Hello,
the following concerns the renovation of an uninsulated bungalow (masonry garage) of about 30m2 (320 sq ft). The metal roof has already been insulated and rests on inward-set reinforced concrete columns, which are infilled with calcium silicate bricks.
Since the building is flanked by firewalls on two sides and the roof overhang is small on one (short) side, in my opinion, only a complete interior insulation is feasible.
Wall structure (outside to inside):
- Rhombus battens, ventilated behind (horizontal) (planned)
- 20-40mm (1-1.5 inches) vertical battens (planned)
- approx. 160mm (6.3 inches) calcium silicate brick (existing)
- 5mm (0.2 inches) adhesive mortar (possibly to level joint between calcium silicate bricks)
- 60mm (2.4 inches)? insulation boards, possibly with wall heating
- (vapor retarder)
- Wall covering: gypsum board, plywood, or interior (clay) plaster
Since the floor is also to be insulated, underfloor heating and installation within the floor construction are options, alternatively wall heating.
A gas central heating system is present.
Is wall heating or underfloor heating suitable considering the high supply temperature of the gas central heating?
Wood fiber insulation: what should be considered?
I find the following interesting:
- Steico Therm at 160kg/m3 (10 lb/ft3) and λ 0.039 W/mK
- Steico flex038 at 50kg/m3 (3.1 lb/ft3) and λ 0.038 W/mK
- Steico flex036 at 60kg/m3 (3.7 lb/ft3) and λ 0.036 W/mK
- Steico internal at 160kg/m3 (10 lb/ft3) and λ 0.039 W/mK
- PAVAFLEX at 55kg/m3 (3.4 lb/ft3) and λ 0.039 W/mK
- Pavadentro at 175kg/m3 (11 lb/ft3) and λ 0.045 W/mK (sandwich construction with vapor retarder)
Are there any cost-effective alternatives?
Am I correct in understanding that the panels differ mainly in density (and price)? Which density is preferable for such a construction?
The manufacturers of wood fiber insulation panels often state that a vapor retarder is no longer necessary because the wood fiber insulation regulates moisture. Whether this is really the case should be verified by calculating the fRSi value. Otherwise, a vapor retarder would be used.
What would you recommend for interior plaster or wall covering?
Thank you very much!
Tom
the following concerns the renovation of an uninsulated bungalow (masonry garage) of about 30m2 (320 sq ft). The metal roof has already been insulated and rests on inward-set reinforced concrete columns, which are infilled with calcium silicate bricks.
Since the building is flanked by firewalls on two sides and the roof overhang is small on one (short) side, in my opinion, only a complete interior insulation is feasible.
Wall structure (outside to inside):
- Rhombus battens, ventilated behind (horizontal) (planned)
- 20-40mm (1-1.5 inches) vertical battens (planned)
- approx. 160mm (6.3 inches) calcium silicate brick (existing)
- 5mm (0.2 inches) adhesive mortar (possibly to level joint between calcium silicate bricks)
- 60mm (2.4 inches)? insulation boards, possibly with wall heating
- (vapor retarder)
- Wall covering: gypsum board, plywood, or interior (clay) plaster
Since the floor is also to be insulated, underfloor heating and installation within the floor construction are options, alternatively wall heating.
A gas central heating system is present.
Is wall heating or underfloor heating suitable considering the high supply temperature of the gas central heating?
Wood fiber insulation: what should be considered?
I find the following interesting:
- Steico Therm at 160kg/m3 (10 lb/ft3) and λ 0.039 W/mK
- Steico flex038 at 50kg/m3 (3.1 lb/ft3) and λ 0.038 W/mK
- Steico flex036 at 60kg/m3 (3.7 lb/ft3) and λ 0.036 W/mK
- Steico internal at 160kg/m3 (10 lb/ft3) and λ 0.039 W/mK
- PAVAFLEX at 55kg/m3 (3.4 lb/ft3) and λ 0.039 W/mK
- Pavadentro at 175kg/m3 (11 lb/ft3) and λ 0.045 W/mK (sandwich construction with vapor retarder)
Are there any cost-effective alternatives?
Am I correct in understanding that the panels differ mainly in density (and price)? Which density is preferable for such a construction?
The manufacturers of wood fiber insulation panels often state that a vapor retarder is no longer necessary because the wood fiber insulation regulates moisture. Whether this is really the case should be verified by calculating the fRSi value. Otherwise, a vapor retarder would be used.
What would you recommend for interior plaster or wall covering?
Thank you very much!
Tom
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