Hi!
I'm planning to cast a new slab with EPS cement. To improve the insulation, I thought to first put a layer of styrofoam underneath since I'm installing underfloor heating. I've seen several posts and instructions that styrofoam should not be used as a base for EPS, but my question is, what can happen? Has anyone tried this?
I'm planning to cast a new slab with EPS cement. To improve the insulation, I thought to first put a layer of styrofoam underneath since I'm installing underfloor heating. I've seen several posts and instructions that styrofoam should not be used as a base for EPS, but my question is, what can happen? Has anyone tried this?
I guess...
That you get poor load-bearing capacity on the slab. The foam slab will not be pressed down against the gravel bed. It needs something heavy over it to spread surface pressure. In other words, if you cast something light on top, the foam will hang in the air in parts.
That you get poor load-bearing capacity on the slab. The foam slab will not be pressed down against the gravel bed. It needs something heavy over it to spread surface pressure. In other words, if you cast something light on top, the foam will hang in the air in parts.
Understand that it may feel a bit contradictory, but the idea is that I want to avoid waiting three months for the concrete before I can apply the waterproofing. So EPS might be a better solution, although I still want to have as well-insulated a foundation as possible.
I have also considered the options you are thinking about largab.
I have also considered the options you are thinking about largab.
I assume you are NOT planning to embed the heating coils in the floor???
It's not a good idea if you want good regulation and good economy.
If you follow the VillaVarm concept (which is more expensive), you'll also get something that works!!
In my case, I also waited to install the floor until the house was basically finished.
http://www.villavarm.se/villa-varms-unika-golv
It's not a good idea if you want good regulation and good economy.
If you follow the VillaVarm concept (which is more expensive), you'll also get something that works!!
In my case, I also waited to install the floor until the house was basically finished.
http://www.villavarm.se/villa-varms-unika-golv
Contradictory is probably less of an issue; I was mostly thinking that one might not want insulation above the underfloor heating. Then the whole idea of embedding pipes in the floor kind of falls apartdaniel76 said:
But if you can make EPS-cement quick-drying, there should be the same mix without insulation, right? The EPS pellets themselves can hardly make a difference for the drying process? Or am I completely misunderstanding you...
Anyone have knowledge about this combination?
That is, foam plastic and then EPS cement on top? I read that there is a risk that the curing temperature rises with foam plastic underneath because it insulates. But that sounds strange.
What about the loads, EPS cement weighs one tenth of regular concrete and could pockets form between the macadam and foam plastic since the pressure is not particularly high?
Bathroom;
In my case ground-macadam 150mm-150mm foam plastic-150 mm EPS cement-underfloor heating-floor levelling compound.
That is, foam plastic and then EPS cement on top? I read that there is a risk that the curing temperature rises with foam plastic underneath because it insulates. But that sounds strange.
What about the loads, EPS cement weighs one tenth of regular concrete and could pockets form between the macadam and foam plastic since the pressure is not particularly high?
Bathroom;
In my case ground-macadam 150mm-150mm foam plastic-150 mm EPS cement-underfloor heating-floor levelling compound.