I want to build an ensuite and want to build the walls from block not stud. Is there any special consideration needed when building block on to upstairs floorboards apart from making sure all the boards are still removable.
If your wall will be along the joists you must build on top of a joist preferably one which has an additional joist next to it.
If your wall is at right angles to the floor joists fix a wall plate of suitable size and build on this.
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