Topic 2 – Apply Wood Shingles and Shakes

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Wood shingles/shakes are a more decorative roof covering and last longer than asphalt shingles. Wood shingles and shakes can be installed on solid or spaced sheathing. Layout is similar to asphalt shingles including the installation of drip edge and eave protection. A starter strip is made by doubling or tripling the first course at the eave to maintain an even profile. Underlay is required and applied between each course. The joints in adjacent courses are staggered.

For application information, review:

• Carpentry, Chapter 56 Wood Shakes and Shingles
• Canadian Wood Frame House Construction Chapter, p. 141 – 144 (Wood shingles and shakes)
• NBC sections – Wood Roof Shingles and Cedar Roof Shakes

Review Questions

1. Why are wood shingles laid 6 mm apart?
2. Flat grain shingles shall not be applied in widths exceeding 200 mm. Why?
3. Wood shingles should overhang the fascia board at the eaves by ______ mm.
4. How many layers should the starter course be?
5. What is the shingling hatchet used for when applying wood shingles and shakes?
6. If the shingles are bowed, apply the shingle with the bow (crown) up or down?
7. Shingling should start at the valley and work away in both directions. Why?
8. What is the reason for applying a strip of roofing felt between each course of shingles?
9. Wood shingles shall be not less than _____ mm wide nor more than _____ mm wide.
10. What is the maximum exposure of wood shingles when using 450 mm long shingles on a 4 in 12 roof slope using No. 2 grade material?
11. Shakes and wood shingles shall be nailed with _____ nails or staples located _____ mm from the sides of shingles and _____ mm above the exposure line.
12. Calculate how many bundles of wood shingles are required to shingle a roof which is 15’ long x 25’ wide on each side. Use 4 bundles for each 100 sq ft, and with 10% waste, starter course and ridge cap.

Answers:

1. To allow for expansion when the shingles get wet. This keeps the shingles from buckling.
2. Shingles wider than 200 mm will warp, cup, or crack.
3. 25 mm
4. Starter courses are doubled and sometimes tripled.
5. Gauge the rows of shingles for the correct exposure, trim the sides of shingles and shakes so the butt ends are kept aligned, and for nailing the shingles and shakes.
6. Crown up
7. To avoid ending up with small or narrow pieces in the valley
8. To catch any snow or water blown up under the shakes in a storm.
9. 75 mm, 350 mm (9.26.9.3)
10. 115 mm (Table 9.26.9.6)
11. 2 nails located 20 mm from the side of the shingle and 40 mm above the exposure line. (9.26.9.5)
12. 33 bundles.