E18MCFF12 Party Wall Between Dwellings Build Up External Masonry Cavity Wall Masonry Outer Leaf (λ = 0.77) 100mm Aircrete Block Inner Leaf (λ = 0.19 W/mK) Full Fill Insulation 2 x 100mm Aircrete Block (0.19W/m²K) Party (Separating) Wall 100mm cavity fully filled with insulation (0.044W/Mk) Architect downloads e18mcff12_cad_file.dwg61.97 KB Registered Detail certificates e18mcff12_certificate.pdf584.18 KB rcd_worksheet_206.pdf340.6 KB