What is the minimum weight of lead flashing required for roof drains according to NRCA?

The minimum weight of lead flashing required for roof drains according to the National Roofing Contractors Association (NRCA) is indeed 4.0 lbs. This specification ensures that the lead flashing is heavy enough to provide adequate durability and resistance to the elements, effectively preventing water infiltration around roof drains. Properly weighted lead flashing contributes to the long-term performance of the roofing system by creating a secure seal. This weight requirement is part of industry standards designed to promote quality and reliability in roofing installations. Thus, understanding these specifications is crucial for roofing professionals to ensure compliance with recognized guidelines and to deliver reliable roofing solutions.