Coop roofing advice...

I appreciate all of the advice! As I've mentioned before, this is probably the best forum, for any subject matter, that I've ever participated in!
Anyhow...here in Maryland, we have scorching hot/humid summer, and bitter cold winters (ice is usually more of an issue than snow)...we live on the Eastern Shore of Maryland...the Delmarva Peninsula...our farm sits right on the water, just east of the Chesapeake Bay, which influences our weather in some pretty crazy ways!
I realize that raising hens is a hobby for many...I've seen some pretty elaborate "coops" if you can still call them that! lol Although we love our chicks, they are primarily just another step in our family's quest for self-sufficiency! I have very little money to spend on building supplies, and most of my materials have been reclaimed...
As you can see from the pic, it's progressing nicely...I have about 3-4 weeks before they are ready to go to coop, and I should have it completed by then...I home school one of my two children, and this coop has been a great home school project...raising the chicks, designing the coop, and building it, has been worth an entire semester of math, science, and even art lessons!!!
I decided to simply add a 1x3 to the top of my front wall...this provided adequate pitch for the roof...I then installed 3 rafters, and a plywood roof...I still haven't decided on the roof yet, but I will likely go with tin if I can find any, or PVC/rubber if I have to purchase it.
Nearly the entire rear of the coop consists of two large doors to access the nesting area and for clean-out...each side of the coop has a 12"x12" window that will be covered in wire as well as a door which can be opened and closed...we also acquired a large dog kennel which the front door will open in to...it will be covered to protect our flock from the large number of bald eagles and red-tailed hawks that we have here on Mill Creek!
Very nice and workmanlike. That'll do nicely. That pitch is a tad low to suit me, but it is calling out for a felt/rolled roof.
If you try this, add sealed fascia to the plywood edges, as water has a bad habit or rolling an inch or two under a mild pitch. Plywood is great stuff, but it is most susceptible to water damage at its edges. A sealed fascia would help with that.
A simpler alternative is some drip edge all around. Its not as visually appealing as fascia, but it can be fashioned from regular flashing or you can purchase it as pre-formed strip.
If you go with tin, I'd suggest papering beneath, using sealed screws and giving it an overhang of 2-3" beyond the plywood.
 
Very nice and workmanlike. That'll do nicely. That pitch is a tad low to suit me, but it is calling out for a felt/rolled roof.
If you try this, add sealed fascia to the plywood edges, as water has a bad habit or rolling an inch or two under a mild pitch. Plywood is great stuff, but it is most susceptible to water damage at its edges. A sealed fascia would help with that.
A simpler alternative is some drip edge all around. Its not as visually appealing as fascia, but it can be fashioned from regular flashing or you can purchase it as pre-formed strip.
If you go with tin, I'd suggest papering beneath, using sealed screws and giving it an overhang of 2-3" beyond the plywood.
If you go with a felt roof, here's a suggestion for the edges if you have some spare tin lying around:



This is not done entirely correctly, i have a piece of trim on top of the roof with a rectangular profile, it would be better with a triangular profile, but my circular saw is a combo thingy which doesn't allow the table to be tilted to make a triangular profile. You install triangular trim around the side (and top) edges BEFORE installing the roofing felt, then you install the felt and let it rise up on the triangular trim (rectangular in my construction). Then you install a tin profile on top of it, reaching all the way down to the level of the rest of the roof. This way the sides are protected, since the water would need to rise quite high to reach over the felt. I think this works better than just nailing the felt over the edge, because after a few years the roofing felt tends to start cracking around the nails.
 

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