THERMAL BRIDGING GUIDE - An introductory guide to thermal bridging in homes

0.15 Window frame positioned flush with inside face of brickwork Cavity closer omitted PROBLEM TO AVOID PROBLEM TO AVOID Reducing the frame overlap to 0mm ψ Omitting the cavity closer makes ψ makes heat loss worse for jambs. [...] wall mineral wool insulation Dense aggregate 25mm perimeter blockwork insulation Low density lightweight aggregate blockwork (density up to 900 kg/m3) 12 NB: The PSI-values quoted in this Guide are for indicative purposes only and should not be used in SAP calculations PROBLEM TO AVOID PROBLEM TO AVOID Omitting cavity insulation below DPC ψ Omitting the floor perimeter ψ makes heat loss signif. [...] 300mm loft insulation Plasterboard Full fill party wall mineral Plasterboard on wool insulation Use a thermal plaster dabs laminate Dense aggregate plasterboard blockwork 20 NB: The PSI-values quoted in this Guide are for indicative purposes only and should not be used in SAP calculations PROBLEM TO AVOID FURTHER NOTES Stopping the wall cavity insulation ψ short makes heat loss significantly 0. [...] 140mm insulated timber frame panel with 9mm OSB sheathing Use a thermal laminate plasterboard reveal Frame overlap = 30mm 50mm cavity Brickwork Timber cavity closer 26 NB: The PSI-values quoted in this Guide are for indicative purposes only and should not be used in SAP calculations PROBLEM TO AVOID PROBLEM TO AVOID Reducing the frame overlap to 0mm ψ Omitting the cavity closer makes ψ makes h. [...] 0.09 Window frame positioned flush BLACK MOULD with inside face of BLACK MOULDPROBABLE PROBABLE brickwork Cavity closer omitted PROBLEM TO AVOID PROBLEM TO AVOID Reducing the frame overlap to 0mm ψ Omitting the cavity closer makes ψ makes heat loss worse for jambs.