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Concrete wall

Concrete wall U-value calculation example

This comparison snapshot shows a 25 cm concrete wall with 15 cm EPS.

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

Quick result

0.19 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

43 cm

Total build-up thickness is 43 cm.

Estimated U-value

0.19 W/m²K

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

Worked example

Worked example: Concrete wall U-value calculation example

The comparison example keeps the result useful for the "concrete wall u-value calculation example" 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	25 cm	2.300 W/mK	0.11 m²K/W
EPS	Graphite EPS Facade insulation	15 cm	0.031 W/mK	4.84 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				5.16 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.

Concrete Wall U Value Calculation Example

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Comparison

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How To Calculate U Value

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Lambda Values Table

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Insulation Thickness Calculator

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Open the calculator

Use the main calculator to edit layers, compare materials, and export a custom result.

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Wall calculator

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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.