External insulation for old building, built in 1908

  • Erstellt am 2019-04-14 15:43:21

Lemberger

2019-04-14 15:43:21
  • #1
Hello everyone,

I have just bought an old building dating from 1908 and now want to completely renovate it.

The interior construction is clear to me in large parts – I will also discover many things only once it is gutted.

My question is, the house has 60cm solid exterior walls (as was usual in the past) – is external thermal insulation sensible with this wall thickness, or does it rather not make much sense?

I look forward to suggestions.

Best regards, Jürgen
 

hampshire

2019-04-14 15:49:13
  • #2
I am not a big fan of insulating old buildings because the dehumidification often no longer works afterwards. Consult a real expert so that you do not pay for lower energy costs with mold and indoor health.
 

Lemberger

2019-04-14 15:52:05
  • #3
Thank you for the quick response - that was also my thought that there could be problems with dehumidification!
 

11ant

2019-04-15 01:13:28
  • #4
For 1908, I would absolutely not describe that as usual.
 

hampshire

2019-04-15 07:19:19
  • #5
Between 1880 and 1915, houses were built extremely solidly. Money was abundant, the French paid immensely high repair costs, and the industry was booming. So it's no wonder that construction was sometimes a bit more massive. The building fabric is often excellent, the installation is naturally outdated. By the way, you can make a small fortune with the old Bakelite switches. Don't throw them away!
 

dertill

2019-04-15 08:40:39
  • #6


At 60 cm wall thickness, I wouldn't consider adding another 10-16 cm, unless you’re into bunker aesthetics.

What kind of building is it? A "villa" or an old church building, an old craftsman’s house?

Neighbors on our street acquired a "villa" from this period. The wall thickness is about 50 cm. When they replaced the windows and examined the masonry, they saw a two-shell masonry made of 24 cm bricks, a 13 cm air gap, and an 11.5 cm facing wall (plastered). They had the air gap filled cheaply with blown-in insulation, the windows are triple-glazed, and the roof is properly insulated. They have an energy demand like a new building.

Many buildings from around the turn of the century have two-shell masonry (partially plastered) – better check yours as well; 60 cm rarely occurs without an air gap.
 

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