jim wrote:
On 26 Sep, 13:55, "george (dicegeorge)" wrote:
thanks everybody for advice and for discussion-
the bit behind the rayburn is the hardest to insulate so i'm
concentrating on that,
the rest of the walls and windows could do with some too
(and when i repair the ceiling the major heatloss through the
floorboards will be cut).

However its just occured to me that maybe
I could put kingspan on the outside of the building
because that wall is ugly outside, and is badly rendered
(thereby using the brickwall as a heat store)
[g]


except the wall will act as a heatsink down through the foundations
and up into any more wall above it?

I'd concentrate on the inside.

cheers
JimK
(PS note bottom post)
But if a yard length of wall is 10 feet high and 1 foot wide
then the heatloss through the side will be 10 times that through the
bottom or top,
but halve that because the inside wont be as cold as the outside,
plus the ground is warmer than the outdoors,
plus wind and rain on the wall cool it even more,
thus it is worth insulating outside of the wall
if I am ever to re-render it etc
[g]