Hosby prefabricated house from 1983 - problematic indoor air analysis

Above you wrote that formaldehyde is three times higher than the limit value and lindane more than twice as high as the remediation target value?

But I also told you what that means statistically. No one will drop dead tomorrow (formaldehyde). And lindane only 1/4 of the danger value.
That was it for detected pollutants.

The asking price leaves no room for a major renovation.

I thought of wood for the wall paneling, behind which asbestos also often hides.

My opinion: If the money is only enough to buy, I would not buy the house.

... so, as if you were looking at the house practically like a contamination of the property?

I had initially interpreted Nordanney’s explanations as indicating that the measured values were problematic. In that case, of course, I would prefer to buy the property at land value rather than have a pollutant-contaminated house on top of it. Meanwhile, he has refined his statements. Nevertheless, I remain torn. By the way, it is not a window rebate ventilation, but a proper ventilation. Preheated air is blown into the living rooms and extracted in the bathroom, then passes through a heat exchanger and an exhaust air heat pump that cools the room air and thereby heats domestic water.

I had initially interpreted Nordanney's explanations as meaning that the measured values were problematic. Naturally, in this case, I would prefer to buy the property at land value rather than getting a house contaminated with pollutants on top. In the meantime, he has clarified his statements. Nevertheless, I remain torn.

As long as renting out the house is not illegal, it naturally has value from a realtor's (because from a seller's) perspective. Therefore, you will never get the land at the standard land value minus demolition costs. Even a rusty Porsche convertible with a moldy top remains a Porsche convertible and will not be given away. And toxic substances seldom are already present in the shell construction, so they can practically always be eliminated by stripping out.

By the way, it is not a window rebate ventilation but actual ventilation. Preheated air is blown into the living spaces and extracted in the bathroom, then passes through a heat exchanger and through an exhaust heat pump that cools the room air and thus heats the domestic hot water.

Thank you for the explanation. I remember the Hosby houses as having, in addition to the windows, another casement each, which is hidden behind the boarding. But I mostly know the houses only from print advertising; I have not yet seen one in a room tour.

I cannot help you with the limit values. However, I do find it rather puzzling that you spend over 1000,- for an analysis but cannot use the result immediately. What sense does the analysis then make? I also do not go to the radiologist and then start interpreting the images myself afterwards. In my opinion, the creator of the analysis should have clearly pointed out beforehand that he only determines the values without any further interpretation. Did he do that?

Were the rooms empty or furnished? I have in mind that our home construction company said people value healthy living, and then they buy a carpet and the values explode first. They had measured formaldehyde for themselves with us - before we furnished.

Were the rooms empty or furnished?

Yes. With furniture roughly from the year of construction.

I can't help you with the limit values. But I do find it surprising that you spend over 1000,- on an analysis but can't use the result immediately. What sense does the analysis then make? In my opinion, the creator of the analysis should have clearly pointed out beforehand that they only determine the values without any further interpretation. Did they do that?

Yes. He said it was a pure measurement. The interpretation would have to be done by a building biologist. They could recommend one, but don't have their own. Since I only did the measurement to save my marriage, I simply took the cheapest and fastest provider. I did not expect high measurement results, especially because of many years of reading the house construction forum.