Hello,
For the extension we have already built, we want to heat the floor slab. Originally, the pipes were supposed to be embedded in the concrete ceiling, but due to requirements for a radon-tight construction, the plan was changed. Now, the underfloor heating is to be installed directly on the concrete slab (without insulation) and then covered with 8cm (3 inches) of screed.
While reviewing the photos I took, I noticed that the XPS insulation ends flush with the formwork blocks. However, the concrete slab extends beyond these blocks, and the formwork blocks were also filled with this concrete. On the outside, only the concrete slab has insulation, which was later chamfered. Before that, a two-component waterproofing membrane was applied on the bricks and the concrete slab.
Now I am wondering if there is a thermal bridge at the formwork blocks and what possible solutions are available here?
Thank you very much!
Best regards,
Heli205
For the extension we have already built, we want to heat the floor slab. Originally, the pipes were supposed to be embedded in the concrete ceiling, but due to requirements for a radon-tight construction, the plan was changed. Now, the underfloor heating is to be installed directly on the concrete slab (without insulation) and then covered with 8cm (3 inches) of screed.
While reviewing the photos I took, I noticed that the XPS insulation ends flush with the formwork blocks. However, the concrete slab extends beyond these blocks, and the formwork blocks were also filled with this concrete. On the outside, only the concrete slab has insulation, which was later chamfered. Before that, a two-component waterproofing membrane was applied on the bricks and the concrete slab.
Now I am wondering if there is a thermal bridge at the formwork blocks and what possible solutions are available here?
Thank you very much!
Best regards,
Heli205
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