On Saturday, 23 July 2016 15:37:26 UTC+1, TimW wrote:
I am thinking of making some insulating panels wrapped in fabric which I
can mount between the joists of a glass roof extension just with velcro
or pegs or plastic strips or something, so exposed to the inside of the
house. Maybe polystyrene plus a thin foil layer, maybe just
polyeurethane - Celotex type material, maybe something else like mineral
fibre between sheets of hardboard. should I worry about odours? does
celotex smell? and should I worry about fire resistance?. Is there any
reason why these materials can't be used uncovered by plasterboard?

tim W

If you want more detail - a glass roofed extension is too hot and way
too bright in Summer and a bit chilly in winter. Glass panels (something
like 6mm, 20mm, 6mm with coatings)sit on painted joists about 150 x 40
at 850 centres. Have been thinking about blinds, stuffed fabric things,
elastic and pulleys but I think the cheap, simple and effective method
might be to cut foam panels, cover them with fabric sit them between the
joists on L section plastic or aluminium strips. they might need to be
brought down for cleaning but I suspect once they are in place they will
stay in place Summer and Winter reducing the glass area and insulating.

Polystyrene is a disaster in a fire. It spreads it rapidly, producing thick toxic smoke. I wouldn't consider that option.

Some sort of blind is proably all it needs.


NT