In high heat tarps will burn grass badly as well.
I use tyvek because it’s breathable and won’t burn plants grass during super hot days.
I pre wet, use tyvek against overspray, and rinse after. You can also bag gutters to catch run off or use gypsum pellets to neutralize.
You can also use this. Plant Wash
There’s a lot of discussion in the forum about cleaning roofs. I would never use full strength SH on a roof. 6% max and that would be…a crazy bad roof.
