Do I need these?

Sponsored Links

As per the information on the web page, they recommend 12 fixings per 1200 X 2400 board.
I may be wrong - am only a DIY-er :), but that seems a decent number of fixings to avoid uplift.
I don't think it would be the best idea to fix the boards just around the edges!

I just reread the webpage, 'For a 2400 X 600 T + G board we recommend 8 fixings per board'
Last edited:
Yep but I’m assuming that refers to loose sheets not T&G which will in effect when glued forms a large sheet. Hence only requiring fixing at the edges.
I suspect that a 4 X 6 m board 18mm thick would probably be quite flexible and could suffer from uplift!
And as the manufacturer recommends 8 fixings for a T&G board, I would be happy to go with that.
But they would say that wouldn't they ;)
Sponsored Links
There for fixing your insulation down and helping to minimise thermal bridging.
sent them back, ill screw some 150mm screws through the lot instead, (yes I know slight thermal bridge).

18mm OSB3/VCL/150mm PIR/18mm OSB3//Edpm

DIYnot Local

Staff member

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.

Are you a trade or supplier? You can create your listing free at DIYnot Local

Sponsored Links