Gullringen house = blue concrete?

[AnnetteN]

Hello!
I have just looked at a one-story house with a basement built in '74 by Gullringenhus.
On the basic plan for the foundation, it appears to be built of blocks. It is specified as "Light concrete III K400". On the outside, a 2-layer cold asphalt has been applied.
The real estate agent doesn't know if it's "blåbetong" and the old construction description is completely unreadable. Is there anyone knowledgeable here on the forum who knows if Gullringenhus used radon-containing concrete for their basements or if they used a non-radiant variant?

 

[Demmpa]

Not all blåbetong contains radon-emitting material. Whether it contains radon-emitting material and, if so, how much, depends on where the shale was extracted.

 

[AnnetteN]

Yes, I know. Hence the question if anyone knows what type Gullringen built with.

 

[jackt]

My parents live in a gullringehus from the '70s. The entire basement is built of blocks. Tested with a radon meter about 15 years ago and there were no significant radon levels..

 

[hempularen]

Basements are normally not included in the materials package from a house manufacturer. The material is usually purchased from a local building supply store. So the exact type of lightweight concrete used can certainly vary even between two houses being built almost simultaneously on the same street.

 

[jackt]

Can check with the parents if they remember if the basement was included in the purchase.

 

[gstv]

Living in a Gullringshus with a basement built in -69. Have a basement made of blocks, but no radon. Living in Västerbotten...