certainteed plybase can be used as a base sheet but they recommend using primer on the deck. its the reason why i'm buying nailbase now because i dont want to adhere straight to the deck. it would be a pain in the ass to fix the roof later down the line.
Next time you hire a roofer , make sure he's licensed , insured , bonded , at least if he makes a mistake he's liable for damaged to the interior of the property and you can take him to court , with these clowns , you're fuc...k if he makes a mistake
Roofing fails cause a lot of damage to the interior of the house, plus you have to walk on steep roofs , under the heat , rain 🌧️ etc , what about plumbing?