SPRI, the association representing sheet membrane and component suppliers to the commercial roofing industry, announced that it is revising ANSI/SPRI RD-1 “Performance Standard for Retrofit Drains” and plans to canvass the document for re-approval as an American National Standard.
ANSI/SPRI RD-1 is a reference for those that design, specify or install retrofit roof drains designed for installation in existing drain plumbing on existing roofs. This standard does not consider all roof stormwater drainage code requirements for specific building sites.