| 9.27.8. |
Plywood |
| 9.27.8.1. |
Material Standards
- Plywood cladding shall be exterior type conforming to
- ANSI/HPVA HP-1, "Hardwood and Decorative Plywood,"
- CSA O121, "Douglas Fir Plywood,"
- CSA O151, "Canadian Softwood Plywood," or
- CSA O153, "Poplar Plywood."
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| 9.27.8.2. |
Thickness
- Plywood cladding shall be not less than 6 mm thick when applied directly to sheathing.
- When applied directly to framing or over furring strips, plywood cladding thickness shall conform to Table 9.27.8.2.
Table 9.27.8.2.
Minimum Plywood Cladding Thickness
Forming Part of Sentence 9.27.8.2.(2)
- The thickness of grooved or textured plywood cladding shall be measured at the point of least thickness.
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| 9.27.8.3. |
Edge Treatment
- The edges of plywood cladding shall be treated with a suitable paint or sealer.
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| 9.27.8.4. |
Panel Cladding
- Plywood applied in panels shall have all edges supported.
- Not less than a 2 mm gap shall be provided between panels referred to in Sentence (1).
- Vertical joints in cladding referred to in Sentence (1) shall be protected with batten strips or sealant when the plywood joints are not matched.
- Horizontal joints in cladding referred to in Sentence (1) shall be lapped not less than 25 mm or shall be suitably flashed.
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| 9.27.8.5. |
Lapped Strip Siding
- Plywood applied in horizontal lapped strips shall have not less than a 2 mm gap provided at the butted ends, which shall be caulked.
- The horizontal joints of siding described in Sentence (1) shall be lapped not less than 25 mm.
- Wedges shall be inserted under all vertical butt joints and at all corners when horizontal lapped plywood is applied without sheathing.
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