ᐅ Insulating an Existing Basement Floor and Installing Underfloor Heating
Created on: 16 Oct 2020 20:27
V
Vinzenz
In my newly purchased detached house from 1985, I want to retrofit insulation under the basement floor and install underfloor heating.
There is a screed without insulation present. The screed was poured directly onto the concrete floor.
I now plan to break up the screed. The concrete basement floor underneath is uneven.
Now my questions regarding the new construction...
1. Do I need to level and seal the uneven floor? The floor and the existing basement are dry. However, I have heard that when installing underfloor heating retroactively, the floor can then draw moisture (or condensation)?!!
2. My plan is to place 10 cm (4 inches) of rigid polyurethane insulation on the existing floor, install the underfloor heating system on top, and then pour screed over everything. What is the correct layering or procedure here?
There is a screed without insulation present. The screed was poured directly onto the concrete floor.
I now plan to break up the screed. The concrete basement floor underneath is uneven.
Now my questions regarding the new construction...
1. Do I need to level and seal the uneven floor? The floor and the existing basement are dry. However, I have heard that when installing underfloor heating retroactively, the floor can then draw moisture (or condensation)?!!
2. My plan is to place 10 cm (4 inches) of rigid polyurethane insulation on the existing floor, install the underfloor heating system on top, and then pour screed over everything. What is the correct layering or procedure here?
BobRoss schrieb:
the usual floor insulation boardsThat may be the case; we used insulation with a very high thermal conductivity value (WLS024). Now I remember that I searched for insulation with an "integrated screed," but there wasn’t a suitable option available.