The newly bought rough roof is the roof but there is a section of the black bar on the ceiling that is not waterproof
(SBS) modified asphalt waterproofing membrane impregnated and coated with styrene-butadiene-styrene (SBS) thermoplastic elastomer modified asphalt. Polyester felt, fiberglass felt and Glass fiber reinforced polyester felt for the fetal base, the upper surface covered with polyethylene film, fine sand or mineral sheet material made of isolation materials can be curled sheet waterproof material.
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