On Mon, 5 Dec 2016 17:21:01 -0800 (PST), wrote:

On Monday, 5 December 2016 18:54:51 UTC, Simon T wrote:

Just a thought, would insulation foil do it, like the stuff they put behind
radiators?

It is liable to get rather warm in there though, doesn't this stuff have
plastic bubbles on the inside?

Don't want melted plastic oozing out of the bottom, or worse, black smoke
coming out of the top.

Nowhere near enough insulation, and the core gets way to hot for such stuff.

NT

I added insulation to a storage heater because it shed almost all of the
heat in about 8h, so useless in the evening.
Used some rock wool or glass fibre from the loft. Obviously not space for
much but it made a hell of a difference.
Might be worth looking at something like soldering mats to cover the top of
fibre insulation if there's any easy path for fibres to be carried out by
convection.
--
Peter.
The gods will stay away
whilst religions hold sway