Casting up 2 cm Under cellular plastic

[Snabelhund]

As the title suggests, re-insulating the basement with pordrän and foam plastic, on part of the floor there is an inspection hatch, need to make a 2cm ledge so that the "frame" (The brick) aligns with the drainage boards, so that the XPS is level.

What is suitable to cast/build up with? Leaning towards eps-cement but happy to receive tips.

see image for more detailed explanation

 

[Silver78]

What are you going to put on the EPS concrete?

 

[Snabelhund]

What are you going to put on the EPS concrete?

Cellplast xps, then self-leveling compound, mostly to get level with the drainage board so that the xps doesn't crack or become slanted.

 

[Snabelhund]

It may not be apparent from the picture I see now it concerns a piece of 50x10 cm that is not level with the drainage boards, needs to come up 2 cm to be level so that there won't be a "hole under the xps."

 

[C.Lundin]

Jack out locally where you have the gap, if the cell plastic is not exactly level everywhere else, it is not critical if you are going to plaster.

 

[Silver78]

How thick are you planning to apply the filler and will it be reinforced? If you're going to reinforce, there's no problem if the XPS is uneven. I don't think it's a problem even if you go without reinforcement. Just cut out as suggested earlier.