Central California can get hot! I am even toying with the idea of adding shade cloth over my garden during the hot season. The plants that were partially shaded seemed much happier in my garden.
Be careful on which shade cloth you use. I had one on mine last year and it made my plants stretch like crazy. I was bendin them over and and some snapped while putting weight on. This is a 10-13 foot ceiling as it's sloped down hill.
I have been wanting to try a white shade cloth vs a blk one and see if their is a difference.
The way that these guys have theirs is the best way. It allows air to flow through unhampered. Mine has roll up sides, exhaust fans, vents and would get 140 degrees in the summer. Plants did not die but would use a lot of water and would not grow any of course. The shade cloth was instant reduction in temps and growth. I'd like to put another one up that's twice as long and wider. Something like a 36"x 100 lol use the white film like they have for security from above and roll up sides. Didn't think 55% white film would allow enough sunlight to make good bud but I'm glad I've seen these guys do it so I can see it for myself.
On the ends I would have mesh screen on the ends to keep out the bugs, also on the sides as well this allows a good supply of fresh air. I have this on my sides and when closed up nothing can get in even with the sides rolled up.
Moths here can have your plants all decorated with worms before you know it. First year that happened with me in my greenhouse. Make a frame on each end and you can put a door in to move stuff in an out and a walk in door for just entering. Use C channel and wiggle wire for being able to put it up and retighten the plastic after it stretches in the sun.
I just need to find some land in the middle of nowhere that has a well and no nosey neighbors or drones over head lol