Comparison
EPS vs mineral wool lambda
Reference snapshot: Compare the conductivity of EPS and mineral wool when you want to choose an insulation material quickly.
Used for quick thermal checks of walls, roofs, and floors.
Two common insulation references compared side by side.
Both materials are shown at the same comparison thickness.
EPS lambda 0.031 vs mineral wool lambda 0.035.
Comparison-ready reference build-up
Comparison view: Compare the conductivity of EPS and mineral wool when you want to choose an insulation material quickly.
| 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 |
| Graphite EPS |
Graphite EPS
Facade insulation
|
10 cm | 0.031 W/mK | 3.23 m²K/W |
| Mineral wool |
Mineral wool
General insulation
|
10 cm | 0.035 W/mK | 2.86 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 | 6.29 m²K/W | |||
Why the comparison matters
R = d / lambda
The page is built to answer a search query directly and then hand the user off to the calculator for adjustments.
U = 1 / (Rsi + sum(R layers) + Rse)
That makes the page useful both for search discovery and for conversion into actual calculations.
Related pages
EPS Vs Mineral wool Lambda
Open eps vs mineral wool lambda for the next step in this journey.
Open hubWall U Value Calculator
Open wall u value calculator for the next step in this journey.
Open next stepHow To Calculate U Value
Open how to calculate u value for the next step in this journey.
Open supportOpen the calculator
Use the main calculator to edit layers, compare materials, and export a custom result.
Open calculatorInsulation thickness calculator
Move from a U-value target to the thickness needed for walls, roofs, and floors.
Open thicknessComparison note
EPS usually gives a lower lambda than standard mineral wool, so it can achieve the same resistance with less thickness.
Practical note
Mineral wool is often chosen for acoustic or fire-performance reasons, even when the lambda is slightly higher.