What’s the best insulation type for a double garage conversion in Bedfordshire?

The best insulation type for a double garage conversion in Bedfordshire depends on the space you have and the U-values you need to hit, rather than one product suiting every job. Rigid PIR or polystyrene boards are popular for floors and walls because they achieve strong thermal performance in a slim thickness, which matters when floor height and internal space are tight. Mineral wool is often used between roof joists and for acoustic separation on party walls. The right choice balances thermal performance, moisture control and available space. We specify the full build-up for your double garage and confirm it with building control before installation.