dg wrote:
Phil L wrote:
wrote:
My extension will be built against the neighbours party wall, so
visually, I will be extending the rear wall from her extension
across mine. Her extension is built in the older 73mm bricks I
think,
My design is standard 65mm bricks and 215mm high blocks inner leaf.
The design is to use wall starter plates anyway, to avoid cracking
with the different foundations, so there will be some visual
discontinuity there anyway. But should I just use 65mm bricks and
have the join looking rather obvious, or try to use the 73mm bricks
? I'm not sure how this would fit with the inner leaf. Can you get
taller blocks ?
TIA,
Simon.
You just get normal ties and normal blocks, this is something that
brickies have to contend with every day, they just bend the ties up
or down to reach the course of brickwork, this is normal procedure
and the BCO will have seen it thousands of times.
They'll look like this after it's built:
_ ___
____/
OR:
____
\____
Where the / or \ is the cavity.
A properly constructed cavity wall should have the ties at 90 degrees
vertically and horizontally to the face of the wall. Bending the ties
is not good practice, and if they are angled to the inner leaf, then
moisture can run down to the inside wall. In addition, bent ties could
allow greater differential movement of the two leafs.
Its not normal practice, it is bad practice
dg
I didn't say it was good practice, only that it is common practice inthat
almost all brickies do it, it's the main reason why the old galvanised
'butterfly' ties were withdrawn about ten years back and replaced by
stainless steel, because they rust away where the brickie has give them a
clout with his trowel bending them to fit in with the courses.
I doubt the possibility of water ingress too, considering they have a
dripper in the centre