On Tue, 15 Nov 2005 15:13:51 +0000, chris French wrote:

In message , Malcolm Stewart
writes
"Stephen" wrote in message
...

Winter's here so I'm thinking about cavity wall insulation.

Is it worth it - does it make a difference ?


I had my 1980s house done years ago - in November, from memory.
Before and after the big day I recorded the temperature in a bedroom where
the radiators were turned off. I had the bedroom door closed, so it's
heating was by leakage from the rest of the house which was thermostatically
controlled. The bedroom goes from front to rear of the house, and has
external walls on 3 sides with single glazed windows back and front. The
weather before and after installation was broadly similar, and I recall that
my unheated bedroom was noticeably warmer after insulation was installed.

It'll only make it warmer if the heating system can't keep up with the
heating requirements, but it will reduce the energy required to keep it
warem

Not quite. Experiences with solid brick, cavity and cavity imnsualted
houses suggest that (assuming other things like draughtproofing and roof
insulation are done first) the cavity wall insulation improves the interior
wall temperatu In short the cold spots go...and so the overall room
temperature can be reduced without compromising the colder areas.

That's has always been my experience of well insulated houses. More EVEN
temperature, and more confort, at a lower temperature.