A house provider places particular emphasis on a vapor-permeable wall construction in their house descriptions. This is one of the main reasons why the provider does not install a central ventilation system. Another reason is that biomass (small dust particles, etc. in the air) can be drawn into the duct system, which can quickly lead to contamination (mold growth) within the distribution system.
I have two issues with this.
1. We generally wanted a ventilation system, but the provider does not install one at all.
2. We are now unsure how effective this vapor-permeable wall construction really is and whether it might be reasonable to forgo the ventilation system because of it.
Here is a brief outline of the wall construction (Swedish house facade) from inside to outside:
15 mm (0.6 inches) high-quality Fermacell solid construction panels
40 mm (1.6 inches) timber frame structure with Knauf Insulation, 40 mm (1.6 inches), thermal conductivity class 040
0.2 mm (0.008 inches) vapor retarder, diffusion equivalent air layer (Sd) 100 m (328 feet)
160 mm (6.3 inches) timber frame structure with Knauf Insulation, 160 mm (6.3 inches), thermal conductivity class 040
30 mm (1.2 inches) wood fiber insulation board
24 mm (0.9 inches) battens
Approx. 20 mm (0.8 inches) SL boarding, spruce (color according to color chart)
It would be very helpful if someone could explain the advantages of this vapor-permeable wall construction compared to other timber frame walls. The relationship to the ventilation system is especially important for us. With Hagemann Haus, we would have to forego this ventilation system altogether.
I have two issues with this.
1. We generally wanted a ventilation system, but the provider does not install one at all.
2. We are now unsure how effective this vapor-permeable wall construction really is and whether it might be reasonable to forgo the ventilation system because of it.
Here is a brief outline of the wall construction (Swedish house facade) from inside to outside:
15 mm (0.6 inches) high-quality Fermacell solid construction panels
40 mm (1.6 inches) timber frame structure with Knauf Insulation, 40 mm (1.6 inches), thermal conductivity class 040
0.2 mm (0.008 inches) vapor retarder, diffusion equivalent air layer (Sd) 100 m (328 feet)
160 mm (6.3 inches) timber frame structure with Knauf Insulation, 160 mm (6.3 inches), thermal conductivity class 040
30 mm (1.2 inches) wood fiber insulation board
24 mm (0.9 inches) battens
Approx. 20 mm (0.8 inches) SL boarding, spruce (color according to color chart)
It would be very helpful if someone could explain the advantages of this vapor-permeable wall construction compared to other timber frame walls. The relationship to the ventilation system is especially important for us. With Hagemann Haus, we would have to forego this ventilation system altogether.
Is there a possibility that you outsource the ventilation system?
I have already looked at this provider and am still trying to find the catch, as they seem quite affordable, especially for the basement and foundation slab.
I always thought that a wall that transports moisture to the outside has to be saturated...
I have already looked at this provider and am still trying to find the catch, as they seem quite affordable, especially for the basement and foundation slab.
I always thought that a wall that transports moisture to the outside has to be saturated...
tbb76 schrieb:
Is it possible for you to contract the ventilation system separately?
I have already looked into this provider and am still trying to find the catch, as their offer, especially for the basement and foundation slab, seems very affordable.
I always thought that a wall that transports moisture outward needs to be saturated...I don’t know. The ventilation system definitely annoys me, otherwise I would really be interested in the house provider and the price.
bernie schrieb:
The only alternative: retrofitting a decentralized ventilation system, as is often done nowadays in renovations And how practical is that? It seems Hagemann Haus also has no objections to a decentralized system.
And what would something like that cost?
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