One of the great things about our company is that all of service trucks are fitted with debris haulers. This means when we leave each day we take the mess with us.
There is not much you need to do. Upon arrival our crew will remove patio/outside furniture and tarp the area to protect vegetation, landscaping, and/or patio surfaces. The only thing I would suggest as a precaution is that interior/exterior fragile wall hangings and collectibles be removed from the wall prior to the start or your roof replacement / repair.
As with any construction project, please be cautious when walking through the area. While we make every effort to keep the area clean, it is possible to have small materials that could be stepped on.
Normally the process takes just a few days after we receive your notorized NOC.