Roof vents

[Lisawbsn]

Plastic sheds are notoriously difficult to adequately vent -- 1 square foot per adult, standard-sized hen. Since your shed is 7x7, that's 49 square feet, suitable for up to 12 hens, you need to be putting in 12 square feet of ventilation. The goal is to have the temperature and humidity the same inside and out.

I don't really know how much air whirlybirds are likely to be pulling, but I'm a big fan of Monitors. This article includes making and installing a monitor on a resin shed: https://www.backyardchickens.com/articles/the-scoop-on-a-rubbermaid-big-max-coop.76444/

Would you like to share some photos of your ongoing conversion?

Also, where, in general, are you? Climate matters, particularly with chicken housing. Here in the Steamy Southeast the first thing I'd do with a resin shed would be to completely replace the doors with wire, but that wouldn't be appropriate in cold-winter climates.

We are nearly complete. Adding hardware cloth over outside of window and another higher roost. Once the 2 younger ladies are big enough to go with the rest of the flock the small coop will be removed from enclosure. The whirlybird works great at pulling the air through, sat in the coop last night with the window closed and it was nice and cool. Motion sensor lights around enclosure and over the door for safety, we added extra locks to doors. The Omlet door works great and the girls go in and out all day.

 

[3KillerBs]

. The whirlybird works great at pulling the air through, sat in the coop last night with the window closed and it was nice and cool.

That's great to hear!