After my first post along with the reply disappeared, I’m trying again... The house was built in 1910 with walls made of stones, partly bricks and concrete blocks, and should be insulated. Is it sufficient to install a vapor-permeable membrane on the inside, then mineral wool in wooden frames, and finish with an OSB board on the inside without a membrane? Or could this cause problems with the dew point? Regards
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Axolotl20227 Jul 2022 08:33Myrna_Loy schrieb:
However, the UBAKUS calculator is not well suited for older buildings. At best, it can provide a rough indication. The calculator does not take the building’s construction year into account. You only need to know the wall build-up, which is usually the real challenge.
If the wall build-up is not known precisely, you experiment a bit with the materials—in the end, it generally does not matter much which type of masonry the exterior wall is made of, as this usually results in only marginal differences.
Professionals also use the calculator (in the professional version).
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Axolotl20227 Jul 2022 08:41P.S. No matter how I calculate the wall structure, ubakus outputs "No, this will lead to moisture in the wall" for all variants.
What do you want to do with a vapor-permeable membrane? Such material is only used as a wind barrier. OSB is vapor-tight if the joints are sealed and glued.
The only thing I would do is to glue wood fiber boards over the entire surface and apply plaster on the outside. An energy consultant costs more than the savings over the next few years, and most know little about old buildings and even less about renovating them.
The only thing I would do is to glue wood fiber boards over the entire surface and apply plaster on the outside. An energy consultant costs more than the savings over the next few years, and most know little about old buildings and even less about renovating them.
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