"Pet @ www.gymratz.co.uk" wrote in message
. uk...
Mike wrote:
Assuming you mean fibre or Rockwool, that doesn't even meet the current
building regs, let alone actually make a real attempt to save energy.
265mm
is needed so regard 300 as a min.

Surely the gains of going from 200 to 300 mm of rockwoolor whatever
would be pretty insignificant compared to heat loss through walls and
windows in a 70's construction house?

In a bungalow, the biggest heat loss is via the ceilings as that is the
largest area. it is worth making the ceiling air-tight, sealing around pipes
and ceiling roses, and filling up to 400mm of rockwool. It will keep the
house warm and cool.


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