Happened to notice a new build going up and dump some goodies in a
skip as they are just doing the snagging. Managed to get around 50
brand new, 7 newton blocks. Movin that lot certainly burnt a few
calories! Theres still more in there, but imagine they'll be gone by
the time I go back!
A couple of years ago I managed to find a skip near a commercial build
which had around 6 bales of shrink wrapped soundpoofing rockwool
slabs.

Dave