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Related Flashcards
Cards In This Set
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What is the primary purpose of a roof?
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To protect the building from rain, snow, sun and wind.
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What are the two main categories of a roof system?
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Sloped and flat roofs.
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What is the difference between a sloped and flat roof?
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The slope or pitch.
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How is a slope described?
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The vertical rise over a set horizontal run.
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What is considered a sloped roof?
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A slope greater than 4 in 12.
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Flat roofs have a slope of?
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Less than 2-in-12.
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How are asphalt shingles historically classified?
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By weight.
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What is organic felt?
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Asphalt roofing base material manufactured from cellulose fibers.
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What is pitch?
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Degree of roof incline expressed as the ratio of the rise, in feet, to the span, in feet.
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What are plates?
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Horizontal wood members that provide bearing and anchorage for walls, floor, ceiling, and roof framing.
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What is ponding?
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When water accumulates on roof surface that is incompletely drained.
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What is a purlin?
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Timber laid horizontally to support common rafters of a roof.
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What is racking?
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Roofing application method in which shingle courses are applied vertically up the roof, rather than across and up. Racking is not a recommended procedure.
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What is a rafter?
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Supporting framing member immediately beneath the deck or furring strip, sloping from the ridge to the wall plate.
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What is rake?
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Inclined edge of a sloped roof over a wall.
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