Foam board higher than stud

[KaptenFilling]

I'm going to place foam board between studs and I'm wondering about the reasoning behind the measurements. A standard size for studs is, for example, 45x95mm, and the corresponding thickness for foam board seems to be 100mm. So the foam board will stick up a bit. Should I switch to 45x70 studs which have corresponding foam board with a thickness of 70mm?

 

[Rickard.]

Cellplast is not suited for studs as they are not normally used there. Compressing is probably impossible so if I were facing your problem, I would probably split the studs to fit the cellplast.

 

[useless]

Foam plastic between studs is not a common construction, so that's probably why it doesn't follow the same measurement standards.

 

[KaptenFilling]

Okay, I understand, I thought it was "standard sizes" It will be placed on top of a concrete floor in a garage. Then I'll go with double 50mm. Thanks.

 

[bomm]

Double 50mm becomes 100mm so I don't understand what you gain from doubling.

Can't you prop up 45x95 with blocks so you get 100mm?

 

[KaptenFilling]

Double 50mm becomes 100mm, so I don't understand what you gain with doubling.

Can't you prop up 45x95 with blocks and thus get 100mm?

Haha, I just realized my mistake now, thinking it was the joist that was 100
It might be better to raise it up as you say.

 

[useless]

Normally, you usually install the floor on top of the EPS, not frame between. What does the intended construction look like?

 

[Anna_H]

Do you realize that the studs become thermal bridges?

 

[C.Lundin]

If you are completely set on your solution, then go with 5mm pallbrickor. But as Useless mentioned, it's common to lay cellplast over the entire surface.

 

[KaptenFilling]

Normally, you would lay the floor on top of the insulation, not frame between. What does the intended construction look like?

I drew a bit in paint and hope you understand. If there is something I plan to do wrong, I would really appreciate if you tell me

You realize that the wooden beams are thermal bridges?

Even with a moisture barrier at the bottom? How do I avoid that? Should there be another material instead of wooden beams?

 

[useless]

Are the joists necessary? Google 'floating floor' and you'll see various constructions with the floor laid directly on the cellular plastic without joists underneath.

 

[KaptenFilling]

Are the studs necessary? Google 'floating floor' and you'll see various constructions with the floor laid directly on the foam without studs underneath.

Thanks.
Checked out this construction: https://bewi.com/sv/produkt-kategori/anvandningsomraden/konstruktioner/golv/
Do you think that a construction film is enough instead of an expensive moisture barrier?

 

[Anna_H]

Even with moisture barrier at the bottom? How do I avoid that? Should there be some other material instead of studs?

Yes, foam plastic