Finish TradesCâu 408 / 700
When setting ceramic tile over a wet area such as a shower wall, which backing material is the BEST choice directly behind the tile?
a.Standard paper-faced gypsum wallboard
b.Untreated plywood
c.Cement backer board with a suitable water-resistive membrane
d.Oriented strand board (OSB)
Giải thích
A cement backer board combined with an approved water-resistive or waterproof membrane provides a stable, moisture-tolerant substrate for tile in wet areas. Standard gypsum wallboard, untreated plywood, and OSB all degrade with sustained moisture and are unsuitable directly behind shower tile.
Luyện miễn phí toàn bộ 700 câu hỏi — không cần đăng ký.
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