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Lmatting was 450gr, cure it grp roof.

He basically put Osb, then resin then matting ( no bandage ) then resin, when it dried he sand it , then applied resin again. Then when it dried sanded it applied topcoat. When topcoat was dry he sanded it and applied topcoat. Then sanded it when it dried and applied topcoat again.

Thank you for quick response. He applied resin. My concern mostly about bandage along Osb joints before laminating. As it was not t&g Osb.

hello, we recently changed the flat alsphalt roof with GRP system. the builder used OSB 3 but not T and G. He also did not apply bandage inbetween the joints. However, he applied two times resin on top of laminate/mat and three times topcoat (he sanded every time he applied the coat). will it...