Absorption: the ability of a material to approve within its body quantities of gases or fluid, such as dampness.
Accelerated Wear and tear: the procedure in which products are revealed to a regulated environment where various exposures such as heat, water, condensation, or light are become magnify their impacts, therefore accelerating the weathering process. The material's physical buildings are measured after this procedure and compared to the initial residential properties of the unexposed material, or to the residential properties of the product that has been subjected to natural weathering.
Adhere: to trigger 2 surface areas to be held together by attachment, normally with asphalt or roofing cements in built-up roofing and also with call concretes in some single-ply membrane layers.
Aggregate: rock, stone, smashed rock, crushed slag, water-worn gravel or marble chips utilized for appearing and/or ballasting a roof system.
Aging: the result on products that are revealed to a setting for an interval of time.
Alligatoring: the fracturing of the emerging asphalt on a built-up roof, generating a pattern of fractures similar to an alligator's conceal; the cracks may or might not expand with the appearing bitumen.
Light weight aluminum: a non-rusting metal often utilized for steel roofing and blinking.
Ambient Temperature: the temperature level of the air; air temperature.
Application Rate: the amount (mass, volume, or density) of material used each area.
Apron Flashing: a term used for a blinking situated at the time of the top of the sloped roof as well as an upright wall or steeper-sloped roof.
Architectural Shingle: roof shingles that offers a dimensional look.
Asphalt: a dark brownish or black material found in an all-natural state or, much more commonly, left as a residue after evaporating or otherwise refining crude oil or petroleum.
Asphalt Solution: a mixture of asphalt bits and an emulsifying agent such as bentonite clay and water. These elements are integrated by using a chemical or a clay emulsifying representative and blending or blending equipment.
Asphalt Felt: an asphalt-saturated and/or an asphalt-coated felt. (See Really Felt.).
Asphalt Roof Cement: a trowelable combination of solvent-based bitumen, mineral stabilizers, various other fibers and/or fillers. Categorized by ASTM Requirement D 2822-91 Asphalt Roof Concrete, and D 4586-92 Asphalt Roof Concrete, Asbestos-Free, Types I as well as II.
Attic: the tooth cavity or open room over the ceiling and instantly under the roof deck of a steep-sloped roof.
Back-Nailing: (likewise described as Blind-Nailing) the method of nailing the back section of a roofing ply, high roofing device, or other components in a way so that the bolts are covered by the following sequential ply, or program, as well as are not exposed to the weather in the ended up roof system.
Ballast: a securing material, such as accumulation, or precast concrete pavers, which utilize the pressure of gravity to hold (or help in holding) single-ply roof membranes in position.
Barrel Safe: a building account featuring a spherical profile to the roof on the brief axis, however without angle modification on a cut along the long axis.
Base Flashing (membrane layer base flashing): plies or strips of roof membrane material utilized to close-off and/or seal a roof at the roof-to-vertical crossways, such as at a roof-to-wall time. Membrane base blinking covers the edge of the area membrane. (Also see Blinking.).
Base Ply: the lowermost ply of roofing in a roof membrane layer or roof system.
Base Sheet: an impregnated, saturated, or coated really felt placed as the very first ply in some multi-ply built-up and changed bitumen roof membrane layers.
Batten: (1) cap or cover; (2) in a metal roof: a steel closure established over, or covering the joint between, adjacent metal panels; (3) timber: a strip of wood typically set in or over the architectural deck, used to elevate and/or connect a primary roof covering such as floor tile; (4) in a membrane roof system: a slim plastic, wood, or metal bar which is used to secure or hold the roof membrane layer and/or base blinking in place.
Batten Seam: a metal panel account attached to and developed around a diagonal timber or metal batten.
Asphalt: (1) a course of amorphous, black or dark tinted, (solid, semi-solid, or thick) cementitious sub-stances, all-natural or produced, made up primarily of high molecular weight hydrocarbons, soluble in carbon disulfide, and also found in petroleum asphalts, coal tars and also pitches, wood tars and asphalts; (2) a common term made use of to denote any type of product made up principally of asphalt, typically asphalt or coal tar.
Blackberry (often described as Blueberry or Tar-Boil): a small bubble or blister in the flood layer of an aggregate-surfaced built-up roof membrane.
Blind-Nailing: the use of nails that are not subjected to the weather condition in the ended up roof.
Sore: an encased pocket of air, which might be blended with water or solvent vapor, entraped in between imper-meable layers of felt or membrane, or between the membrane layer as well as substrate.
Blocking: areas of timber (which might be preservative treated) built right into a roof setting up, normally connected above the deck and also listed below the membrane or blinking, used to stiffen the deck around an opening, act as a stop for insulation, sustain an aesthetic, or to act as a nailer for add-on of the membrane layer and/or blinking.
BOMA: Structure Owners & Managers Organization.
Brake: hand- or power-activated equipment utilized to create steel.
British Thermal Unit (BTU): the heat needed to elevate the temperature level of one pound of water one level Fahrenheit (joule).
Brooming: an action executed to help with embedment of a ply of roofing product into hot asphalt by using a mop, squeegee, or special implement to ravel the ply and ensure call with the bitumen or adhe-sive under the ply.
Buckle: an upwards, lengthened tenting displacement of a roof membrane layer often occurring over insulation or deck joints. A fastening may be a sign of motion within the roof setting up.
Building ordinance: released guidelines and ordinances established by an acknowledged agency recommending layout lots, procedures, and building and construction information for structures. Normally putting on assigned territories (city, region, state, etc.). Building regulations regulate design, construction, and also high quality of materials, use as well as occupancy, area as well as upkeep of structures as well as structures within the area for which the code has actually been taken on.
Built-Up Roof Membrane (BUR): a constant, semi-flexible multi-ply roof membrane, containing plies or layers of saturated felts, layered felts, fabrics, or floor coverings between which alternate layers of bitumen are applied. Normally, built-up roof membrane layers are appeared with mineral aggregate and bitumen, a liquid-applied coat-ing, or a granule-surfaced cap sheet.
Bundle: a private bundle of trembles or shingles.
Butt Joint: a joint developed by nearby, different sections of product, such as where two neighboring pieces of insulation abut.
Button Strike: a procedure of caving in two or even more densities of metal that are pressed versus each various other to avoid slippage between the metal.
Butyl: rubber-like material produced by copolymerizing isobutylene with a small amount of isoprene. Butyl might be made in sheets, or combined with various other elastomeric materials to make sealers and adhesives.
Butyl Covering: an elastomeric layer system stemmed from polymerized isobutylene. Butyl finishes are char-acterized by low water vapor leaks in the structure.
Butyl Rubber: a synthetic elastomer based upon isobutylene and a small amount of isoprene. It is vulcanizable as well as includes low permeability to gases and water vapor.
Butyl Tape: a sealer tape often used between metal roof panel joints and also visit this site finish laps; also used to seal other kinds of sheet metal joints, and also in different sealer applications.
Camber: a small convex curve of a surface, such as in a prestressed concrete deck.
Cover: any overhanging or predicting roof framework, commonly over entries or doors. Sometimes the extreme end is in need of support.
Cant: a beveling of foam at a right angle joint for strength and water escape.
Cant Strip: a diagonal or triangular-shaped strip of timber, wood fiber, perlite, or other material made to function as a gradual transitional airplane between the horizontal surface area of a roof deck or inflexible insulation and also an upright surface area.
Cap Flashing: usually composed of steel, utilized to cover or protect the upper sides of the membrane base flashing, wall surface blinking, or key blinking. (See Flashing and Coping.).
Cap Sheet: a granule-surface layered sheet made use of as the top ply of some built-up or modified asphalt roof membranes and/or blinking.
Blood vessel Activity: the action that causes movement of fluids by surface tension when in contact with 2 surrounding surface areas such as panel side laps.
Caulking: (1) the physical process of sealing a joint or time; (2) securing as well as making weather-tight the joints, seams, or gaps in between nearby units by loaded with a sealant.
Cavity Wall: a wall surface constructed or prepared to give an air room within the wall surface (with or without shielding product), in which the internal and also external products are tied together by structural framing.
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 cable dusted with colored chalk. Utilized for placement purposes.
Chalking: the deterioration or migration of an ingredient, in paints, finishes, or various other products.
Chimney: stone, stonework, erected metal, or a timber framed framework, including one or more flues, predicting via and also over the roof.
Cladding: a material used as the outside wall room of a building.
Cleat: a steel strip, plate or steel angle item, either continuous or specific (" clip"), utilized to secure 2 or even more components together.
Closed-Cut Valley: an approach of valley application in which shingles from one side of the valley expand throughout the valley while shingles from the opposite are trimmed back roughly 2 inches (51mm) from the valley centerline.
Closure Strip: a metal or durable strip, such as neoprene foam, made use of to close openings produced by signing up with metal panels or sheets and flashings.
Coal Tar: a dark brown to black colored, semi-solid hydrocarbon obtained as residue from the partial evapo-ration or purification of coal tars. Coal tar pitch is further refined to satisfy the following roofing grade specifications:.
Coal Tar Asphalt: an exclusive brand name for Kind III coal tar made use of as the dampproofing or waterproof-ing agent in dead-level or low-slope built-up roof membranes, satisfying ASTM D 450, Kind III.
Coal Tar Pitch: a coal tar used as the waterproofing representative in dead-level or low-slope built-up roof mem-branes, adapting ASTM Specification D 450, Kind I or Type III.
Coal Tar Waterproofing Pitch: a coal tar utilized as the dampproofing or waterproofing agent in below-grade structures, adapting ASTM Spec D 450, Type II.
Coated Base Sheet: a really felt that has actually previously been saturated (loaded or fertilized) with asphalt as well as later coated with more web link challenging, much more viscous asphalt, which significantly enhances its impermeability to moisture.
Covered Textile: textiles that have been impregnated and/or coated with a plastic-like material in the type of a solution, dispersion hot-melt, or powder. The term also puts on materials arising from the application of a preformed movie to a fabric using calendering.
Covered Felt (Sheet): (1) an asphalt-saturated really felt that has actually additionally been coated on both sides with tougher, more thick "finish" asphalt; (2) a glass fiber really felt that has been concurrently impregnated as well as coated with asphalt on both sides.
Finishing: a layer of material spread over a surface area for protection or decoration. Coatings for SPF are typically liquids, semi-liquids, or mastics; spray, roller, or brush used; and treated to an elastomeric consistency.
Cohesion: the level of internal bonding of one substance to itself.
Cold Process Built-Up Roof: a continual, semi-flexible roof membrane, containing a ply or plies of felts, mats or various other support textiles that are laminated along with alternating layers of liquid-applied (usually asphalt-solvent based) roof cements or adhesives installed at ambient or a slightly raised temperature.
Combustible: with the ability of burning.
Compatible Materials: two or more materials that can be mixed, blended, or connected without dividing, reacting, or affecting the materials negatively.
Make-up Tile: a system of asphalt tile roofing.
Concealed-Nail Approach: a method of asphalt roll roofing application in which all nails are driven into the underlying course of roofing and covered by an adhered, overlapping training course.
Condensation: the conversion of water vapor or other gas to liquid state as the temperature level goes down or atmos-pheric stress increases. (Additionally see Humidity.).
Conductor Head: a change part in between a through-wall scupper as well as downspout to accumulate and direct run-off water.
Get in touch with Cements: adhesives utilized to adhere or bond different roofing parts. These adhesives adhere mated components quickly on call of surface areas to which the adhesive has actually been applied.
Contamination: the procedure of making a material or surface area dirty or inadequate for its designated purpose, have a peek at this site typically by the enhancement or attachment of undesirable international substances.
Coping: the covering item in addition to a wall which is revealed to the climate, normally made from metal, masonry, or rock. It is preferably sloped to shed water back onto the roof.
Copper: an all-natural weathering metal utilized in steel roofing; generally used in 16 or 20 ounce per square foot thickness (4.87 or 6.10 kg/sq m).
Cornice: the decorative straight molding or projected roof overhang.
Counterflashing: created steel sheeting secured on or right into a wall, visual, pipe, rooftop system, or various other surface, to cover and also secure the upper edge of the membrane layer base flashing or underlying steel blinking as well as linked fasteners from direct exposure to the climate.
Program: (1) the term made use of for each and every row of shingles of roofing material that develops the roofing, waterproofing, or blinking system; (2) one layer of a series of products put on a surface (e.g., a five-course wall surface blinking is composed of three applications of roof cement with one ply of felt or material sandwiched between each layer of roof cement).
Insurance coverage: the surface covered by a certain amount of a specific material.
Cricket: a raised roof substrate or framework, built to draw away water around a chimney, curb, away from a wall, development joint, or various other projection/penetration. (See Saddle.).
Cross Air flow: the effect that is supplied when air actions via a roof cavity between the vents.
Cupola: a relatively small roofed structure, usually established on the ridge or peak of a major roof location.
Suppress: (1) an elevated participant utilized to support roof penetrations, such as skylights, mechanical devices, hatches, etc. over the level of the roof surface; (2) an elevated roof border fairly reduced in elevation.
Cure: a process whereby a product is caused to develop irreversible molecular affiliations by exposure to chemicals, heat, stress, and/or weathering.
Heal Time: the moment called for to impact curing. The time required for a product to reach its preferable long-lasting physical attributes.
Cutoff: a long-term detail designed to seal as well as prevent lateral water motion in an insulation system, and also utilized to separate areas of a roof. (Note: A cutoff is various from a tie-off, which might be a temporary or long-term seal.) (See Tie-Off.).
Cutout: the open sections of a strip shingle in between the tabs.