On Dec 31 2011, 12:11 am, Tony Bryer <
t...@delme.greentram.com> wrote:
> On Fri, 30 Dec 2011 23:21:30 +0000 Steve Walker wrote :
>
> > Our 1935 house and the 1934 bungalow next door have cavities, my
> > parents' 1935 house 3/4 mile away has solid walls. According to
> > previous threads here, quite a few Victorian houses have cavities.
>
> > It's all a bit random really.
>
> In New Malden, where I was once a BCO, cavity walls only became the
> norm in late 1930s, though I did get involved in one Victorian property
> that had them. A colleague who joined us from Portsmouth was astounded
> to find this - apparently cavity walls had been the norm there from
> much earlier, but perhaps not too surprisingly as the original reason
> for adopting them was damp prevention, not thermal insulation.
>
I've heard it suggested that the emphasis on fire prevention in the
London building acts had ther effect of discouraging the use of cavity
walls in the London area - and possibly in other cities which had
suffered from major fires - but I haven't been able to find written
evidence to back that up, though that may just mean I'm not looking in
the right place.
It is certainly true that my first two houses (both in Hampshire, and
both pre - 1914) had cavity walls, while my parents pre -1945 housein
London and also my current house in Northants (pre 1914) have solid
walls.
I remember finding advertisements for wall ties when browsing through
an old (around 1910) volume of 'The Builder' or some such title which
I came across in a secondhand bookshop; many of those were however so
short that they didn't allow for a cavity. Apparently the idea was
that using these reduced the quantity of expensive facing bricks that
you had to use, and also made it easier to get two fair faces on a
wall - if you're building a 1 brick thick wall it's very difficult -
if not impossible, with the hand-made bricks available then - to get
the end faces of a header to line up with the stretchers on both sides.