The length of the project usually depends on the size of the roof and the type of roofing materials that are being used. Typically, the prep work and installation should take anywhere between a few days to over a week to fully complete. You want to make sure you ask your Silver Spring roofer this so you are both on the same page as to when the work begins and when you can expect it to be done. This is especially important so you can plan accommodations for pets or children that may be bothered by the loud noises.