No need to cover portions of the open wall even in frigid climates. Mine has worked very well in the upper midwest for several years.SplendidDogFeet
Since you are in warm zone,,, consider an open air addition to your coop.
I do not know how you coop looks currently,,, but consider making your finished structure with 3 walls, and 4th wall, hardware cloth covered. This way no need to have fans, (that need electricity to run).
And when cooler temps arrive during winter season. Texas does not get frigid, but cool. You can cover somewhat the open wall portion with tarps, but not totally. Leave a large gap up high open, for natural air ventilation.
Ask anything that I stated. I tried to explain as well as I could.
WISHING YOU BEST,,,,,,,,,,,,,,,,,,and
With three solid sides, the rain and snow do not come in beyond a few inches no matter how hard or which direction the wind blows- the wind can't blow through a dead end. If the few inches bother, one could use wider eaves and extend a sidewalls a few inches.
If I lived in Texas, I would open parts of the three solid sides in ways that could be closed during Snowmaggeddons. Doors, windows, eave vents, and the like.
It isn't hard. I have a pair of doors on one of my three "solid" sides that are each 3' wide. They open 6' of the 10' side of the building for the handful of days per year that it gets above 90 here. The rest of the time, one is closed and the other is my people door.
In warmer climates, such doors could be put on more sides.
Windows are a little fussier, at least the way I did it. I leave the window hole open from spring to fall by taking the entire window in its frame out and storing it in the basement (or inside the coop). Maybe this summer I will upgrade my window system with hinges or such instead of the current wedges and nails way.
