Roof - Flat Roof - Timber - Input Required  help

Roof joist width

Roof joist depth

Roof joist centres

Finish/Insulation below joists

You can either select an insulation or enter the
target U-value you want to achieve below...

Insulation between joists Isover Frame Batt 32 50mmIsover Frame Batt/Roll 32 90mmIsover Frame Batt/Roll 32 140mmIsover Frame Batt 35 90mmIsover Frame Batt 35 100mmIsover Frame Batt 35 140mmIsover Frame Batt 35 150mmIsover Frame Batt 40 140mmIsover Frame Batt 43 90mmIsover Frame Batt 43 140mmIsover Frame Roll 35 90mmIsover Frame Roll 35 100mmIsover Frame Roll 35 140mmIsover Frame Roll 40 90mmIsover Frame Roll 40 140mm

or Target U-value  W/m²k