Dman

thank you for the advice The foundations blocks at 3 course should bring it to dpc level at 150mm he has told me. I’ve been advised to use the 350mm blocks instead of the the 300mm blocks

Hi all, I’m building a 350mm wide wall made up of: 100mm inner block 100mm outer leaf 120mm PIR rigid insulation 30mm cavity I’m trying to decide between using 300mm or 350mm wide foundation blocks. Also, my bricklayer mate has suggested doing 3 courses of foundation blocks, but this would bring the top course above ground level. What’s the general rule of thumb for how many foundation blocks courses you should lay? Any advice or experiences would be much appreciated!