SERVING ALBERTA'S ROOFING INDUSTRY SINCE 1961 OUR MISSION To serve the Alberta roofing industry by providing leadership through the development and promotion of standards, education and professional delivery of roofing services. ARCA WARRANTY Our 5, 10 and 15-year warranty plan is a workmanship warranty against leaks on ARCA accepted Low Slope, Steep Slope and Architectural Metal Standing Seam Roofing Systems installed in Alberta.