BigWallop wrote:

If the wall is getting that hot, then something needs to be done
before it gets
worse. The pre-cast flue is made of what? Is it an old chimney
stack?


I must be in a brain warp he as I see it, a hot stack is a _good_
thing, it means youre recovering more of the heat out of the appliance,
making its heating more effective, more powerful, reducing gas cost and
emissions.

If your paint cant take the heat, use some that can. The coal burner I
used at one place made the metal stack roasting hot, lovely, all that
heat. Luxury. It was finished in high temp paint, black to maximise IR
radiation.

Its no more of a safety isseu than having a kettle, those get hot too.
No idiot touches it twice. I'm assuming the house construction is in
line with the 1924 build regs, with struc woodwork not touching the
chimney stack. Pre 1924 properties noramlly are, as its basic common
sense.


NT