Finish TradesCâu 410 / 700
Before installing solid hardwood strip flooring over a concrete slab on grade, which precaution is MOST critical?
a.Verifying the slab moisture level is within the flooring manufacturer's limits and installing a vapor retarder
b.Wetting the slab thoroughly the day before
c.Installing the boards with no expansion gap at the walls
d.Nailing directly into the concrete without a subfloor
Giải thích
Excess slab moisture is the leading cause of hardwood cupping and failure, so verifying moisture within the manufacturer's limits and providing a vapor retarder is critical. Wetting the slab, omitting the perimeter expansion gap, and nailing into bare concrete all invite moisture damage or movement problems.
Luyện miễn phí toàn bộ 700 câu hỏi — không cần đăng ký.
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