Roofing Construction & Estimating Flashcards
What is counter flashing?
Flashing built into the vertical surface and bent down over the base flashing is called counter flashing
P.93
A wood shake or shingle roof is considered beyond repair when?
The cost of repair exceeds 80% of the replacement cost.
If the exposure of three tab, 12-in wide fiberglass shingles is 5 in, the headlap would normally be ________ inches
2in
P. 109
When using roll roofing the starter strip should be nailed so that it overhangs the edge by how many inches?
1/4”
Approximately how many pounds of nails are required per square foot for asphalt shingles?
Two and a half pound
2 1/2 lbs
What is drip edge attached to?
Roof deck
P. 41
What is the maximum temperature to which you can heat TYPE III asphalt?
475° F
How many nails are typically required for a three tab asphalt shingle?
4
What is the minimum end lap for metal roofing panels?
6”
P.248
The weight of a coated vapor retarder for a built-up roof is usually between:
45-80 pounds per square
When water backs up under shingles and begins leaking into ceilings as a result of freeze/ thaw cycles of snow, this is known as?
An ice dam
The underlayment on a roof should lap?
2 inches on the edge and 4 in at the ends.
To identify a roof leak?
Look for shingles that are worn, curled or damaged.
What is the proper installation technique for step flashing where a sloping roof meets vertical siding walls?
Installing step flashing over a shingle so that the next course covers it completely.
The life expectancy of a properly installed aggregated – surfaced BUR system is:
20 years
What is the recommended procedure for installing roll roofing?
Install when temperature is above 45°, if below 45°, cutting two shorter lengths and let it warm in the sun
How is drip edge installed at an Eve end?
Under the felt
By adding gravel to an aggregate – surface burr system, it does several important things. Which of the following below is a benefit of adding aggregate?
It protects the underlying roof system from the heating, drying and weathering effects of elements.
How do you seal the seams of the underlayment on a BUR built up roof system?
Hot mop it
What type of flashing is used for oven valleys on a slate roof?
15 inch copper, or .0179 zinc coated
How much do concrete tiles weigh per square?
900 lb
What is the proper spacing of wood shingles when installed on non – continuous ( open or spaced) 1x4 sheathing?
Boards are spaced on center A distance equal to the single exposure
What area are leaks most likely to occur with a wood shingle roof?
When joints line up and three adjacent courses
Where is the most likely place An asphalt shingle roof will leak?
In the valley
On a roof area, what is the raised area around the upper side of a chimney called?
P.93
Cricket or saddle
What is the most common type of venting for a hip roof?
Eve and ridge vents
What type of roofing material requires an open valley?
Wood shingle or wooden shake
What is the widest board recommended for solid roof sheathing?
6 in
An asphalt emulsion is applied to a bitumen roof with a slope of 4:12. How many gallons of material will be used to cover one square?
3 gallons
P.291
What is the correct way to repair an asphalt shingle?
Caulk an area with tar and sprinkle granules onto it.
In built up roofs, can’t strips. Shall extend how many inches of the vertical surface ?
5 in
What is the formula for figuring the slope of a roof?
Rise divided by run
How many bundles are in a square of blue label cedar shingles?
4
P.151 chart
