Find your block
Find the right product for your project
Four questions about the project, and three recommendations with reasons. If you do not know an answer, leave it blank — the finder works with partial information.
Take the thickness from the project requirement
External wall thickness usually comes out of the thermal calculation, and internal wall thickness out of the acoustic requirement.
Insulation is a running cost
Each step up in insulation raises the initial cost a little and lowers energy use for fifty years.
Weight is a structural question
When adding a storey or retrofitting, a lighter wall can matter more than a better-insulated one.