On Tue, 1 Nov 2011 12:34:41 -0000, ARWadsworth wrote:

It will be interesting to see what difference the new 50mm of
phenolic foam insulation on the exterior walls makes to reheat
times
and fuel bills.

What sort of payback time are you hoping for for this insulation?

Donno, the final bill for the works will be about 80k, then there is
all the decoration, carpets, new kitchen, batheroom and probably now
a new flat roof(*). I don't have a break down of the insulation costs
from all the other work like new flooors walls doors etc etc...

TBH I'm not overly interested in "pay back", I'd like to see a
noticeable drop in oil consumption but taht isn't the prime reason
for the works. The place just needed gutting and doing to reasonable
modern standards of insulation, it was last refurbished in 1975, so
insulation didn't exist. Just block walls inside the stone walls at
ground floor, plaster board on timber over that or direct to the
walls at first floor. Howling gale in the void from flues and just
the open top into the loft space...

(*) I knew it was getting towards the end of it's life at 15 years or
so. Was sort of hoping to get another year from it but having just
been up it has deteriated since last year... B-(

--
Cheers
Dave.