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AlgaeRooftop fungus that can leave dark stains ~ above roofing.
Angled FastenersRoofing nails and staples driven into the decks at angles no parallel to the deck.
Apron FlashingMetal flashing offered at chimney fronts.
AlligatoringShrinkage cracked of the bituminous surface of built-up or smooth surface ar roofing, producing a patter that deep cracks resembling an alligator hide.
AsphaltA bituminous waterproofing agent offered in various species of roofing materials. The is a very viscous hydrocarbon developed from the residuum left after ~ the distillation of petroleum.
Asphalt Concrete PrimerAsphalt based primer provided to all set concrete and metal because that asphalt sealant.
Asphalt Plastic CementAsphalt based sealant material, meeting ASTM D4586 kind I or II. Provided to seal and also adhere roofing materials. Also referred to together mastic, blackjack, roof tar, and bull.
ASTMThe American culture for Testing and Materials. Organization that sets criter for a wide selection of materials, including roofing.
BallastAn anchoring material (such as rock, gravel, pavers) offered to resist wind uplift pressures of roof membrane.
Base FlashingBase flashing creates the upturned edges of watertight membrane.
BattenCommonly described as purlins. Battens are typically 1”x2”x4” hardwood strips nailed to the roof decking or rafters for the roofing product to it is in attached to. This is to provide a secure basic to anchor the roofing materials to since OSB will host screws efficiently.
Blister / BlisteringA spongy raised portion of roofing membrane together a result of push from entrapped waiting or water vapor. In shingles blisters are led to by either moisture under the material or moisture trapped within the material.
Blow-OffsWhen shingles are subjected to high winds, and are compelled off a roof deck.
BucklingWhen a wrinkle or ripple affect shingles or their underlayments.
Built-up roofing (BUR)A continuous semi functional roof spanning consisting of laminations or plies of saturated or coated felts alternated with layers the bitumen.
Cant StripA consistent strip of triangular cross-section, fitted right into the angle developed by a structure deck and a wall or other vertical surface, and also used to administer gradual shift for base flashing and also horizontal roof membrane.
CaulkTo fill a joint with mastic or asphalt cement to stop leaks.
Class “A”Highest fire-resistance rating for roofing. Indicates that roofing material is able to withstand severe exposure to fire originating indigenous sources exterior the building.
Class “B”Fire-resistance rating that indicates roofing materials are may be to resist moderate exposure come fire originate from sources external the building.
Class “C” Fire-resistance rating that shows roofing products are maybe to withstand light exposure come fire originating from exterior the building.
Closed reduced ValleyA shingle sink installation an approach where one roof plane’s shingles totally cover the others’s. The op layer is reduced to match the sink lines.
Collar/BootPre-formed flange placed over a vent pipeline to seal the roof about the vent pipeline opening. Likewise referred to together a pipe boot.
Counter FlashingThe metal or siding product that is mounted over the roof-top base flashing systems. Counter flashing is installed on the exposed edges and also joints the the base flashing to stop water from moving behind the base flashing.
CrackA rest in a roofing membrane together a an outcome of flexing, often emerging at a ridge or wrinkle.
Cricket A peaked water diverter set up behind chimneys and other huge roof projections. Efficiently diverts water around projections and prevent ice accumulation of snow and also ice.
CuppingWhen shingles are improperly mounted over an existing roof or space over-exposed, lock may type a curl or cup. May additionally be as result of a production defect.
DeckThe substrate end which roofing is applied. Typically plywood, hardwood boards, or planks. A advertising roof deck may consist of metal or concrete.
DormerA raised roof prolonging out of a bigger roof plane.
Drip EdgeAn installed lip that keeps shingles up turn off the deck at edges, and extends shingles the end over eaves and gutters, and prevents water native returning ago into roof. Prolongs life-expectancy the fascia and exterior finishes.
EPDM (Ethylene Propylene Diene Monomer)A man-made rubber sheet provided in solitary ply roof membrane.
Expansion JointA intended separation of two roof areas to allow expansion and also contraction motions of the parts.
EavesThe roof edge indigenous the fascia to the structure’s outside wall. Typically the very first three feet across a roof. This is the security overhang in ~ the lower edge the a sloped roof.
EWAEngineered hardwood Association, Tests and also sets requirements for all ranges of plywoods used in the U.S.
ExposureArea’s top top a roof that are exposed to natural elements.
FasciaThe finish member covering the leaf or eaves that a flat or sloping roof or roof overhang.
FastenersNails or staples used to for sure roofing come the deck.
FeltA functional sheet that is saturated through asphalt and also used together an underlayment, sometimes called “tar paper.”
Fiberglas MatFibers that are wove and also condensed right into strong, long lasting mats for usage in various roofing materials.
FishmouthAn opened of the lapped sheet of used felt in built-up roofing due to adhesion failure.
FlangeMetal pan prolonging up or down a roof slope roughly flashing pieces. Generally at chimneys and also plumbing vents.
FlashingMaterials provided to waterproof a roof around any kind of projections. Connecting tools that seal membrane joints, drains, gravel stops and other places where membrane is interrupted.
Flashing CementSealant designed for use around flashing areas, generally thicker 보다 plastic cement.
GableThe upper part of a sidewall that comes to a triangular point at the ridge of a sloping roof. Trim the goes on this part of a roof is dubbed gable or rake trim.
Gable RoofTraditional roof style where two roof planes meet a ridge line of equal size. Includes a gable each end.
Gambrel RoofA type of roof containing 2 sloping planes of different pitch on each side that the ridge. The lower plane has a steeper slope 보다 the upper. Consists of a gable at each end.
GranulesCrushed rock the is coated through ceramic coating and also fired, used as height surface ~ above shingles.
Gravel StopFlanged device, typically metallic, designed to prevent loose aggregate indigenous washing turn off roof. It also provides a perfect edge detail for built-up roofing assembly.
Hand-SealingThis technique is provided on an extremely steep slopes, high wind areas, and when installing in cold weather come ensure the a appropriate seal is made.
High NailingWhen shingles space nailed or fastened above the manufacture’s specified nail location.
HipThe inclined exterior angle formed by the intersection of two sloping roof planes. Runs from the ridge come the eaves.
Hip LegsThe down-slope ridges on hip roofs.
Hip RoofA roof with 4 roof planes coming together at a peak and four separate hip legs. This kind of roof does no contain a gable.
Ice Dam When a snow load melts top top a roof and re-freezes in ~ the eave areas. Ice dams force water come back-up under shingles and also cause leakage. Ice cream dams might be led to by a roof without suitable ventilation.
Intake Ventilation The part of a ventilation device used to attract fresh waiting in. Usually vents installed in the soffit or along the eaves that a building.
L-FlashingContinuous metal flashing consists of numerous feet that metal. Used at horizontal walls, pre-fabed to resemble the letter L.
Laminated ShinglesShingles made form two separate pieces that are laminated together. These shingles are likewise referred to together dimensional and/or architecture shingles.
Laps / Lap SeamsThe areas on a roof where roll roofing materials (including underlayments) overlap one an additional when installed.
Lean-to RoofA roof v one slope just that is built against a higher wall.
Low slope ApplicationsMethods of installing roofing product on roof slopes between 1-2 inches per foot.
Low SlopesRoof pitches much less than 4/12 space generally considered low sloped roofs. Only specific roofing applications have the right to be applied on roofs through slopes the 2/12 – 4/12. Normally shingles have the right to not be mounted at slopes much less than 2/12 (varies through city/county building code requirements).
MansardA roof design with a nearly vertical roof plane that ties right into a roof plane of less slope in ~ its peak. This form of roof contains no gables.
MatsBase product of shingles and certain rolled roofing products.
Modified BitumenAsphalt v the addition of polymer modifiers to boost cold temperature flexibility and also warm temperature flow resistance and stability. Reinforcement product is made of polyester or fiberglass.
Nail overview LinePainted line on laminated shingles, to assist in suitable placement that fasteners.
Nail-PopWhen a pond not fully driven into roofing material and sits up off the roof deck.
NestingInstalling a second layer of shingles aligning coursed through the initial roof to stop shingle cupping.
Open ValleyValley mounted using steel down the middle of the valley of the roof.
Organic MatMat product made native recycled wood pulp and also paper.
Organic ShinglesShingles room made from organic (paper) mats.
OSBOriented Strand Board. A decking made from timber chips and lamination glues.
OverdrivenThe term supplied for fasteners thrust through roofing material with too much force, break the roofing material/materials.
OverexposedInstalling shingle coursed greater than their intended exposure.
OverhangThe part of the roof framework that extends beyond the exterior walls of a building.
PVC (Poly Vinyl Chloride) A share term for single ply plastic sheet membrane. The seams space fused by solvent or hot-air welding techniques.
Parapet The component of the wall entirely above the roof.
PitchRefers to the incline ~ above the roof. The number of inches climb per 12 customs horizontal. Example: 2/12 method that there is two (2) inches climb per twelve (12) inch horizontal.
Plumbing Vent FlashingPrevents rainwater from running right into holes reduced for pipe in the roof. This flashing is offered according to the dimension of the vent pipe and the roof angle. Roofing material is mounted over the flashing.
PlywoodPlywood is regularly used for roof decks. It is a strong, durable and lightweight hardwood material. The thickness of plywood counts on the spacing that the rafters.
PondingThe arsenal of water in shallow pools top top the roof surface.
PurlinHorizontal lengths of material, hardwood or metal, that space affixed to the roof and also to i beg your pardon the perfect roofing material is enclosed to.
Rake EdgeThe vertical edge that gable style roof planes.
RecoverThe surroundings of a brand-new roof mechanism over an existing mechanism without removing the currently roofing system. Described as an overlay.
Re-roofingInstalling a new roof mechanism on an existing framework that is not newly built.
Ridge The horizontal line developed by the juncture of 2 sloping planes, particularly the line developed by the surface at the optimal of a roof.
Rigid VentHard plastic ridge vent material.
RiseThe vertical street from the eaves line to the ridge.
Roof LouversRooftop rectangle-shaped shaped roof vents. Additionally called box vents, mushroom vents, airhawks, soldier vents.
Roof PlaneA roofing area characterized by having four separate edges. One next of a gable, hip, or mansard roof.
RunThe horizontal distance from the eaves come a suggest directly under the ridge. One half the span.
Self-SealantSealant set up on shingles. ~ installation, heat and also sun will activate sealant to seal the shingles to each other.
SelvageThe no exposed room on rolled roofing there is no granules. Designed because that installation come sealant.
SheathingExterior class boards supplied as a roof deck material.
Shed RoofRoof structure of single roof plane. The is an area the doe not tie into any kind of other roofs. Does no contain any kind of hip, ridges, valleys or gables.
Side LapsThe area on rolled roofing product where one role overlaps the rolled product beneath it. Likewise called the selvage sheet on rolling roofing.
Side wall surfaces Area where a vertical roof aircraft meets a vertical wall. Such as on the political parties of dormers, etc.
SlopeThe ratio in between the steps of the rise and also the horizontal span.
SoffitThe complete on the underside that a roof overhang.
Soffit Ventilation input ventilation installed under the eaves, or at the roof edge.
SpanThe horizontal street from eaves come eaves.
Starter strip This the an initial course that roofing installed on a new asphalt roof. This is sometimes trimmed indigenous the main roof material.
Steep slope RoofingGenerally all slopes/pitches higher than 4/12 are described as steep slopes.
Step Flashing Metal flashing pieces installed at sidewalls and chimneys because that waterproofing.
SquareOne roofing square is equal to 100 square feet – 10’ x 10’ area.
TabThe bottom part of a timeless shingle separated by the shingle cut-outs.
Tear-OffRemoval of existing roofing materials on roof under to the deck. This has removing present underlayment.
TelegraphingWhen shingles display signs the unevenness due to the underlayment or existing shingles beneath them.
Tongue and GrooveIf a roof deserve to be checked out on the underside such as from an internal ceiling view, tongue and groove is used in ar of plywood or OSB. The is a wood decking that provides an excellent insulation without additional rigid roof insulation in moderate climates.
TransitionsWhen a roof airplane ties into an additional roof plane that has actually a different pitch or slope.
UnderdrivenDescription for a fastener that is not totally drive do the washing up to the shingle surface.
UnderlaymentsAsphalt based rolled products designed come be installed under key roofing material to offer as added protection.
ValleyThe “V” developed where 2 sloping roofs meet. This is where two roofs sign up with at an angle.
VaporTerm used to explain moisture laden air.
VentAny outlet because that air that protrudes with the roof deck such as a pipe or stack. Any type of devise installed on the roof, gable or soffit for the purpose of ventilating the underside of the roof deck.
Warm WallThe finished wall surface inside of a structure, provided in roofing to determine how far up the deck to download waterproof underlayments at eaves.
WarrantyThe composed promise to the owner because that materials and labor.
Waterproof UnderlaymentsModified bitumen based roofing underlayments. Designed to seal to timber decks and waterproof an essential leaks areas.
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Woven ValleysThe method of installation valleys through laying one shingle end the other up the valley center.