Guide
Timber frame guideTimber frame insulation thickness guide
Timber frame walls usually depend heavily on insulation thickness and careful layer sequencing.
Used for quick thermal checks of walls, roofs, and floors.
Guide page based on a 14 cm reference wall leaf.
The reference build-up uses a wall leaf, insulation, and finish layers.
The example U-value gives a quick orientation for the guide.
Timber frame insulation thickness guide worked example
This guide turns the general formula into a wall-specific thickness decision 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 |
| Softwood |
Softwood
Timber framing
|
14 cm | 0.130 W/mK | 1.08 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 | 5.57 m²K/W | |||
How the guide estimate works
R = d / lambda
The guide starts with a base wall, adds insulation, and shows the remaining thermal resistance available for the target U-value.
U = 1 / (Rsi + sum(R layers) + Rse)
That makes the page useful for search, but the calculator remains the right tool for exact project work.
Related wall pages
U Value Timber Frame Insulation Thickness Guide
Open u value timber frame insulation thickness guide for the next step in this journey.
Open hubHow To Calculate U Value
Open how to calculate u value for the next step in this journey.
Open next stepInsulation Thickness Calculator
Open insulation thickness calculator 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 calculatorWall calculator
Switch to the dedicated wall page for broader wall guidance and faster comparisons.
Open wall pageTimber pages are useful for prefabricated and low-carbon wall searches.
The guide is deliberately practical and search-focused so it stays useful on first load.
Thermal bridges in timber frame construction should be checked separately in a final design stage.
The page supports the wider wall content cluster and leads users back to the main calculator.