BC chapter 11 Flashcards
gable roofs
two inclined surfaces that meet at their high side to form a ridge
hip roof
style that slopes in four directions and has a degree of slope as to the gable roof
gambrel roof
slope in two directions,but there will be a break in the slope on each side
mansard roof
has a break in the slope of the roof on all four sides.
butterfly roof
roof style that slopes on two directions-basically two shed roofs that meet at their eaves
monitor roof
a raised central section of the roof extends several feet above the surrounding roof surface….the side of the monitor section which is normally windows are known as “clerestoties”
monitor roof
a raised central section of the roof extends several feet above the surrounding roof surface….the side of the monitor section which is normally windows are known as “clerestoties”
sawtooth roofs
a style also once used on industrial buildings for light and ventilation
common roofs styles
shed….arched….flat
common dormer styles
gable
hip
deck
flat roof
shed
conventional roof framing components
rafters
ridge boards
collar ties
ceiling joists and rafter ties
corrugated steel used for roof decking
ranges from 29 gauge .the thinnest, to 12 gauge , the thickest with overall depth varies from 3/4 to 2 inches
flat roof component layers (bottom to top)
roof deck
vapor barrier
insulation
membrane
drainage layer
wear course
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wood shingles are installed
with an overlap so only one-third of the surface of the shingle is actually exposed to the weather
Fire rating of roof coverings
class A…effective against severe fire exposure
class B…effective against a moderate fire exposure
class C…effective against a light fire exposure
