aircrete - properties of 7N blocks

Lightweight blocks are soft, thus easier to fix to than dense blocks, but they will of course carry far less weight.

...which is stating the obvious really, but I dont see what else one can say to your q. Yes I do - there are easy hammer in fixings for light blocks, dense blocks require slower traditional fixings.

NT

Oops, I meant to compare 7N aircrete with the standard (2.8 N ?) aircrete, since the 7N are not that much more expensive from themalite, celcon etc. Otherwise my question would have been idiotic - not like me at all ;->

Anyway, since I've seen the low cost of the Wickes aircrete blocks (95p each) I will almost certainly be getting them - I wonder who makes them for Wickes ... Simon.