| 9.26.6. |
Underlay beneath Shingles |
| 9.26.6.1. |
Materials
- Except as required in Sentence (2), when underlay is used beneath shingles, it shall be
- asphalt-saturated sheathing paper weighing not less than 0.195 kg/m2, or
- No. 15 plain or perforated asphalt-saturated felt.
- Underlay used beneath wood shingles shall be breather type.
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| 9.26.6.2. |
Installation
- When used with shingles, underlay shall be installed parallel to the eaves with head and end lap of not less than 50 mm.
- The top edge of each strip of underlay referred to in Sentence (1) shall be fastened with sufficient roofing nails to hold it in place until the shingles are applied.
- The underlay referred to in Sentence (1) shall overlap the eave protection by not less than 100 mm. (See Article 9.26.10.2. for underlay beneath wood shakes.)
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