Is it possible to build a load-bearing internal wall on EPS concrete with 40 mm leveling compound?

[Tarelugnt]

As the headline states, I'm wondering if I can rebuild a load-bearing interior wall. The foundation for the wall is 13 cm EPS concrete coated with 40 mm self-leveling screed.

I read the FAQs on EPS-cement and it states that it cannot be used for load-bearing parts, and I might be hoping too much in thinking that this might apply to "bare" EPS concrete.

Does anyone know? The EPS hasn't been cast yet, so it's not a total disaster if we have to cast footings with real concrete, but it would be another step...

 

[MathiasS]

Anyone who can answer this probably wants to know what's underneath the EPS concrete.

 

[Tarelugnt]

Of course, I didn't mention that it is a thick old uninsulated concrete slab

 

[Anonymiserad 405730]

Of course, that I didn't mention it it's a thick old uninsulated concrete slab

Cast a strip with regular concrete under the bearing wall, so that the EPS is not burdened, 10-15cm in width is enough..

 

[Tarelugnt]

Cast a strip with regular concrete under the load-bearing wall, so that the EPS is not stressed, 10-15cm in width is enough..

Phew.. do you have to?

 

[Anonymiserad 405730]

Puh.. do you have to?

No, you don't have to, but if you want it to be good with no settling, then...
It's quite simple, just lay something as a support when you put out the EPS, and then cast with coarse concrete...😉

 

[Tarelugnt]

No, you don't have to, but if you want it to be good and without any settling... It is quite simple just to lay out something as a counter-hold when you lay out the EPS and then cast in with coarse concrete…😉

It would have been really disappointing if the renovation led to the house starting to sag. So we probably need to do as you say and cast a strip with regular concrete. It still feels a bit fiddly. Thanks for your input!

 

[Tarelugnt]

A bonus question for anyone reading: we are thinking of placing a strip of platonmatta against the sill to create an air gap. Is it wise or foolish? Doesn't feel so good to enclose the sill with plastic which is the common approach..?

 

[Anonymiserad 405730]

A bonus question if someone is reading: we were thinking of placing a strip of platon membrane against the sill to create an air gap. Is this wise or foolish? Doesn't feel so good to enclose the sill with plastic which is the common method..?

Better with thin insulation, like this:

https://www.finja.se/produkter/grund-cellplast/isolermatta

 

[Tarelugnt]

Better with thin insulation, like this:

[link]

Thanks! Do you have any thoughts on the risk of construction moisture seeping through?

 

[Anonymiserad 405730]

Thanks! Do you have any thoughts concerning the risk for construction moisture seeping through?

I don't know what the base is like... if there's concern about it, then put plastic under the EPS...

 

[nissenilson]

Don't know how the base is.. if you have concerns about it, put plastic under the EPS..

I'm not worried about downward (there's only concrete), it's just against the sill beam that I have my considerations. Ps I know I'm fussy 😆

 

[Anonymiserad 405730]

I'm not worried about downward (there's only concrete there), it's just towards the beam that I have my concerns. Ps I know I'm being a bit complex 😆

Do you also have multiple accounts😢

 

[nissenilson]

Do you have double accounts too😢

Haha, my partner and I share and switch around however we want.

 

[Anonymiserad 405730]

Haha, my partner and I share and switch things up however we like.

How am I supposed to know who I'm conversing these secrets with😢