Steve Walker wrote:

Al 1953 wrote:

Engage Father Jack Mode....

Before I assemble the doors, I could do with some advice on joining and
finishing. I've ourchased waterproof wood glue, thinking I should glue
the grooves before tapping in the tongues, I assum this is correct?

YESH!

Hmm, I'm not sure about that. If using T&G I wouldn't glue the tongues
because te wood is going to move and it's probably best if it's as free
as possible to do so. If glue is used the wood may split.

I made a wooden garage door using similar materials a few years ago. It
still looks good. It was nailed rather than glued.