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Roofing


Quiz Questions

1.A large proportion of early roof failures are flashing failures, the regular inspection of flashings is of vital importance.
True
False
2. Figure 6 in chapter 3 shows what happen when:
The nails are placed too high on an asphalt shingles roof.
Fail to broom felts smoothly behind the mop, resulting in poor adhesion, wrinkles and buckles.
3. The function of flashings is to provide a waterproof junction between roof sections, their importance, and the importance of maintaining them properly.
True
False
4. Built-up roofing is a membrane built-up on the job from alternate layers of bituminous-saturated or saturated and coated felt or fabric and bitumen.
True
False
5.Built-up roofs are not just for flat roofs (2 inches and less per foot) they are also used in steep slope roofs.
True
False
6.The layer of felts in a built-up roof function primarily to hold the layers of bitumen in place. Generally felts do not materially contribute to the waterproof ness of the roof and are not suitable for exposure to weather.
True
False
7.3-ply and 5-ply roofs contain 3 and 5 plies of felt respectively.
Ture
False
8.Aggregate surfacing for the built-up roofs serve which one of the following important functions.
They permit the use of thick surface coating of bitumen.
They protect the bitumen from sunlight and heat.
They increase the heat and fir resistance of the roofing.
All of the above
9.Severe hailstorms may damage asphalt-shingles roofs beyond repair, particularly if the shingles have been exposed for a number of years (Chapter 5, fig. 30). With such damage both layers of shingles are broken, the roof will leak severely and roofing is mandatory.
True
False
10. Tile roofs are extremely heavy, ranging in weight from 800 to 1800 pounds per square; consequently, they require very strong framing to support them.
Ture
False
11. For tile roofs where winds of hurricane intensity are expected, consideration should be given to reinforcing tile roofs by laying all field tiles in Portland cement mortar.
True
False
12. The standard exposure for a 16 inches wood shingle is:
5 inches
5 ½ inches
7 ½ inches
13. In metal roofs, buckling of metal sheets, tearing at seams, loosening or pulling through of fasteners are common failures caused by inadequate provisions for expansion and contraction.
True
False
14. The function of a flashing is to provide a water-tight junction between the roofing material and other parts of the structure, and between roof sections.
True
False
15. The majority of the leaks on the roof are caused at the flashing joints.
True
False