Exterior refurbishment with existing interior plasterboard
- Tiling battens
- Cross/counter battens
- GUTEX Ultratherm
- Air barrier as per GUTEX System partner
- GUTEX GUTEX Thermoflex between rafters
- Original aluminium-faced mineral wool
- Original battens
- 12.5 mm plasterboard / fibrous gypsum board
U-value requirements (as per EnEV 2014): ≤ 0.24 W/m²K
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