Exact query

Concrete wall

Concrete wall 20 cm with 10 cm EPS

This retrofit case shows a 20 cm concrete wall with 10 cm EPS.

Used for quick thermal checks of walls, roofs, and floors.

Quick result

0.28 W/m²K

Estimated U-value from the reference build-up.

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At a glance

Assembly type

Concrete wall

Concrete wall plus EPS in a standard search-targeted build-up.

Total thickness

33 cm

Total build-up thickness is 33 cm.

Estimated U-value

0.28 W/m²K

The estimated U-value is based on the full layer stack.

Worked example

Worked example: Concrete wall 20 cm with 10 cm EPS

The retrofit example keeps the result useful for the "concrete wall 20 cm with 10 cm eps" search intent without repeating the same wording on every wall page.

Layer	Material	Thickness	Lambda	R

Layer	Material	Thickness	Lambda	R
Interior finish	Gypsum plaster Interior finish	1.5 cm	0.700 W/mK	0.02 m²K/W
Structural concrete	Structural concrete Slabs and load-bearing elements	20 cm	2.300 W/mK	0.09 m²K/W
EPS	Graphite EPS Facade insulation	10 cm	0.031 W/mK	3.23 m²K/W
External finish	Silicone render Facade finish	1.5 cm	0.870 W/mK	0.02 m²K/W
Surface resistances				0.17 m²K/W
Total resistance				3.52 m²K/W

How it is calculated

How this wall build-up is calculated

R = d / lambda

Each layer adds resistance using R = d / lambda. The final U-value includes the wall leaf, the insulation, and the surface resistances.

U = 1 / (Rsi + sum(R layers) + Rse)

This page is a quick reference, while the main calculator remains the place to adjust the exact project layers.

U Value Concrete Wall 20cm EPS 10cm

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Comparison

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Wall U Value Calculator

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How To Calculate U Value

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Lambda Values Table

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Open the calculator

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Insulation thickness calculator

Move from a U-value target to the thickness needed for walls, roofs, and floors.

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Notes

Search note

Pages like this support long-tail search queries and help users land directly on an assembly example.

Practical note

For detailed design, check the calculator and the wall guide pages to account for junctions and thermal bridges.