large flat roof – new flat roof dorking. image image image image image. this year, i\u0027m thankful for closed-cell foam insulation yeah, that\u0027s right. all roofing works by km roofing edinburgh all materials supplied by polyglass uk km roofing edinburgh are members of the national federation of roofing . new flat roof chiswick. all photos courtesy halsall associates. duro-gard insulation previous next.