Insulation of top floor ceiling / roof in old buildings

  • Erstellt am 2015-03-08 18:06:46

Blackforest

2015-03-08 18:06:46
  • #1
Hi everyone,

since my planned new construction is not happening and I am instead buying an old building, I have a question about insulation. Unfortunately, I don't know much about it. An energy consultant (BAFA) has already come by, but it will still take a while until I get the report. I would be happy if someone here could share their experiences so that I have a comparison to what the energy consultant will say in April.

Specifically, it is about insulating the top floor ceiling, which I am legally obliged to do within two years after purchase, right? It is a solid construction house built in 1967. The current structure of the top floor ceiling (wood beam ceiling) is as follows: I’ll start from the very bottom: -12mm gypsum board - approx. 8mm chipboard - 160mm wooden beams ==> between the beams are about 60mm thick Styrofoam boards - approx. 22-24mm spruce boards - 20mm bitumen board (Gutex) - approx. 15mm chipboard

What should I change about this structure? Just add something on top, or remove everything including the Styrofoam and insulate differently?

The roof in the knee wall area should also be insulated. The structure here from the inside is as follows:

- 12mm gypsum board - approx. 8mm chipboard - wooden beams Between the beams: - (50mm thick) quilted glass wool, which was attached to the beams with a thin cardboard overlap. - approx. 22mm bitumen board (Gutex) - battens on the beams, between which a 4mm hard fiberboard is fixed (because of snow) - tiles

What should one do here? The tiles are still perfect, so an external roof insulation is out of the question for me! Since I can hardly reach the existing structure, does that only leave insulation beneath the rafters?

Many thanks in advance for your tips.

Regards Blackforest
 

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