Thanks Dave.
The building inspectors just came last week. Seems they are happy with what we did.
In the end I decided to chance it and wrap normal fibre glass around, securing it with those nylon luggage straps and a couple of screws through to secure and keep tight the bands.
Easier...
Hi folks,
We are in the middle of a garage conversion, and have a couple of velux-style windows in the roof.
The windows are about 1 m elevated above ceiling height, and consequently we have boxed in a triangular "shaft" with plasterboard to where the shaft meets the regular ceiling level...