"Andy Hall" wrote in message
news
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.

They generally do not. Most it is about equal in area. My main bedroom
has a very large ceiling area. More than the walls. And when you take into
account much of the outside walls have build-in wardrobes across them, there
is not much wall area at all compared to ceiling area. Most homes have
built-in floor to ceiling wardrobes these days, with many of them against
outside walls, which gives an extra level of insulation against the outside
walls. Packing in loft insulation for the benefit of the upper rooms is a
win, win, win situation, giving greater benefits to these rooms than others.
It is worth alone just for these rooms.

As I have told you. Last August in a heat wave, the coolest roomin my house
was the main bedroom. The insulatio above proteced it from the 55C in the
loft above. A breeze runningthrough the uper windows, which are beter for
breeze being higher up, and it was very comfortable.

Many selfbuilt homes have the living areas on the upper floors, which makes
much more sense.

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.

Depends on the house in question. 90% plus will benefit and many others
will greatly benefit.

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.

You are a thicko! The upper rooms greatly benefit, of which there is
usually 3 or 4 bed and one or two baths. You make the silly mistake of
looking at the whole house and treating it as one with all rooms being
equal. Big mistake.



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