I am building raised blockwork beds around my deck but the end will be up against my house wall. What do I need to put between the block and the brick to stop moisture ingress into my exterior wall?
I used this against the wall on my raised beds, been in a year seems to be fine http://www.screwfix.com/p/dmp-damp-proof-membrane-black-1200ga-3-x-4m/73066