I'd like to replace an exterior door to a shed, without buying a whole new custom door. The concrete opening is a standard width but only about 1850mm high, which is too low for most uPVC doors I see secondhand (2m+). Enlarging the opening isn't an option.
If I buy a door and frame that are too tall, how hard is it to cut them down? If it's a half glazed door, I could take out the lower panel and trim that. But the surround and the frame will need mitreing down - is it feasible to take them apart non-destructively or are they likely to be glued such that I have to tear it apart with a saw to get them out?
It's a shed so doesn't have to be perfect, but am I more likely to end up with a pile of mangled plastic than a functioning door? Thanks Theo