Less than a year ago, we bought a new hall door from from a large reputable Irish door and window supplier. It cost about e1,000, for the door and frame only, excluding door furniture and fitting.
It's hardwood , about 45mm thick and was supplied by the company but fitted by a builder. It came primed and with a note to say that it needed to be glossed within 6 months, which we did. We fitted a regular 'yale' type lock and a 'chubb' type dead lock.
All looked fine at the start but in the last month or two, since it's gotten cold, we've noticed that cold air blasts in at the top and bottom corners of the door (lock side, not hinge side).
Examining it closely, from outside, when the door is closed, there is now a gap of about 5mm at both the top and bottom corners, between the face of the door and the draft excluder strip on the door frame. You can also see daylight at the corners from inside the hall when the door is closed.
If you look along the vertical edge of the door when it's open, there is now a slight 'c' shape.
It's also quite springy, as in, if you push the top corner from outside, when closed, the top bends in, so you can slide your finger between the front of the door and the draft excluder/frame that it's supposed to close against.
Obviously in the middle, at the lock, the door is still tight against the frame.
Is this normal?
I know it wasn't the dearest door in the world, (and I think they did have an option of a thicker door, which unfortunately I didn't go for) but surely you would not expect it to warp this much in the first winter?
Should I go back to the manufacturer or try to fix it myself, maybe with extra draft excluder etc?
R