They will require installation to an existing upstand/kerb or new builders kerb. We can offer any size available up to a 2400mm width (span). The length is supplied in 1000mm sections with variable end dimensions. Single, double or triple skin polycarbonate is available. Glazing options in clear, obscure, opal or bronze tints. The BVs are supplied with a Flat fixing flange. The widths of flanges start from 50mm minimum dimension. The product is supplied the fixings & tape. Other shapes such as pyramids & circular options are also available. These roof domes can meet current building regulations. Please check. AA fire rated & test for non-fragility.