ᐅ Costs of 6 mm Wood Fiber Insulation with a Thermal Conductivity of 0.040 W/(m·K)

Hello,

for the interior insulation of our timber-framed house (ground floor and upper floor, each about 100 m² (1,076 sq ft) of living space), the architect estimated around 200 euros per m² (about 19 dollars per sq ft) of wall area for materials and labor, so a total of more than 50,000 euros. That seems very high to me.
From my research, the panels cost a maximum of 50 euros per m² (about 5 dollars per sq ft).
What total costs per m² should I normally expect?

Good luck
Egon der 3

Egon der 3. schrieb:

According to my research, the panels cost a maximum of 50 euros per m² (10.7 sq ft).

Who prepares the old walls so that the panels can be installed? Who pays for the adhesive to attach them? Who installs them? Who replasters the insulation afterward? And so on.
These tasks are not done by elves but by tradespeople (who also need materials for this) and expect to be paid accordingly.
Whether the entire package ultimately costs 180€ or 210€ I cannot say due to lack of experience, but I can easily imagine that.

It is always good to verify plausibility – using only the material cost of one of the required components as a basis is somewhat oversimplified. €200 are plausible, but it can certainly be cheaper. Don’t forget that the quality of workmanship can vary. Therefore, pay attention not only to the price but also to the supplier.

And interior insulation in timber framing is among the most complex and expensive types you can do (possibly except for vacuum insulation panels) in order to avoid damaging the structure. Is the building listed? Any pictures?

nordanney schrieb:

Who prepares the old walls so the panels can be installed? Who pays for the adhesive used to attach them? Who installs them? Who replasters the insulation afterward? And so on.
This isn’t done by magical helpers but by craftsmen (who also need materials for this) and expect to be paid accordingly.
Whether the entire package will finally cost €180 or €210, I can’t say from experience, but I can imagine it well.

That is already a realistic price. You also have to insulate the window reveals, which is quite detailed work, open up floors and work around beams, etc. Loose old plaster, cement-based plasters, old insulation materials, wallpapers, paints, and so on need to be removed. Usually, a base coat (and plaster mesh) must be applied, which requires time to dry before the insulation boards can be installed. These then need to dry again before the walls can be mounted and plastered.

superzapp schrieb:

Additionally, interior insulation in timber-framed houses is among the most complex and expensive to install (possibly except for vacuum insulation panels) if you want to avoid damaging the building’s structure. ...

Strange... Some acquaintances of ours renovated a floor in an older timber-framed house to rent it out as a vacation apartment. They installed insulation boards on the interior walls as a DIY project. During a visit, I mentioned "dew point shift," and they looked at me questioningly. I’m curious whether this will eventually cause problems, assuming I find out about it at all... 🙄