On Jan 20, 12:47*pm, sm_jamieson wrote:
I have to build an aircrete wall and cavity against a brick party
wall. The party wall is 9" thick up to around 2 metres high, where it
changes into a single skin on the neighbours half of the party wall,
and next-doors ceiling joists fully penetrate this skin. I filled in
the gaps around these joists with foam when I demolished my old out-
house.
I intend to tie in a new wall that is 90 degrees from the party wall
using a wall starter system.
What I need to do is modify the upper section so it is effectively a
9" wall in order to properly isolate next door from the cavity. I
probably cannot chop out bricks from her wall in order to form a
standard bond with regular headers etc.

So what is the best way of tying in a new skin to to create a 9" wall
to the satisfaction of the BCO ? Bearing in mind that this new skin
will then further become one side of a cavity wall (i.e. it will be
tying in 2 directions).

Thanks,
Simon.

I would advise, have a word with the BCO who covers your area,
probably not the first time this has arisen, and they ought to be
able to help on details like this. It may even be covered in one of
the approved documents. Best to sort all these sort of details before
starting work, no nasty surprises then!