It isn't that hard to build a door, just very detailed and time
consuming. Do a lot of research too as there are many ways to
approach it. I rebuilt one of my former mobile home's factory-built doors
[not a 'standard' house-like door like they use on them now-a-days]
many many years ago, and just replaced the rotted wood with new.
I know you aren't doing that, but the upshot is to try to be as precise
as you can when cutting all the wooden components. I would also
recommend that you join all the pieces like finer furniture - use
mortise and tenon -or a floating tenon - or dowels to join the frame
pieces together and glue them together with waterproof/resisitant glue
then glue on the wooden skins. This is just one approach, but it'd
give you a soild door.
Here a thread from the Foamie section RE: Doors :
http://tnttt.com/viewtopic.php?f=55&t=50524 Cheers,
Norm/mezmo
If you have a house - you have a hobby.