Kooltherm K12 Framing Board
Premium peformance insulation for steel and timber frame wall constructions
Which Steel or Timber Frame Insulation is Best for my Project?
We offer a range of solutions for steel and timber frames, including rigid Kooltherm (Phenolic) and Therma (PIR) boards, as well as mineral fibre slabs. We can also provide nilvent - our breathable membrane for use in timber frame wall applications.
There are a number of key considerations when insulating steel or timber frame walls, from the thermal performance of the products to how easy they are to handle and install. This page will guide you through the options available.
On this page you will find:
- Our steel and timber frame insulation options - Kooltherm K12 Framing Board, Thermawall TW55 and K-Roc Framing Slab.
- A comparison of the different solutions we offer so you can select the right product for your project - scroll down the page for a full comparison table.
- Useful links to help with your project, including our U-value calculator.
Useful Links
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Compare our Steel and Timber Frame Solutions
Product | Material | Advantages |
|---|---|---|
Phenolic insulation | Premium thermal performance - thermal conductivity as low as 0.021 W/mK. Target U-values can be reached with slim thicknesses of insulation Can be used between studs or as an insulating sheathing Can be used with both timber and steel frame wall constructions Easy to handle and install compared to some other commonly used insulants | |
PIR insulation | High thermal performance - thermal conductivity as low as 0.022 W/mK Can be used between studs or as an insulating sheathing Can be used with both timber and steel frame wall constructions Easy to handle and install compared to some other commonly used insulants | |
Rock mineral fibre insulation | Insulation for steel frame systems A1 Euroclass reaction to fire 610 mm wide slabs fit neatly between studs at 600 mm centres | |
Breathable membrane for timber frame walls | Waterproof - can be used as a temporary roof covering Non-tenting Airtight at normal building pressures Quiet under wind loading Durable - heat and UV stable |
Page updated: 16/05/2025