Hello all happy builders,
I am in the process of renovating the house we bought, built in 1970, split-level house. I have a few questions.
On the lower floor, there have been raised floors on a rough slab, half of the lower floor, the other half has had a dry mix on the concrete slab. I have torn everything down and plan to replace it with underfloor heating, but have limited height and the idea is to go with:
- Shims to level out
- Plastic (questioned but recommended)??
- 50mm XPS
- Underfloor heating pipes
- Reinforcement
- About 7-8cm slab C30-37 (smaller fraction).
Thoughts? There is a rough slab underneath it all so…
The idea has been to use radiators but underfloor heating might work.
The second question concerns exterior walls in half of the house. Half of the house including the central load-bearing wall is concrete hollow block, but two gable walls on the lower floor and the front side so to speak are blue concrete 150mm.
The wall there consists of Mexican brick, 3cm polystyrene and then blue concrete 150.
I want to remove these and replace them with LECA blocks or concrete hollow blocks.
First, the idea was LECA but I have to use a 5Mpa type, which is more expensive and not sold everywhere, then I spoke with someone who suggested that since that part of the house is above ground level, you might as well use concrete hollow blocks as it is not as damp as the other half of the house which is below ground.
Concrete hollow blocks are much stronger, around 10-15 Mpa, and the insulation between the Mexican brick is in the form of polystyrene.
Buying insulation blocks becomes really expensive and maybe unnecessary. It is concrete between floors.
What do you think?
