Hey!
Time for renovations again. I've torn up the floor in the hallway and plan to improve the insulation. I also want to install underfloor heating and tiles.
Everyone I ask has different solutions, and I don't know who has the best advice.
The problem is we have about 40mm from the floor joists to the top of the threshold at the front door and 30mm to the floor in the living room. Then there's the underfloor heating and tiles.
Is gypsum board necessary?
Chipboard 22mm + gypsum 13mm + self-leveling compound (20mm?) + adhesive and tiles (12mm?) = 67mm!?
What should I do?
One idea was to attach battens to the side of the floor joists and lower the chipboard there to save 22mm. However, when someone told me I needed gypsum, that plan fell apart.
#1. If I were to lower boards with pre-made grooves for underfloor heating, is it okay to cut grooves in the floor joists to align with the grooves in the board on the other side of the joist?
A new idea is to cut away a few cm from the floor joists and attach battens to their sides to easily set a straight new lower level for the floor. (It's difficult as a DIYer to saw perfectly straight on all the joists).
The joists are 230mm but cut out to 140mm in some places at one end where they rest on the old house foundation. (extension built in the 70s).
#2. How much can I safely cut out in that case?
How would you solve it?
Time for renovations again. I've torn up the floor in the hallway and plan to improve the insulation. I also want to install underfloor heating and tiles.
Everyone I ask has different solutions, and I don't know who has the best advice.
The problem is we have about 40mm from the floor joists to the top of the threshold at the front door and 30mm to the floor in the living room. Then there's the underfloor heating and tiles.
Is gypsum board necessary?
Chipboard 22mm + gypsum 13mm + self-leveling compound (20mm?) + adhesive and tiles (12mm?) = 67mm!?
What should I do?
One idea was to attach battens to the side of the floor joists and lower the chipboard there to save 22mm. However, when someone told me I needed gypsum, that plan fell apart.
#1. If I were to lower boards with pre-made grooves for underfloor heating, is it okay to cut grooves in the floor joists to align with the grooves in the board on the other side of the joist?
A new idea is to cut away a few cm from the floor joists and attach battens to their sides to easily set a straight new lower level for the floor. (It's difficult as a DIYer to saw perfectly straight on all the joists).
The joists are 230mm but cut out to 140mm in some places at one end where they rest on the old house foundation. (extension built in the 70s).
#2. How much can I safely cut out in that case?
How would you solve it?
Look through the installation instructions for different installation methods from underfloor heating suppliers, there you will see how it can be constructed and can find a variant that works with your building height.
We ourselves have used LK and know their range best, so I'll link you there:
http://www.lksystems.se/sv/support/dokumentation/dokumentation-lk-golvvarme/monteringsanvisningar/
For example, underfloor heating list 12 which from the top of the floor chipboard builds 25 mm (floor leveling compound) + tiles could be a viable option:
http://www.lksystems.se/globalasset...7_pa-barande-golv-med-lk-golvvarmelist-12.pdf
We ourselves have used LK and know their range best, so I'll link you there:
http://www.lksystems.se/sv/support/dokumentation/dokumentation-lk-golvvarme/monteringsanvisningar/
For example, underfloor heating list 12 which from the top of the floor chipboard builds 25 mm (floor leveling compound) + tiles could be a viable option:
http://www.lksystems.se/globalasset...7_pa-barande-golv-med-lk-golvvarmelist-12.pdf