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Min slope requirement for wood roofing systems? -
Answer-4:12 and greater
On closed cut valleys, shingles are installed on one side of
the valley, while shingles on the other side are cut how
short of the center line? - Answer-2 inches
Minimum thickness for galvanized steel in an open valley
within an asphalt shingle roof system? - Answer-26 gauge
45 mph winds will raise water how far vertically up a wall?
- Answer-1 inch
At what chimney width is a cricket recommended over
backer flashing? - Answer-24 inches and greater
For a thermoset membrane, new fasteners should be
patched how far beyond the plate? - Answer-3 inches
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How far should a fastener be kept from the center of the
valley? - Answer-8 inches
How many pounds per cubic feet does water weigh? -
Answer-52.4lbs/cf
Temperature at which bitumen is heated to the proper
viscosity? - Answer-560 degrees Fahrenheit
In order to achieve a perm rating of 0, how many
moppings of hot asphalt are required over two plies of
fiberglass ply felt? - Answer-2-3
How many pounds of nails per square are required when
installing asphalt shingles? - Answer-2.5lbs/SQ
What is the estimated coverage rate when figuring 2-plys
of underlayment? - Answer-50 sq. ft. per square
What length of clearance is needed between mechanical
units, parapets, and wall drains? - Answer-2 ft.
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How far should you clean past the effected area when
patching a BUR? - Answer-18 inches
What size step flashing is recommended by the NRCA for
wood shingles? - Answer-7" Long x 8" Wide
Most common dimension for architectural (strip shingles)?
- Answer-12" x 36"
Wood panels with a span rating of 32/16? - Answer-Panel
may be used for roof decking supports up to 32 inches OC
and for subflooring over supports up to 16 inches OC.
Adhesive set tile roof systems require how many layers of
underlayment? - Answer-2
Adhesive set tile roof systems require how long of an end
lap? - Answer-4 inches
What is the lowest flashpoint at which vapors will ignite a
combustible substance? - Answer-25 degrees Fahrenheit