Can someone help,what thickness insulation do I need for cavity wall (concrete block outside and celcon inside) the cavity is 80mm wide.
Can I use Earthwool Dritherm cavity slab 32 Ultimate 75mm and what fixings do I need? or is Rockwool as good? thanks.
Also how many concrete blocks do I need for a triangular cable wall 9.5 metres wide at bottom to 3.2 metres top, I calculated 10 blocks to 1 square metre = tl. 304 blocks ?
Can I use Earthwool Dritherm cavity slab 32 Ultimate 75mm and what fixings do I need? or is Rockwool as good? thanks.
Also how many concrete blocks do I need for a triangular cable wall 9.5 metres wide at bottom to 3.2 metres top, I calculated 10 blocks to 1 square metre = tl. 304 blocks ?