sm_jamieson wrote:
On 20 Jan, 15:38, "Phil L" wrote:
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.

short screw-in ties, stainless steel, or galvanised.
If you intend building the skin from bricks, the ties will have to
go in the horizontal joints, but if you build it from block, they go
into the bricks themselves, which makes a better job....make sure
you use short ones or they may burst through to next door.

http://www.bluebird-fixings.ltd.uk/galvanised.htm

Thanks, can you explain how when using blocks, the ties go into the
bricks ?
I cannot visualise this.
I will build most of the skin out of blocks, some brick at the end,
where they would show.
Simon.

The screw in ties fix better to bricks than to mortar, so it's best to space
the blocks so that they don't line up with the horizontal joints of the
brickwork..there's a small pic he
http://tinypic.com/view.php?pic=2wgsz5y&s=3
You may have to start off with a piece of block first so that the spacings
are correct, thermalite are easy to saw using an old handsaw.