Hi everyone, thanks for previous magnificent help.
I am about to finish my 3 x 3m rear extension. Only 2 rows of block remaining to go up before the roof is loaded. Being using 2.9N aircrete blocks of 440x215x215mm for my solid wall.
[ Can't seem to find 2.9N blocks in the market. They continue...
I am currently building a 3m X 3m rear extension (-permitted development) with 2 types of Aircrete blocks - 215mm (x 440L x 215H) and 140mm (x 440L x 215H). At one corner where these blocks meet, I just noticed that the 140mm blocks are vertically out of square by about 8mm at the widest point...