Before you can begin to update your roof, you will have to get an accurate measurement and order your materials. Always try to measure from the ground first in order to keep yourself safe. If you must climb onto the roof to measure the space, be sure to use caution. In addition, if you don’t feel comfortable climbing on your roof for any reason, contact a roofing professional to perform any needed inspections or maintenance. Use our measurement tool. Then, refer to this overview.