Roofing Construction and Estimating Flashcards

1
Q

Formula for slope of a roof?

A
  1. Rise \ Run.
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2
Q

Although not always necessary, solid roof sheathing is recomdnded for installation of shakes or wood shingles when the outide temperature is _________degrees F or colder

A
  1. 0 degrees.
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3
Q

Widest board recommended for soldi roof sheathing?

A
  1. 1” x 6”
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4
Q

Spacing of wood shingles when installed on non-continusus sheathing?

A
  1. 1” x 4” nominal dimension and spaced on center equal to weahter exposure.
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5
Q

At an eave end, drip edge is installed?

A
  1. Under the felt.
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6
Q

Agency that dtermines the fire rating for asphalt roofing?

A
  1. UL (underwriters labrartory).
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7
Q

Approximate pounds of nails required per square of asphalt shingles?

A
  1. 2.5 pounds.
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8
Q

Recommended procudure for installing roll roofing?

A
  1. When temp is above 45 degrees otherwise cut shorter lenghts and roll out under the sun.
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9
Q

Overlap for metal cap overlap over a field tile?

A
  1. 3”
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10
Q

Type of flashing used for open valleys on slate roof?

A
  1. 15” copper or .0179 zinc coated.
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11
Q

The weight of a coated vapor retarder for a built-up roof is usually about 45 to _______ pounds per square.

A
  1. 80 pounds.
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12
Q

Pounds of asphalt bitumen required per square between felts with an application tolerance of plus or minus 15 percent is: _________?

A

301: 25 pounds.

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13
Q

The most common type fo asphalt?

A
  1. Type III - Steep.
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14
Q

Max temeprature to which you can heat type III asphalt?

A
  1. 475 degrees.
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15
Q

Flash point for asphalt roofs?

A
  1. 437 degrees to 500 degrees.
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16
Q

The purpose of surface aggregate for BUR system is true for all of the following, except: IT DOES NOT: _______________?

A
  1. Cause the roof to SAG.
17
Q

Life expectancy of a properly installed aggregate-surface BUR system is __________ years.

A
  1. 20 Years.