Now I wonder if I need a door...will it be too drafty?

I'd think you would need a door for two reasons: 1) to minimize drafts and 2) to keep out predators.

 

If you have monster raccoons, which I KNOW you have in Seattle! you need a door to lock them in at night. It is almost impossible to make a run completely coon-proof, they will be much safer if you can shut the door and latch it. You can also put up a small piece of cloth over the door, tie it back a bit at first, then they will learn to duck and get in. This will keep out drafts during the daytime.

 

We have an animal secure run area so there is no access to the chickens by predators. (it's rhino proof) Anyways our coop is an open air design. Check out plamondon.com for his pointers on open air coops. They are much better for chickens and in particular in our area. I'm near Seattle too and the weather is fine even when it is coldest. Cold weather annoys chickens, but lack of ventilation can be deadly. Ammonia builds up from poop and is dangerous to them and the moisture from their breathing is more likely to cause frostbite than cold weather in a well ventilated coop. The moisture collects on their combs and then freezes.

 

Quote:could you show a picture of your rhino-proof open air coop?? I didn't really see all that great of a coop on the link you provided, the pix showed plain chicken wire over parts of the coop and that certianly won't keep out raccoons or dogs.

I myself have gone with an open air coop design, but I have a pretty low predator load here in Suburbia compared to a lot of chicken owners. I used recycled welded wire -- definitely not plain chicken wire.

 

Quote:I have a similar type coop/run, except my run is essentially a wire-wrapped box (it is buried about 12" deep in the ground and the hardware cloth covers the bottom, top, & sides, except for the portion that attaches to the coop & contains the pop door opening). Because of this design, I feel very safe leaving it open continually, so the hens can go out as soon as it's light. However, because of our cold winds, I've stapled clear heavy plastic around part of the run that is closest to the coop & door. This creates a type of "tunnel" for the pop opening - similar to an igloo door - keeping the air still inside the coop. It works well except when the wind comes STRAIGHT at the pop door. Fortunately that hasn't happened often, because the opening faces east.

BUT, just in case we get another deeply frigid winter, like last year, I also have a door on that opening, that can be shut, if necessary. Last year, my neighbors, in order to keep their chickens from freezing in the coop, were forced to put up a pop door that closed.

 

With that small of a coop, sealing it up might cause humidity to sky rocket if you don't have good ventilation, thus increasing risk of respiratory issues and frost bite. My birds are in Everett and during last years freezing weather, all except the oldest and banties chose to sleep in the tarp covered tractor area instead of in the hutch. No frost bite on anyone and they did just fine with just blue tarp as a wind break.