subflooring

tmac123 · 16 May 2021

Hi there
Taking all my flooring up (T&G) and exposed the suspending floor joists.
Can i lay a 9mm OBS as a first layer and then an 18mm T&G on top?

thank you

Notch7 · 16 May 2021

If the 9mm is only a packer you could just put strips on the joists.

tmac123 · 16 May 2021

It is a packer to bring up to height, but i was trying to add more strength and firmness.

Is it ok to add it that way around
9mm underneath then 18mm on top?

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subflooring

tmac123

Notch7

tmac123

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