Re: Laying vinyl on particle board?
I suspect you have an Oriented Strand Board ( OSB ) subfloor and not particale board. For flooring applications 1/4 inch particle board is used as an under layment when vinyl or linoleum are laid because of the relatively smooth surface.
If the under layment has an uneven or rough surface this would telegraph through the finish material.
In your case if the subfloor is somewhat uneven and rough level it out as much as you can and secure the fasteners then apply an under layment such as the 1/4 particle board or popular. You will need an appropriate filler for the seam joints.
Apply your vinyl over top and should result in a nicely finished floor.
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