Building Codes And Permits
Building codes vary greatly depending on where you live. Any roofing project you undertake must comply with building codes applicable to your jurisdiction. Certain areas of the country have region-specific building codes of compliance. For example, Miami-Dade County in Florida enforces building codes to ensure homeowners have the best protection against weather events such as hurricanes.
Before you begin any roofing project, it is vitally important to obtain the applicable building code. Contact your town’s municipal building to obtain the proper building permits and for the correct building codes for your area. If you do not obtain a building permit for your roofing project, you may be subject to significant fines and penalties.
What Materials Will I Need?
GAF has made it easy for you to determine the materials you will need for your new roof. Our Roof Wizard walks you through four simple steps: selecting your shingle style, your shingle color, your warranty coverage level, and your roof accessories.
Try GAF's Roof Wizard
Important Note: The best GAF warranties—including those that cover workmanship of the installer—are only available when a roof is installed by a GAF factory-certified contractor. Find one here. See warranties for coverage and restrictions.
Estimating How Much Material You Will Need
To estimate the amount of material you need for your roof, you must first determine your roof's slope. The slope is the rise over the run. A tool called an inclinometer should be placed on the top ridge of the house and will allow you to record the measurement of the slope. Then you must determine the total square footage. Measure all sections of your roof including the hips, valleys, ridges, eaves, rakes, and any overhangs.
Once you have all your measurements, use them to calculate the total square footage. You can find numerous roof calculators and measuring guides online to assist you in this process. Remember to estimate the amount of tear-off debris you will need to handle as well at this time.
Don’t think you’re up to it? Your best option is to find a factory-certified GAF Master Elite® Contractor near you to do the job.
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Estimating Roof Ventilation Requirements
Deciding on the proper vent and the amount of ventilation needed is critical. Always consult your local building code for balanced attic ventilation requirements in your area.
To calculate the amount of ventilation you need for your home in the U.S., visit GAF's Ventilation Calculator.