Trimming over insulation

[Tobias13]

Removed the carpet from my high top and no insulation, once I've insulated (double foil) can I apply carpet direct to that??

No fixing points for ply as I've seen in other threads!

Thanks for help!!

Tobe

[Smosh]

I believe you nee to ply over the insulation. The insulation wont take loading that well afaik.

[Tobias13]

Damn, carpet was directly on the fibre glass roof so no where to attach ply!!

[nicq]

The insulation goes above the fiberglass. You don't need ply.

[Smosh]

Sorry, did read the OP properly! I was talking about the floor!

I suspect you can fix the carpet to the fibreglass roof but I'm still not sure the carpet will bond to the insulation properly?

[Tobias13]

Yea , current carpet was spray glued to fibreglass roof , but I want to line with foil and carpet!!

No fixing points for ply!!!

[kevtherev]

use styrene foam instead?

sikaflex the lot together

then carpet it

[nicq]

They are glued to fiberglass and insulation between fiberglass and roof.

[Tobias13]

Nicq,

No sure I'm following mate:

They are glued to fiberglass and insulation between fiberglass and roof.

The roof is fibreglass! It's a high top!!

Kev,

Sounds like a good idea, is this tried and tested in the community??

[kevtherev]

Kev,

Sounds like a good idea, is this tried and tested in the community??

All Autosleeper high top glass fibre roofs are insulated this way... the foil type wasn't invented when they were fitted out.

There are lots of ways really.
Use the sikaflex to glue thin wooden battens to the roof, then glue the foil type insulation between the battens.
you can then board over the foil using the battens to fix the 3mm ply boarding to.

I think you get the idea

[kevtherev]

this looks good, honeycomb insulated board.

[Tobias13]

Cheers Kev,

gluing the strips and ply lining sound like a good option to me!!

[Ceecee85]

And don't forget to use a vapour barrier otherwise you'll get damp bits.
From the outside in: fibre glass, insulation, vapour barrier, ply lining, finish.

[Tobias13]

Does the double foil insulation act as vapour also??

Was told it did!!

[Jonnyb416]

I would have thought so, yes. Surely the vapour barrier is only needed if you are using the fibre glass type insulation.