Purchase decision small semi-detached house 100 sqm from 1930

  • Erstellt am 2022-08-17 14:24:18

Finch039

2022-10-18 15:50:08
  • #1
Unfortunately, I have not yet received any offers from the companies that offer this here in the region - the selection is unfortunately very limited and they are correspondingly busy. But: I have made the inquiries and yes, it should fit within the budget. I actually expect no more than €10k here? I wouldn't have thought that 6cm could make such a huge difference.
 

SumsumBiene

2022-10-18 16:09:45
  • #2
Regarding blown-in insulation, several people advised us against it, for example. You can’t get it in evenly, and then you get thermal bridges. Friends of ours just stripped one of their walls because of an extension. It showed that it’s not a “clean” cavity, and there was a lot of debris and crumbs in the lower part of the wall.
 

Finch039

2022-10-18 16:14:42
  • #3
I could imagine that this is already blown in with a lot of pressure - the individual particles must also be quite densely packed. Maybe someone here is familiar with this.
 

SaniererNRW123

2022-10-18 16:26:48
  • #4

1. If done by a professional, then you have—provided the cavity is accessible everywhere—insulation without gaps. Blown-in insulation is no longer exotic today but a very common technique. However, mistakes and mishaps can always happen, regardless of the trade.
2. And even if one spot is missed (unlikely), you still have 98% of the wall insulated, which is 98% more than without insulation. Energetically still simply good.
3. Who exactly are the "several"?

Then so be it. To forego affordable insulation because of a little debris and crumbs in the lower area of a wall (which, by the way, you can see beforehand if you look into the wall)? Because what is the alternative? Exactly, no insulation at all. And that is simply stupid.
 

SumsumBiene

2022-10-18 16:27:01
  • #5
How should the pressure be built up?

There were people who came from construction or had already renovated old buildings.
 

SaniererNRW123

2022-10-18 16:56:11
  • #6

Then I generally claim that they have no idea about blow-in insulation.

The insulation is "blown in" with increased pressure into the cavities according to a previously determined scheme. There are special blowing machines for this purpose.
Professionals first inspect the cavity through these approximately 2cm holes and can even remove a brick to clear debris at the base.
Good contractors are even certified specifically for these tasks. This has been established for about +/- 40 years. So it’s well established.
 
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