Member
· Västra Götaland
· 9 posts
Due to a water damage in one corner and odor issues, I have torn out all the flooring on my basement level. The floor was built with wooden joists directly on uninsulated concrete slab. I have now re-drained and plastered the inside of all exterior walls that are below ground.
I want my new floor to have water-based underfloor heating with parquet on top.
I now have a bit of a tricky choice ahead of me.
Either I build a ventilated floor, like Nivell or Granab. Then you use grooved chipboard on the joists and press in underfloor heating pipes. Under the joists, I would then install a fan that maintains a small airflow.
Advantages: I ventilate away any odors. If moisture gets in, it's also ventilated away.
Disadvantages: Relatively expensive. Unclear if the underfloor heating becomes inefficient.
The alternative is to cast a few centimeters with EPS concrete (concrete with polystyrene balls, which has a half-decent insulation ability) and then lay 50 mm grooved polystyrene with underfloor heating pipes in it.
Advantages: No organic material until the parquet. Cheaper (40'-50' cheaper than ventilated). Solid and sound insulating. All space is used for insulation.
Disadvantages: Uncertain how the saved wall (which is above ground) handles that extra moisture can move from floor to wall, which can apparently be a problem when installing underfloor heating.
Right now I'm leaning towards EPS concrete + Polystyrene. Anyone have thoughts or tips?
/Mexitegelvillan
I want my new floor to have water-based underfloor heating with parquet on top.
I now have a bit of a tricky choice ahead of me.
Either I build a ventilated floor, like Nivell or Granab. Then you use grooved chipboard on the joists and press in underfloor heating pipes. Under the joists, I would then install a fan that maintains a small airflow.
Advantages: I ventilate away any odors. If moisture gets in, it's also ventilated away.
Disadvantages: Relatively expensive. Unclear if the underfloor heating becomes inefficient.
The alternative is to cast a few centimeters with EPS concrete (concrete with polystyrene balls, which has a half-decent insulation ability) and then lay 50 mm grooved polystyrene with underfloor heating pipes in it.
Advantages: No organic material until the parquet. Cheaper (40'-50' cheaper than ventilated). Solid and sound insulating. All space is used for insulation.
Disadvantages: Uncertain how the saved wall (which is above ground) handles that extra moisture can move from floor to wall, which can apparently be a problem when installing underfloor heating.
Right now I'm leaning towards EPS concrete + Polystyrene. Anyone have thoughts or tips?
/Mexitegelvillan
As mentioned, what did you choose...? I probably would have gone with Giha flooring..... same principle as Nivell, but a bit cheaper....
I probably would have had a hard time sleeping with a new top layer over the old one,,,, (EPS).... would like a more detailed report specifically about the EPS....
I probably would have had a hard time sleeping with a new top layer over the old one,,,, (EPS).... would like a more detailed report specifically about the EPS....
Member
· Västra Götaland
· 9 posts
I finally installed an under-ventilated floor. I chose the Granab system and it seems to work fine. The reason I chose under-ventilated instead of EPS is that I talked to an inspector at Anticimex who considered that under-ventilated is the best construction available.
/Mexitegelvillan
/Mexitegelvillan