: the use of nails that are not revealed to the weather condition in the ended up roof.
Blister: an encased pocket of air, which might be combined with water or solvent vapor, trapped between imper-meable layers of felt or membrane, or between the membrane and substratum.
Barring: areas of wood (which may be preservative treated) constructed into a roof assembly, normally affixed above the deck as well as listed below the membrane or blinking, utilized to tense the deck around an opening, work as a stop for insulation, sustain a curb, or to serve as a nailer for attachment of the membrane and/or flashing.
BOMA: Structure Owners & Managers Association.
Brake: hand- or power-activated equipment used to create steel.
British Thermal Device (BTU): the heat energy needed to increase the temperature of one extra pound of water one level Fahrenheit (joule).
Brooming: an action carried out to help with embedment of a ply of roofing product into hot asphalt by using a mop, squeegee, or special execute to smooth out the ply as well as make sure call with the bitumen or adhe-sive under the ply.
Buckle: an up, extended tenting displacement of a roof membrane often taking place over insulation or deck joints. A clasp might be an indication of movement within the roof assembly.
Building Code: released guidelines and ordinances established by a recognized company prescribing layout tons, treatments, as well as building and construction details for structures. Typically relating to assigned jurisdictions (city, county, state, etc.). Building codes regulate layout, building, as well as top quality of materials, usage and also tenancy, location and upkeep of buildings and also structures within the location for which the code has been embraced.
Built-Up Roof Membrane Layer (BUR): a continual, semi-flexible multi-ply roof membrane, including plies or layers of saturated felts, covered felts, materials, or floor coverings in between which alternating layers of bitumen are used. Typically, built-up roof membranes are surfaced with mineral aggregate and also asphalt, a liquid-applied coat-ing, or a granule-surfaced cap sheet.
Bundle: an individual package of trembles or shingles.
Butt Joint: a joint formed by adjacent, different sections of product, such as where 2 bordering pieces of insulation abut.
Button Strike: a procedure of indenting 2 or more thicknesses of steel that are pushed versus each various other to stop websites slippage in between the steel.
Butyl: rubber-like product generated by copolymerizing isobutylene with a small amount of isoprene. Butyl might be made in sheets, or combined with other elastomeric products to make sealers and also adhesives.
Butyl Finishing: an elastomeric coating system originated from polymerized isobutylene. Butyl finishes are char-acterized by low water vapor permeability.
Butyl Rubber: an artificial elastomer based on isobutylene and a small amount of isoprene. It is vulcanizable as well as features low permeability to gases and water vapor.
Butyl Tape: a sealer tape sometimes utilized between steel roof panel seams and finish laps; additionally made use of to secure other sorts of sheet steel joints, as well as in various sealant applications.
Camber: a small convex curve of a surface, such as in a prestressed concrete deck.
Cover: any type of looming or predicting roof framework, normally over entrances or doors. Often the severe end is unsupported.
Cant: a beveling of foam at a right angle joint for toughness as well as water run.
Cant Strip: a beveled or triangular-shaped strip of timber, wood fiber, perlite, or other material developed to act as a gradual transitional aircraft in between the straight surface area of a roof deck or inflexible insulation and a vertical surface area.
Cap Flashing: usually made up of metal, used to cover or shield the upper sides of the membrane base flashing, wall surface flashing, or main blinking. (See Flashing as well as Coping.).
Cap Sheet: a granule-surface coated sheet utilized as the leading ply of some built-up or customized bitumen roof membrane layers and/or flashing.
Capillary Activity: the activity that causes activity of fluids by surface area tension when touching two nearby surfaces such as panel side laps.
Caulking: (1) the physical procedure of securing a joint or time; (2) securing and making weather-tight the joints, joints, or gaps between nearby devices by filling with a sealer.
Cavity Wall: a wall surface built or prepared to supply an air area within the wall (with or without protecting product), in which the internal and outer materials 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 cleaned with tinted chalk. Made use of for placement functions.
Chalking: the deterioration or migration of an ingredient, in paints, layers, or various other products.
Chimney: stone, masonry, prefabricated steel, or a wood framed structure, having several flues, predicting with as well as over the roof.
Cladding: a product used as the outside wall enclosure check here of a building.
Cleat: a steel strip, plate or metal angle piece, either constant or private (" clip"), used 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 throughout the valley while shingles from the other side are trimmed back around 2 inches (51mm) from the valley centerline.
Closure Strip: a steel or resistant strip, such as neoprene foam, used to shut openings produced by signing up with steel panels or sheets and also flashings.
Coal Tar: a dark brownish to black colored, semi-solid hydrocarbon obtained as residue from the partial evapo-ration or distillation of coal tars. Coal tar pitch is more improved to satisfy the complying with roofing quality specs:.
Coal Tar Bitumen: a proprietary trade name for Type III coal tar made use of as the dampproofing or waterproof-ing agent in dead-level or low-slope built-up roof membrane layers, conforming to 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, adapting ASTM Spec D 450, Kind I or Kind III.
Coal Tar Waterproofing Pitch: a coal tar made use of as the dampproofing or waterproofing representative in below-grade structures, adapting ASTM Requirements D 450, Kind II.
Coated Base Sheet: a felt that has actually formerly been filled (filled up or fertilized) with asphalt and later covered with more challenging, extra thick asphalt, which greatly boosts its impermeability to moisture.
Covered Textile: textiles that have actually been fertilized and/or covered with a plastic-like product in the type of a remedy, diffusion hot-melt, or powder. The term additionally puts on products resulting from the application of a preformed movie to a textile using calendering.
Layered Felt (Sheet): (1) an asphalt-saturated really felt that has actually also been covered on both sides with tougher, extra viscous "finishing" asphalt; (2) a glass fiber felt that has actually been simultaneously impregnated as well as covered with asphalt on both sides.
Finishing: a layer of material spread over a surface for protection or decor. Coatings for SPF are usually fluids, semi-liquids, or mastics; spray, roller, or brush used; as well as treated to an elastomeric uniformity.
Cohesion: the degree of internal bonding of one substance to itself.
Cold Process Built-Up Roof: a continual, semi-flexible roof membrane layer, including a ply or plies of felts, floor coverings or various other support fabrics that are laminated along with alternating layers of liquid-applied (typically asphalt-solvent based) roof seals or adhesives installed at ambient or a slightly elevated temperature level.
Combustible: capable of burning.
Suitable Materials: 2 or even more compounds that can be combined, mixed, or affixed without separating, reacting, or influencing the products adversely.
Composition Shingle: a device of asphalt shingle roofing.
Concealed-Nail Technique: a technique of asphalt roll roofing application in which all nails are driven into the underlying training course of roofing and covered by an adhered, overlapping program.
Condensation: the click to read conversion of water vapor or various other gas to liquid state as the temperature goes down or atmos-pheric stress rises. (Additionally see Dew Point.).
Conductor Head: a shift part between a through-wall scupper and also downspout to accumulate and also direct run-off water.
Contact Cements: adhesives used to adhere or bond various roofing elements. These adhesives adhere mated parts instantly on contact of surface areas to which the adhesive has actually been used.
Contamination: the process of making a material or surface unclean or unsuited for its intended purpose, usually by the enhancement or attachment of unfavorable international compounds.
Coping: the covering item in addition to a wall surface which is exposed to the weather condition, usually constructed from metal, stonework, or stone. It is ideally sloped to shed water back onto the roof.
Copper: an all-natural weathering steel utilized in metal roofing; commonly made use of 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: formed metal sheeting secured on or into a wall, aesthetic, pipeline, roof system, or various other surface, to cover as well as shield the upper edge of the membrane layer base blinking or underlying metal flashing as well as associated fasteners from exposure to the climate.
Course: (1) the term utilized for each and 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 (e.g., a five-course wall surface blinking is composed of three applications of roof concrete with one ply of felt or fabric sandwiched in between each layer of roof concrete).
Protection: the surface area covered by a specific amount of a specific material.
Cricket: an elevated roof substratum or structure, built to draw away water around a chimney, visual, far from a wall surface, expansion joint, or other projection/penetration. (See Saddle.).
Cross Air flow: the effect that is offered when air steps with a roof dental caries between the vents.
Cupola: a fairly little roofed framework, usually established on the ridge or height of a primary roof area.
Curb: (1) a raised participant made use of to sustain roof penetrations, such as skylights, mechanical equipment, hatches, and so on over the level of the roof surface; (2) an elevated roof border fairly low in elevation.
Remedy: a process wherein a material is created to form irreversible molecular linkages by direct exposure to chemicals, heat, stress, and/or weathering.
Cure Time: the moment required to impact curing. The time needed for a material to reach its desirable lasting physical features.
Cutoff: a permanent information made to seal as well as protect against lateral water motion in an insulation system, as well as made use of to separate sections of a roofing system. (Note: A cutoff is different from a tie-off, which may be a short-lived or permanent seal.) (See Tie-Off.).
Intermediary: the open sections of a strip roof shingles in between the tabs.