We built our own. Use treated lumber (less rot, more expensive), HEAVY hinges to hold the weight, 1/2 inch plywood (3/4 inch is too heavy). Provide “rough opening” dimensions to door builders.
opening is 4 ft wide, top door is smaller so total opening size is 7 ft. Need support around door opening for heavy weight. We use simple hook and eye to attach doors in open position.
Looked briefly on-line - these appear VERY well made:
I have four sets of wood Dutch doors on my barn that need repair or replacement, so thanks everyone for all the ideas! Libby 2563, I really like your doors, especially the wire grating.
Anyone care to share the price for their metal doors?
[QUOTE=Scarlet Gilia;8627433]
Anyone care to share the price for their metal doors?[/QUOTE]
A grand a door for our plyco doors, installed.
I was figuring about $1,000 a door. Thank you.
I think mine were about half that. BUT the Plyco ones look beautiful and I am having door envy now. 
For those that made their own dutch doors, what was the door size vs rough opening size? I was planning to make my own, and can’t believe my barn builder made some openings 49.5" wide and some 49". Think one may be slightly less than 49" too. I see the commercial makers of dutch doors seem to either make them for a rough opening of 48" or 49", and seem to make the door 1" less in width.
Also, how did you attach your hinges to the barn? The builder covered all the outside wood of the openings with metal, I wasn’t sure if the hinge can be put on the inside of the door frame?
[QUOTE=King’s Ransom;8627462]
I was figuring about $1,000 a door. Thank you.[/QUOTE]
I think you’re positioned to do it well at that estimate
My builder didn’t use the latches/handles shown on the Plyco website for unknown to me reasons, and that’s probably my only complaint with the doors. My handles are fine, but sometimes a touch sticky. The ones on the website are pretty sexy looking.
I’m opening and closing my doors daily, too–the bottom door on the east stalls is closed during the day so the horses can run into the runs and use the overhang from the field. The west doors are closed top and bottom so the wind doesn’t come in and blow my bedding around.
I can’t think of a single complaint about the doors themselves. Oh…they were pretty heavy when we were unloading from the truck 
I know its not what the OP is asking for, but in case anyone else is interested, my husband built some wood doors. They are 4 years old now and have held up beautifully! They were custom made to the door entry and they do need repainting this year, but it has held up great. Some of the paint in the window is starting to peel off as our barn gets close to freezing in the winter and the window frosts up, then melts every day when the sun comes out. So the wood there is almost always wet. But it was made to be removable, so all we have to do is remove it and repaint.
We just bought the hardware from system fencing in Ontario.
>>bump<< Is there anyone who can answer my question in post 25?
OTTBs, I did not build ours personally but they were locally built (I bought this place with the barn up but I know the guy now that built it.) And I just measured for the custom bars so I can tell you the size.
My Dutch doors are three feet wide. Well, the opening is 35.5 on two and 36.5 on the third. But the doors themselves are all tight fitted, not sure why he made one an inch wider!!
I find that acceptable, and would find 4’ too wide, but honestly if I was going from scratch I would split the different and do 40 inches. Mine are just a smidge too narrow to get my Rubbermaid wheelbarrow out which is a PITA. I can get it out the 36.5 inch one. Really 40 inches would be perfect.
But the 36 is fine, I have had seniors living in an in-out situation (alone) at night for years with no issues at that width.
You can just screw through the metal to hang them and anything else. Just watch how you do it so you avoid slicing edges. I did it the other day to hang my bars, see the other thread. I used a big bolt with those round things to make sure to cover up all the ends very very well. Used an impact drill and pre-drilled the hole. It is very easy.
48 is such a big heavy door. In winter I like to leave the windows open and it might let too much snow and wind in, if mine were that big I might have to close up.
