"Tony" wrote in message
...
Anyone any experience of using stuff like Thermilate
(www.thermilate.com) - an additive for paint that provides a significant
insulation effect, or so it is claimed?

It claims to keep the heat in by reflecting radiated heat back and providing
an insulating layer of hollow beads embedded in the paint. You're bound to
notice the slightly bumpy finish to the paint when it's done and I wonder
how effective a 1mm thick barrier of hollow beads can be at insulating.
Having said that it's not a lot of money and I might be tempted to try it in
a small room.

Rgds

Andy R