Exact query

Brick wall

Brick wall 20 cm with 15 cm mineral wool

This comparison snapshot shows a 20 cm brick wall with 15 cm mineral wool.

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

Quick result

0.21 W/m²K

Estimated U-value from the reference build-up.

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At a glance

Assembly type

Brick wall

Brick wall plus mineral wool in a standard search-targeted build-up.

Total thickness

38 cm

Total build-up thickness is 38 cm.

Estimated U-value

0.21 W/m²K

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

Worked example

Worked example: Brick wall 20 cm with 15 cm mineral wool

The comparison example keeps the result useful for the "brick wall 20 cm with 15 cm mineral wool" 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
Solid ceramic brick	Solid ceramic brick Masonry wall leaf	20 cm	0.770 W/mK	0.26 m²K/W
mineral wool	Mineral wool General insulation	15 cm	0.035 W/mK	4.29 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				4.75 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.

Comparison

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Lambda Values Table

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Insulation Thickness Calculator

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How To Calculate U Value

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Wall U Value Calculator

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R-value vs U-value

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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.