Cavity Wall Insulation Slabs for loft?

[DerbyBorn]

I have a pack of left over 75mm Glass Fibre Insulation slabs from the building of my extension.

Is there any reason why I shouldn't use them to top up my loft insulation? (Superglass - Superwall)

[Martin Brown]

They are a bit on the heavy side for in a loft if they are the dense things that I think you mean. But if the beams are strong enough...

[mark]

I used the left over cavity wall batts as extra insulation in my loft.

mark

[harryagain]

No reason whatever, carry on.

[Jim K]

just what do you think he means?

Jim K

[Martin Brown]

Compacted glass fibre slab for putting in walls. It is a lot heavier per unit area than the fluffy stuff you usually put into a loft. I suspect it would go right through the ceiling of a modern build house.

[Jim K]

got a link?

if "compacted" how does it work as an insulant then?

Cavity batts don't weigh anything like enough to bring a ceiling down.

I think you're thinking of something else...

Jim K

[alan]

75mm solid glass?