In northeast nj and pass by couple of new houses in mid construction. People are still working on them and some are without the masks. Depends on how strict distancing is in your area I think. Another town, a police car started keeping watch at a busy cross section, I think making sure everybody has masks. My townhall is closed and business by phone only. I doubt anybody will enforce permits, esp the roofing. Town inspectors usually just eyeball them anyway. Wear the mask when talking to a contractor, practice distancing (not as if I was shoulder to shoulder before:smile

and I think business as before. This is not like being inside an office or restaurants. Roofing materials are usually stocked in large amounts and it's not like we use them to cover mouths.:smile: I doubt there will be changes in labor or material. It may go up, if counting protection costs. Roofers, carpenters, and such didn't have a steady work anyway. As always, at least 3 estimates, get to know your roof, review the estimate (as details) with us, and call and confirm the insurances.
Ask also, if you want, for them to cover mouths with a towel or cloth - if you and the family are home, if no mask, and keep your windows closed. With debris falling off, the conditions don't change.
You can't wait for somebody to tell you that you can move around. That is until the vaccine is made and made sure it works. Social distancing is hoping the virus percentage goes low enough to keep the infection rate down.