On Sat, 17 Apr 2004 13:36:55 GMT, Ian Stirling
wrote:

The entire roof (at the very least one side) needs re-doing.
So, all the slates/tar-paper are going to be up, and the bare boards are
going to be available.

That was why I was wondering if it might not be a good idea to stick a
layer of insulation in at that time, to allow the option of using the
attic as a room, plus to increase the insulation of the whole house
by the attic warming up a bit.

All that needs doing is relatively minor work round the edges...

If the attic was to then be converted into a room, there would be the
option of also adding insulation inside, for really good insulation.
(paying attention to proper ventilation to avoid condensation)

It it possible to create a 'warm roof' with a tiled roof, but usually
the insulation is put on the inside between the rafters so no space is
lost. A roofing expert would be able to give all the pros and cons. Eg
if you had old roof beams that you wanted exposed in the room then
having the insulation on the outside would give you that.

cheers,
Pete.