On Fri, 8 Aug 2003 15:04:23 +0100, "IMM" wrote:


"Andy Hall" wrote in message
.. .
On Fri, 8 Aug 2003 11:42:42 +0100, "IMM" wrote:



It is a combination of bothg radiant barrier and heavy insulation on the
loft floor. 300mm min.


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Why not fill the entire loft space with insulation?

Andy 400mm is about the max for heating and the payback falls right off
after that, but when taking into accoiunt cooling as well, then put in as
much as you can.

In the context of the insulation afforded by the other surfaces in a
typical property, the value tails off after about 100mm.

Look at the sums for a typically constructed property from the last 50
years and going beyond that is making small changes to a fairly small
part of the total heat loss or gain.



Actually come to think of it, fill the rooms as well.

No Andy that will reduce living space.


You don't normally let that get in the way of principle.




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..andy

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