Andy Hall wrote:
On 2007-05-17 12:23:10 +0100, Stuart Noble
said:

But, to go back to the original point, it is indeed surprising that
*any* thickness of insulation makes a huge difference. The problem is
the lack of any material that you can stick on the wall and decorate.
I lived in a house with polystyrene lined walls 40 years ago. Cheap
and easy, but so vulnerable to knocks that it wasn't practical. Even
then people were lining their walls with vinyl cushion floor. I lined
an exposed room with cork in the 70s. Difficult to believe there
aren't better solutions out there now.

There are. It's called Celotex.

Not that different to polystyrene in texture



The question then becomes one of how much is one willing to lose from
the room dimensions.



50mm sheet would go some way towards modern standards. Installation
would imply 75-100mm reduction in room dimension once finished. There
are then the joinery (window reveals and skirting) and redecoration
issues (walls, floor coverings, ceilings) to address, so although simple
in principle there is a lot in the implementation.


What is needed is a material less than 10mm thick so that the dimensions
of the room aren't seriously affected. The ridiculously expensive
astro-foil might be an answer if it was more rigid and could be painted.
Some kind of synthetic cork possibly.