Core TradesCâu 207 / 700
For window head flashing to work correctly with a water-resistive barrier, the barrier above the window must be lapped so that it:
a.Tucks behind the flashing at the bottom edge
b.Is sealed only with caulk over the flashing face
c.Is cut away entirely above the window
d.Overlaps the top of the flashing in shingle fashion so water drains outward
Giải thích
The weather barrier above the opening must lap over the top edge of the head flashing shingle-style so any water running down the wall is directed to the outside face. Tucking it behind, relying on caulk alone, or removing the barrier lets water get behind the flashing and into the wall.
Trích dẫn luật: 2025 CA Building Code, Chapter 14 (Exterior Walls)Luyện miễn phí toàn bộ 700 câu hỏi — không cần đăng ký.
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