How dark is too dark?

This old hippie that I work with wants me to tint his window, 5'x5',on the front of his house. I havent seen it yet, but he said there is a sidewalk that runs right along that window and he wants it so when people walk by they cant see him smoking his "peace pipe". If it is NOT in direct sunlight , will "5% charcoal non reflective" cause breakage? Sorry if this has been covered before, but I couldnt find anything... Thanks,,

is the window dual pane or is it single pane? Is it annealed glass or is it tempered? which way does it face?

you could use something like a slate 10. dual reflective. plenty dark, plenty of privacy, and safe for installation.

He'd better not smoke it at night with his lights on...

that's what i get for skim reading...i was thinking sidelite for some reason. if it's a big front window then good luck. blinds work well plus you can get a cheap blind anywhere. it'll save him money that he can spend on more weed.

Take a flight to Holland and he does.nt have to cover up smooking weed.

"Coffee" shops plenty over here dude.................................