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Definition of Base sheet
1. Noun. (context: roofing) an impregnated, saturated, or coated felt placed as the first ply in some low-slope roof systems. ¹
¹ Source: wiktionary.com
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1. Noun. (context: roofing) an impregnated, saturated, or coated felt placed as the first ply in some low-slope roof systems. ¹
¹ Source: wiktionary.com