On 20/12/2020 23:30, Theo wrote:
I have a loft conversion with a sloping ceiling up against the rafters.
Going over it with a thermal camera it can see the rafters, and it appears
some of the bays have been 'forgotten' in terms of insulation - on a cold
night and the room heated, with the rest of the walls at 16C, the cold bays
are at 13-14C. Moisture I measure at about 15% all round, so I don't think
it's damp.

It would be good to sort out the cold spots, so I'm wondering how to
insulate:
....
2. Take down the ceiling and add Celotex from below. Still drastic, and I
don't know if there's any asbestos in the (1970s) ceiling.


This one is the best compromise between cost and function
....




--
"I am inclined to tell the truth and dislike people who lie consistently.
This makes me unfit for the company of people of a Left persuasion, and
all women"