I am remodeling an upstairs bathroom and have removed the old floor. The subfloor is 2x6 planks between the joists. They are nailed into 2x4s that are sistered to the side of the joists. Has anybody seen this type of subfloor before or know what it’s called?
I plan to lay plywood, cement board then tile but some of these planks are sticking above the joists so I would like to just pull them up to have a level surface to work with. The outside planks go under the walls but seem to be loose and resting against the joist that runs under the wall so I don’t believe they are holding any weight. Do these planks serve any purpose? Am I weakening the floor by removing all of these?