P4MCFF2 Separating wall and roof with insulation at ceiling level Build Up Masonry Party Wall Separating Wall and Roof 2 x Leaves Dense Blockwork to Party (Separating) Wall Cavity fully filled with insulation 400mm Insulation (λ = 0.044W/mK) at Ceiling Level Architect downloads p4mcff2_cad_file.dwg220.84 KB Registered Detail certificates p4mcff2_certificate_1.pdf627.69 KB rcd_worksheet_58.pdf301.44 KB