I'm about to complete the ceiling with plasterboards but there is
> going to be an air gap between the boards and the insulation above
> (about 40-50mm) and I was thinking of completing the insulation shell
> from the walls (which hasn't yet been installed) to the loft (so to
> limit cold bridges) - this means that the ceiling boards don't touch
> the walls but are about 50mm from it...so the wall insulation can be
> connected with the loft insulation.
> This should reduce cold bridges, but there are metal joists on 2 sides
> of the house which can't be insulated- is it still worth bothering
> trying to complete the insulating shell as much as possible and leave
> the metal joists as they are? I was thinking of wrapping them in
> insulating aluminum foil (bubble wrap), but it is rather awkward right
> now and to achieve that I'd have to remove the ceiling boards.
>
> The property is an end terrace house (so 3 external walls) with walls
> with air gap of about 30mm....the insulation on the loft is typical
> glasswool 200mm and the one to be installed on the walls is celotex > 50mm. >
> Any help?
as clear as mud. As well as insulation to consider there are also damp and ventilation isues often involved.
NT