ROOFING NC BUILDING Exam Study Materials - Complete Solutions Updated

ROOFING NC BUILDING Exam Study Materials - Complete Solutions Updated What type of roofing material requires an open valley? - answer - Wood shingle or wooden shake What is the formula for figuring the slope of a roof? - answer - Rise divided by run The roof slope factor for a 5/12 roof slope is? - answer - 1.083 It is recommended that you install shakes or wood shingles over solid sheathing when the average expected low temperature will be below: - answer - 0 degrees F What is the widest board recommended for solid roof sheathing? - answer - 6" What is the proper spacing of wood shingles when installed on non-continuous (open or spaced) 1 x 4 sheathing? - answer - Boards are spaced on center a distance equal to single exposure The purpose of underlayment for sloping roofs does not include which of the following? - answer - It serves as vapor barrier How is drip edge installed at an eave end? - answer - Under the felt What is drip edge attached to? - answer - The roof deck The underlayment on a roof should lap? - answer - 2" on the edge and 4" at the ends When water backs up under shingles and begins leaking into ceilings as a result of freeze/thaw cycles of snow this is know as? - answer - An ice dam What is not a method used for ice protection of asphalt and fiberglass roofing? - answer - One layer of 90 lb hot mopped based membrane Where is the most likely place an asphalt shingle roof will leak? - answer - In the valley What is the name of the agency that determines the fire rating for asphalt roofing? - answer - UL (Underwriters Laboratories) How many nails are typically required for a three-tab asphalt shingle? - answer - 4 When using roll roofing the starter strip should be nailed so that it overhangs the edge by how many inches? - answer - 1/4" Where are the nails on an asphalt shingle ridge cap placed? - answer - 1 inch from edge and 5 1/2 inches from the end On a roof area what is the raised area around the upper side of a chimney called? - answer - A cricket or saddle What is counterflashing? - answer - Vertical flashing bent over the top of base flashing What is the proper installation technique for step flashing where a sloping roof meets vertical siding walls? - answer - Installing step flashing over a shingle so the next course covers it completely Approximately how many pounds of nails are required per square for asphalt shingles? - answer - 2 1/2 lbs When nailing down asphalt shingles you must always: - answer - Drive the nail straight If the exposure of three-tab 12 inch wide fiberglass shingles is five inches the head lap would normally be ______ inches. - answer - 2 What is the recommended procedure for installing roll roofing? - answer - Install when temperature is above 45 degrees if below 45 degrees cut into shorter lengths and let it warm in the sun How many bundles are in a square of Blue Label cedar shingles? - answer - 4 The sidelap or offset for wood shingles or shakes should be how many inches? - answer - 1 1/2" How much do concrete tiles weigh per square? - answer - 900 lbs What type of flashing is used for open valleys on a slate roof? - answer - 15" copper or .0179 zinc coated What is the minimum end lap for metal roofing panels? - answer - 6 inches The weight of a coated vapor retarder for a built-up roof is usually between: - answer - 45 to 80 lbs per square How many pounds of asphalt bitumen is required per square between felts with an application tolerance of plus or minus 15 percent? - answer - 25 lbs What is the minimum overlap for the base sheet on a four-ply BUR (built-up roof) system? - answer - 3 inches How do you seal the seams of the underlayment on a BUR (built up roof)? - answer - Hot mop it What is the flash point for asphalt roofs? - answer - 437-500 degrees What is the maximum temperature to which you can heat TYPE III asphalt? - answer - 475 degrees F What is the minimum temperature to soften Type I asphalt roofing? - answer - 135 degrees to 1