Proper drip edge flashing is needed to divert water away from the fascia, roof deck, and rake boards. The International Residential Code has mandated drip edges since 2012 to ensure water is directed away from these areas. •Designed with performance and durability in mind, our pre-notched T-Style drip edge is extremely effective at guiding water away from the roof while meeting IBC and IRC building code requirements with overlaps without notching.