bugstruck
Platinum Member
I probably wouldn't use PT for the doors, and I'd use a good wood glue like Titebond. Then I'd soak the heck out of it with wood preservative before doing a good paint job. They should last forever. That's also a good point about attaching your hardware to the vertical stiles.
This whole thread has good examples and advice. I'm using this particular post to make a point on glues in exterior enviornments. Even Tightbond III is ineffective over time if repeated direct moisture gets to it. I've seen it fail in direct exposure with spar urethane as the protectant (pretty decent topcoat) in under 6 months. Not on barn doors but exterior rails and the like. Bottom line is in exterior apps you need good mechanical connections. The glue is more feel good than a real long term performance enhancement. Not to say if you keep it very dry under good flashings and sealants it doesn't work, it does to a degree. But driving rains and slowly deteriorating moisture barrier coats spell the end for it. Get it well connected and you wont' have any issues. Another thing to remember is that truly moisture resistant woods such as Ipe are high in silicates. They don't hold to glue well. I do love glue though. Indoors.