On Mon, 21 Sep 2009 19:15:24 +0100, Hugo Nebula abuse@localhost
wrote:

On Mon, 21 Sep 2009 01:46:23 +0100, a certain chimpanzee, David J
randomly hit the keyboard and produced:

I've got a detached house with an integral unheated garage, built in
1997 with the insulation standards of that time. The garage door is
up/over with considerable gaps, so that in winter the garage interior
is notg much warmer than the outside air.

All the interior walls in the garage are made of a thermal block
material, but I am unsure if there is also an insulated cavity on the
house side. I suspect not, as it is probably considered to be an
internal wall.

The 'garage side' walls of all the house rooms adjoining the garage
are noticeabily colder in winter, and I am wondering if it would make
sense to clad the garage/house wall with some form of insulation on
the garage side.

For the thermal insulation requirements of the Building Regulations,
any wall between a heated and an unheated space should be insulated.
There is a small insulation value for the still air within the garage,
but the insulation of the wall between the two is usually the same as
for an external wall.

That is of course no guarantee that the walls have been insulated
properly.

Very interesting.

The outside wall of the garage is brick faced and continues to the
rear of the house to become the wall of the utility room. Above are
bedrooms. So I have to assume that an insulated cavity with thermal
blocks as the inner leaf is the construction of the entire wall here.

It's rather perverse for the builder to then install a single thermal
block wall on the division between the unheated garage and the house,
where the insulation is really needed.

I have already discovered that the builders failed to insulate the
small roof cavity above the downstairs toilet, which has a tiled roof
at the first floor level - so corners were cut where possible..

David J