Core TradesCâu 202 / 700
Proper flashing where a masonry chimney passes through a sloped roof generally consists of:
a.A single continuous sheet wrapped around the chimney
b.Only sealant applied at the roof-to-chimney joint
c.Roofing cement troweled over the shingles
d.Base (apron and step) flashing combined with counter (cap) flashing let into the masonry
Giải thích
Durable chimney flashing uses base flashing on the roof plane plus counter (cap) flashing set into the masonry joints to overlap it, so water is shed at two layers. A single wrap, sealant alone, or roofing cement over shingles cannot accommodate movement and will eventually leak.
Trích dẫn luật: 2025 CA Residential Code, Chapter 9 (Roof Assemblies)Luyện miễn phí toàn bộ 700 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- A roof has 2,400 square feet of surface area to be covered with three-tab asphalt shingles. At 3 bundles per square (100 sq ft), how many bundles are needed before adding any waste allowance?
- Where a sloped shingle roof meets a vertical sidewall, the flashing that is woven in shingle-by-shingle to direct water onto the roof surface is called:
- Standard three-tab asphalt shingles are typically installed with a common weather exposure of about:
- A roof plane rises at a 5:12 slope over a horizontal run of 15 feet. What is the vertical rise?
- For an enclosed attic without a vapor retarder or balanced venting, the net free ventilating area must generally be at least what fraction of the vented attic floor area?
- To completely fill the cavity of a nominal 2x6 wood-framed exterior wall, which batt insulation R-value is most typically specified?
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