Will be over boarding 3x bedrooms with 9mm plywood as well as the landing they share which leads to the staircase. The bedrooms themselves will have engineered wood flooring laid on top of the plywood in a herringbone style. The landing however will be carpeted.
What I can't quite get my head around is how you account for carpet grippers and where the landing meets the top step.
With the carpet grippers on top of the 9mm ply, there is going to be a visible portion of the side of the plywood where the landing borders spindles/top step. I am guessing you leave a small margin (inch or less) so that the carpet can be folded over the side of the ply and stapled in place?
When it comes to the top step, my current thought is to stop the plywood short of the step itself and have another lip, but perhaps better to run the ply right to the edge of the top step and carpet over the lip that way.
Sorry if none of this makes any sense!