Hello, after reviewing the forum, I unfortunately did not find anything suitable on the topic of renovating an old prefabricated house. Therefore, I am asking if anyone might be able to share interesting, new experiences related to this.
We have purchased a Hanse house from the 1980s and are currently planning the renovation. We will definitely replace the asbestos-containing fiber cement facade and also improve the insulation.
What I am particularly interested in is the issue of pollutants and odors. The main problematic substances in older prefabricated houses are mostly the largely odorless formaldehyde as well as the odor compounds chloranisoles and chloronaphthalenes. We also notice a musty smell in our house.
The question now is: Is it generally recommended to replace the outer V100 board along with the insulation, then paint the infill panels and beams with lime wash, followed by installing new insulation and a new wood fiberboard? Is that usually sufficient?
What about additional or alternative measures such as fully applying a Valutect foil from the inside, or alternatively plastering the entire interior with clay? Do you see these as alternative solutions to replacing the exterior walls, or just as add-ons?
Thanks and best regards, Felix
We have purchased a Hanse house from the 1980s and are currently planning the renovation. We will definitely replace the asbestos-containing fiber cement facade and also improve the insulation.
What I am particularly interested in is the issue of pollutants and odors. The main problematic substances in older prefabricated houses are mostly the largely odorless formaldehyde as well as the odor compounds chloranisoles and chloronaphthalenes. We also notice a musty smell in our house.
The question now is: Is it generally recommended to replace the outer V100 board along with the insulation, then paint the infill panels and beams with lime wash, followed by installing new insulation and a new wood fiberboard? Is that usually sufficient?
What about additional or alternative measures such as fully applying a Valutect foil from the inside, or alternatively plastering the entire interior with clay? Do you see these as alternative solutions to replacing the exterior walls, or just as add-ons?
Thanks and best regards, Felix
I regret that the relationship between you and the local search function hasn’t improved yet. In https://www.hausbau-forum.de/threads/holzstaenderhaus-1985-lohnenswert.37441/#post-456953 I have linked additional posts – essentially, you can largely apply my assessments of Kampa from that time to Hanse Haus as well.
I have probably mentioned before that the off-gassing of an old board will be exceeded by that of its factory-fresh replacement, so such a replacement might actually do more harm than good. Clay plaster in a timber frame house raises some concerns for me: in traditional half-timbered houses, the infill panels were plastered with clay, but the plaster was not applied over the timber beams themselves. Let’s boldly assume that the old master builders were not foolish.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
Felix R schrieb:
The question now is: is it generally recommended to replace the V100 board [...] What about additional or alternative measures such as [...] alternatively plastering the entire interior with clay.
I have probably mentioned before that the off-gassing of an old board will be exceeded by that of its factory-fresh replacement, so such a replacement might actually do more harm than good. Clay plaster in a timber frame house raises some concerns for me: in traditional half-timbered houses, the infill panels were plastered with clay, but the plaster was not applied over the timber beams themselves. Let’s boldly assume that the old master builders were not foolish.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
M
Myrna_Loy14 Nov 2021 20:0811ant schrieb:
In timber-framed houses, the infill panels were plastered with clay, but the plaster was not applied over the beams. Let’s boldly assume that the old master builders were not foolish.Objection. Depending on the region, the beams were plastered inside and outside to varying degrees. Clay was particularly well-suited for this, as it helped regulate moisture effectively. Exposed timber framing was less common than plastered surfaces. Inside the living spaces, all walls were plastered, while utility rooms might have had exposed beams.
Felix R schrieb:
We also notice a musty smell.This can also be due to old wallpaper or wallpaper adhesive if no renovations have been done for 10-20 years.11ant schrieb:
I regret that the friendship between you and the search function here hasn’t warmed up yet. In https://www.hausbau-forum.de/threads/holzstaenderhaus-1985-lohnenswert.37441/#post-456953 I linked additional posts – basically, you can largely apply my assessments of Kampa from that time period to Hanse Haus.
And I have certainly mentioned before that the residual off-gassing of a replaced panel will be exceeded by its brand-new replacement straight from the factory, so such a replacement can actually do more harm than good. Clay plaster in a timber house raises some concerns for me: in half-timbered houses, the infill panels were plastered with clay, but the plaster was not also applied over the beams. Let’s boldly assume the old builders were not foolish. Probably linking and the search function are overwhelming me, but I haven’t found any indication regarding my question about the extent to which replacing V100 and old insulation has been effective in reducing odor issues. The same applies to Valutect or similar foil membranes in such a context…
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