Building a garden studio/outhouse and have ran into a problem with the exterior door. The door I have is an internal 1955x838 oak, but have picked up a standard 1981x838 hardwood frame for it. I can't find any 1955 door frames, and I am keen not to pay for a custom built one due to my budget.
I have thought about extending the door height by gluing some hardwood strip wood to the end - however the area the building is in can get very wet and damp. I am worried this may damage the door with time due to contraction and rot etc, even if I stain and treat it well.
Any advice is welcome, I am well aware that I probably need a new door, but if anyone can think of a way around it it would be much appreciated.