ROOFING FOR   St. Catharines, Welland, Niagara Falls, Fonthill, Thorold, Port Colborne and surrounding Niagara Region! ROOFING FOR   St. Catharines, Welland, Niagara Falls, Fonthill, Thorold, Port Colborne and surrounding Niagara Region! ROOFING FOR  St. Catharines, Welland, Niagara Falls, Fonthill, Thorold, Port Colborne and surrounding Niagara Region! Niagara Roofers - Knight Roofing - Repair 13 Sullivan Ave Thorold, ON L2V 2Y3 (289) 228-3394