ᐅ Expert Consultant: In Which Construction Phases Is Their Involvement Crucial?

Snowy36 schrieb:
Airtight Boxes

How many shot glasses of heating oil equivalent would you theoretically waste per year if an electrical switch box, which weakens an exterior wall locally by about four and a half centimeters (1.75 inches), were not sealed perfectly airtight?

Energy saving is important, of course, but I’m just as sure that the Pope is Catholic without needing a forensic examination of his baptism certificate.

I somehow lack the mental image that there could be black holes of significant size in my house, leaking energy into another universe. Seriously.

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There is the blower door test for this purpose. The main point is that the total amount of air leakage through gaps should remain below the specified limit.

It’s less about energy saving and more about drafts. Otherwise, it will whistle through like a sieve.

A socket tornado like that is definitely unpleasant. Does it even exist anymore in an energy-saving regulation house?
I only know this problem from our rental apartments in Lower Saxony. It was completely unknown to me before.

11ant schrieb:
How many shot glasses worth of heating oil equivalent would theoretically be wasted per year if an electrical box that locally reduces an exterior wall’s insulation by about four and a half centimeters (1.8 inches) is not perfectly airtight?

Energy loss is not even the main issue; it’s the thermal bridge = risk of condensation = risk of mold.
Electrical outlets next to compression foam tape installations on windows are, as far as I know, the number one weak point.

We will soon need an appraiser / expert.
Could someone tell me how much the costs were, with at least 7-8 inspections?
And ideally also for the contract review?