I can't quite make out which dpc you're talking about, you need to fit dpc between the inner and outer brickwork where you close the cavity, but you don't need any around the frame of the of the door or window as they are quite waterproof, when I fit a door I normally set it lower, sticking up about an inch above the finished floor level so you're always tripping over the frame, if the floor is a screed finish then I screed up to the door, just be a bit careful with the trowel.
I never fit dpc around a pvc window or door, the only place it's required is the vertical and horizontal between the internal/external brickwork.
Why is it getting in the way of the floor tiles? Why was the frame not set about 50mm lower in the aperture and tile up to the frame leaving a small lip of 5 to 10mm instead of a 3" pvc frame to trip over?
That's what I would like to know ha would make my life easier. This was here when I move in.
It's in the way because the dpc is above the floor board level and sticks out a couple of mm so I woul have to rise the level by 30 mm in total to finish above it leaving too much of a step.
Good advice from FMT but in your first photo it looks like the boards have not been laid on the joist, could you not raise the joist an inch or two, but i think still a good idea to protect the boards with OSB boards.
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