Insulation of the base with WLG 025

okay....logical: 6 / 0.25 * 0.35 = 8.4. Therefore the question is whether 8 cm (mathematically it should be 8.4 cm) is sufficient, or whether it has to be 10 cm. The thermal resistance would then decrease from 2.4 to 2.29 m^2K/W at 8 cm, and the U-value would accordingly increase from 0.41 to 0.44.

The question is rather whether it then doesn't protrude... what does the construction look like? PUR is available for inside and outside, you just have to keep looking.

We have a baseboard (Z-profile) that extends 12 cm beyond the floor slab. There is therefore space for 8 cm insulation and then plaster. With 10 cm it would be tight. Hence the question (above calculation) whether 8 cm WLG035 is sufficient.

Base plaster is rather 5...10 mm, therefore 8 cm is no problem and usually also sufficient in practice.

: The construction site is in Rhineland-Palatinate with you. If it’s not too far, take a look at smartbau in Nettetal. It is a second-choice dealer (where second choice can also mean that the boards are once a cm too short or too long) who exclusively sells PUR/PIR. They can currently deliver a lot at unbeatable prices.