National Association of Home Builders

NAHB Model Green Home Building Guidelines - click here

Version I, Section 2.2 Enhance Durability and Reduce Maintenance Install drip edge at eave and gable roof edges. Intent: The drip edge directs roof runoff water into the gutters and away from the fascia and roof sheathing. Install gutter and downspout system to divert water at least 5’ away from foundation and from there into the overall onsite drainage area. Intent: Moisture intrusion of foundations is avoided by moving runoff water beyond the foundation.