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Aerated concrete lambda

Lambda value aerated concrete

Reference page for aerated concrete and its use in energy-conscious wall design.

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

Quick result

1.00 W/m²K

Estimated U-value from the reference build-up.

Calculate a custom version Check materials

At a glance

Assembly type

Aerated concrete 400

Reference lambda value for aerated concrete 400.

Total thickness

10 cm

Shown as a 10 cm reference layer for comparison.

Estimated U-value

1.00 W/m²K

Lower lambda means better insulation performance.

Worked example

Lambda reference: Aerated concrete 400

This page highlights the thermal conductivity of the material and shows how it behaves in a simple comparison layer.

Layer	Material	Thickness	Lambda	R

Layer	Material	Thickness	Lambda	R
Reference layer	Reference layer Single-leaf wall block	10 cm	0.120 W/mK	0.83 m²K/W
Surface resistances				0.17 m²K/W
Total resistance				1.00 m²K/W

How it is calculated

What lambda means here

R = d / lambda

Lambda describes how well the material conducts heat. A lower value usually gives a better insulating effect for the same thickness.

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

This reference page uses the material's catalog value and a simple 10 cm comparison layer.