On Fri, 23 Jan 2004 11:08:45 -0000, "IMM" wrote:


"Andy Hall" wrote in message

I was going to suggest the Knauf U value calculator normally available
as
a
trial version from
http://www.knaufinsulation.co.uk/ but it is unavailable at the moment
as
it
is apparently being updated.

It may be worthwhile checking the site in a week or so if you \re
still
interpreted.

The point is that the house has to be viewed
as upper and lower floors. the
difference in the upper floors is marked
in most houses.

Heatloss through walls of the same construction, accounting for
temperature variation, varies depending on whether you are upstairs or
downstairs?

Grow up! The rooms in the upper floors have a large area that is the
ceiling with a cold loft over in winter and hot loft over in summer.

Yes, and all the exterior walls and windows have an even larger area
that is hot in the summer and cold in the winter.

Insulate the loft heavily and heat loss in these rooms reduces considerably,
giving superior comfort conditions in winter and summer, moreso than the
ground floors.

Please provide the figures to demonstrate that assertion.



If you are saying that adding insulation where there was none before
makes a significant difference to the overall effect in the house, I
will accept it. I don't accept that insulating up to 300-400 mm
rather than 100 or 150 makes a huge difference to the *total* for a
house because the figures don't support that.

If you can demonstrate, for an existing property, (not an
eco-special), with independently verifiable figures and quantitative
references that doing what you propose makes a difference of more than
a very few percent then there is something to discuss.

Otherwise you are just doing your normal arm waving with nothing
substantial to back it up.




You didn't know that did you?



---

..andy

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