Casting slab with Eps

[AlbinJO]

Hi!
I have removed the joist in a house over 100 years old due to poor maintenance.
I chose to fill up with Leca, lay cell plastic underfloor heating. Now to the question
Can I use eps for the slab? About 7-10 cm thick. 60 m2
Regards

 

[Jansson69]

Hi!
I've removed the floor structure in a house over 100 years old due to poor maintenance.
I chose to fill it up with Leca, install underfloor heating with cell plastic. Now to the question,
Can I use EPS for the slab? About 7-10 cm thick. 60 m2
Best regards

Why do you want to cast a structure with it?
Wouldn't it be better with concrete in terms of both durability and cost...

 

[Jarlingar]

You CANNOT use eps concrete with underfloor heating.

 

[AlbinJO]

Why do you want to use it for casting a construction?
Surely concrete is better both in terms of durability and economics...

I'm considering using a concrete truck, but since the truck's chute doesn't reach, it'll be a pump truck. I haven't checked the price for a pump truck yet.
Just wondering if anyone else has done something similar.

 

[AlbinJO]

You CANNOT use eps concrete with underfloor heating.

Thanks for the response!

 

[Jansson69]

I was considering taking a concrete truck, but since the chute on the truck won't reach, it will be a pump truck. I haven't checked the price of a pump truck yet. Just wondering if someone else has done something similar

You need to cast a structure with reinforcement, so forget the EPS concrete. It's a good filler that provides some insulation but not good in your case. Additionally, you would have to self-level on the EPS, and that will be expensive...

 

[AlbinJO]

You need to cast a construction with reinforcement so forget the EPS concrete, it's a good filler that provides some insulation but not good in your case, plus you must use leveling compound on the EPS and that will be expensive.

Okay thanks for the answer! Can I use EPS on top of the cellular plastic to even out the level on top of the cellular plastic sheets?

 

[Jansson69]

Okay, thanks for the answer! Can I use EPS on the cell foam to level the surface on top of the cell foam boards?

No, it will only crumble when you walk and reinforce and install underfloor heating, water, etc. You adjust the height with the leca balls before placing the cell foam.

 

[AlbinJO]

No, it will just turn into crumbs when you reinforce and install underfloor heating, plumbing, etc.
You adjust the height with the leca balls before placing the foam insulation.

There is a difference of a few centimeters in the bathroom and I have 2 pallets with EPS left. It will have to be a pump truck for this.

 

[Jarlingar]

eps on the cellular plastic

As long as you are under the floor heating, you can do that.
You absolutely must not cast floor heating into eps.

 

[Jansson69]

Differences of a few centimeters in the bathroom and have 2 pallets of eps left. Will have to use a pump truck for this

Sell those bags to someone who has the right need for them because it will just become a mess with a pouring on top of foam with EPS of 0-20mm.