ᐅ Installations should not compromise the building envelope.

86bibo schrieb:
Calculate the total perimeter of the ventilation holes and how many small nails can be hammered into the vapor barrier for that.

Well, the perimeter is probably larger, or to reach the perimeter of one ventilation unit, you can hammer many nails, but I also think that at some point the quantity becomes significant. As Uwe82 says, you’re more willing to seal 10 vents carefully than hundreds of nails, boxes, cables, etc.

Hello

I have just built a house myself, of course with a single level. This significantly reduces potential weak points.
When installing a decentralized ventilation system, you usually remain within the insulated building envelope and only have penetrations for exhaust and fresh air.

Olli

Are the cables installed loose in the installation layer or routed inside conduits?

DNL schrieb:
Are the cables installed loosely in the service zone or inside conduit?

Actually, it doesn’t really make a difference whether there is a service zone or not. This cannot be answered generally. NYM cables are allowed to be installed without conduits. However, they can also be run inside conduits. If individual wires are used, conduits must be installed. Satellite and network cables also have to be run inside conduits to allow for replacement if needed.

Hello,

please don’t immediately start yelling "Jehovah" and throwing stones, but I have to ask:

If a service cavity is added in a prefabricated house, the wall becomes thicker (meaning the interior space of the house gets smaller) and the house becomes more expensive and complex.

Isn’t it simpler to build with solid construction in that case?

I used to think prefabricated houses were significantly cheaper, but I have since learned that the opposite is often true.

So why go through all this hassle?

Best regards,

Andreas

andimann schrieb:
I used to think that prefabricated houses were significantly cheaper, but I have since learned that the opposite is often true.

The term "prefabricated house" suggests that because of how other consumer goods are manufactured. However, that is really not the case. Prefabricated houses have different advantages and disadvantages, but that’s not the focus here.

andimann schrieb:
If an installation layer is added to a prefabricated house, the wall becomes thicker (meaning the interior space gets smaller) and the house gets more expensive and complex.

Not necessarily. Most manufacturers have a standard wall thickness and then offer an upgrade for a higher energy standard like KfWxx by making the wall thicker on the inside, which automatically creates an installation layer.

We chose a manufacturer whose standard wall already includes this, measuring 31cm (12 inches) thick. This almost meets KfW55, which is difficult to achieve with solid construction—or at least much more expensive. With a 36cm (14 inches) wall, most offers automatically include an installation layer.