unfelted slate roof - insulation

[Arthur]

Hi all. The only idea I've seen is an aluminium coated bubble wrap. But I've been unable to find a source for it. If you know one please post a link.

Or is there a better idea out there?

Thanks.

Arthur

[chris French]

In message , Arthur writes

what is it you want to do exactly? Are you specifically wanting to insulate under the roof, rather than the above the ceiling?

[Arthur]

To pin something to the rafters as a substitute for the felting. With HIP's on the horizon I don't want some pencil neck putting a 'big red cross' on my HIP document. I might go to a full conversion to an attic without window to make a clean storage room.

I've just found this

appears to give good advice. Arthur

[Andrew Gabriel]

The felt isn't there for insulation.

[The Natural Philosopher]

Indeed.

To replace its functionality, simply tack plasterboard to underside of rafters.

If doing a pukka job, put celotex between the rafters first and seal it.

[Arthur]

I want to put floor panels down but I can't leave it at that. Anything I store up there will be smothered in cobwebs within 48 hours.

Arthur

[Arthur]

Will 25mm be adequate or should I go for 40mm?

Arthur

[The Natural Philosopher]

depends on how warm you want it..