Non-exposed wood joist ceiling - insulation over uninsulated substrate
- Sub-floor board ≥ 13 mm
- GUTEX Thermosafe-homogen
- Vapour retarder/ Air barrier
- Original boarding / Sub-floor board
- Space between joists not insulated
- Original wood wool board w. render
Top storey spaces whose ceilings are insulated with Thermosafe-homogen are not suitable for use as living areas.U-value requirements (as per EnEV 2014): ≤ 0.24 W/m²K
- New building
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