In article , IMM
writes

wrote in message
.. .
In article , Dean Richard
Benson writes
I have just had my loft timbers/joists treated for woodworm, and getting
the house rewired soon. After that is all done, I am going to put
insulation down. However I have some questions about it.

Is there a noticable difference in loft insulation (rockwool rolls) in
insulating greater than a 4" depth? The reason I ask is that my joists
are 4" in height, and anything greater will mean a bit more planning to
ensure that I can still walk and see the joists up there.

Also, has anyone noticed a difference between rockwool and other types,
such as crown wool? I have checked the u-values and such, and rockwool
is
a better insulator, but it is also going to cost me about 20% more than
crown insulation. (b&q special offer).

I really like the idea of using natural insulation such as sheep wool :
(http://www.greenbuildingstore.co.uk/ins-thermperf.php) but the price is
unbelievable.

Any comments/help/advice would be greatly received.

Thanks.

Whilst we are on the subject on loft insulation what's the consensus for
insulating in, around and over the cold water tank? I popped into the
loft the other day to set the traps for our annual tiny footed visitors
and thought I must do something with the tank, at the moment I have the
tank insulated and up on a platform with the patch of loft insulation
removed underneath it, I was thinking of boxing the whole thing in with
ply and some polystyrene sheet fixed to that to form an insulated box.

The usual method is to have a tank jacket and the loft insulation curved up
and to the sides of the tank.

The tank has a jacket but is about 4' in the air on its platform which
is why I thought of putting insulated panels around its open support
structure, I suppose the real question is whether the insulation below
needs to be still left out if the tank itself is insulated well enough
--
David