2 layers 12.5mm plasterboard vapour control layer facing brickwork breather membrane 5mm min. resilient flanking strip installed at perimeter and turned under skirting board 22mm min. t&g flooring board on top of 19mm plasterboard 70mm min. FFT1 resilient composite deep battens wall ties securing external cladding to steel frame 25mm min. mineral wool quilt 22mm min. wood based board air tightness barrier around joists, lapped with vapour control layer insulated cavity barrier 90mm rigid insulation fixed to outer face of steel studs 100mm min. mineral wool quilt insulation 25mm min. proprietary metal resilient ceiling bars at right angles to beams 225mm min. deep UltraBEAM metal joists 2 layers 12.5mm plasterboard S-G4 STEEL FRAME WALL STEEL COMPARTMENT FLOOR External wall to meet min. U-Value 0.18 W/m²K. Insulation thickness and specification based on project requirements. All steel frame construction and connections should be designed by an engineer - all details subject to specific design. Separating floor drawn in accordance with Part E Robust Details E-FS-2. Consult Building Regulation Part E or Robust Details for further alternative. Cavity barrier reduces flanking sound and air circulation within the cavity. They are also required to withhold the passage of smoke and fire. Cavity barriers need to be fitted tightly, with no gaps however they can sometimes be omit if using fire class A1 full fill mineral wool insulation.
