Janosch07
2024-01-23 20:55:18
- #1
Hello everyone,
I have the following problem / construction project:
- We live in a mid-terrace house, whose ground floor is about 50 cm above zero level (so "half-basement").
- In front of this house is an extension, which is constructed as follows: Two strip foundations that go up to the house (so it forms a "U") on which a wooden extension was built (cross beams on which the wooden planks lie as a substructure for the floor)
- In the extension (which is open to the living space) we have underfloor heating, covered with screed and tiles.
So we lose quite a bit of heat through the floor into the crawl space outside. We now want to insulate the crawl space afterwards. The question is: How?
- Which insulation material is best to use here? The height is max. 25 cm, so crawling underneath is not possible. The area is about 3x2.5m, which makes laying boards impossible. Furthermore, the insulation lies on the ground. The floor is dry (since covered), but there is always the risk that moisture rises from the ground - therefore mineral wool is probably out of the question.
We were now considering filling with loose-fill insulation using perlite. However, the ceiling creates compartments due to the cross beams, and we are not sure if we can fill these completely without gaps (2.5m depth with 25 cm height makes controlled filling very difficult).
My main questions are now:
- Is perlite suitable for this or do you recommend another insulation material?
- Should I worry about possible mold growth (no ventilation anymore under the wooden extension)? Or is that not a problem with perlite?
Thank you very much in advance for your help and support.
Best regards Janosch07
I have the following problem / construction project:
- We live in a mid-terrace house, whose ground floor is about 50 cm above zero level (so "half-basement").
- In front of this house is an extension, which is constructed as follows: Two strip foundations that go up to the house (so it forms a "U") on which a wooden extension was built (cross beams on which the wooden planks lie as a substructure for the floor)
- In the extension (which is open to the living space) we have underfloor heating, covered with screed and tiles.
So we lose quite a bit of heat through the floor into the crawl space outside. We now want to insulate the crawl space afterwards. The question is: How?
- Which insulation material is best to use here? The height is max. 25 cm, so crawling underneath is not possible. The area is about 3x2.5m, which makes laying boards impossible. Furthermore, the insulation lies on the ground. The floor is dry (since covered), but there is always the risk that moisture rises from the ground - therefore mineral wool is probably out of the question.
We were now considering filling with loose-fill insulation using perlite. However, the ceiling creates compartments due to the cross beams, and we are not sure if we can fill these completely without gaps (2.5m depth with 25 cm height makes controlled filling very difficult).
My main questions are now:
- Is perlite suitable for this or do you recommend another insulation material?
- Should I worry about possible mold growth (no ventilation anymore under the wooden extension)? Or is that not a problem with perlite?
Thank you very much in advance for your help and support.
Best regards Janosch07