| Business | Phone |
| Greenlane Roofing & Contract 250 Green Lane, Thornhill | (905) 731-3695 |
| Perry's Roofing Inc 103 Sixteenth, Thornhill | (905) 881-4106 |
| Richmond Hill Roofing Inc 170 Dudley Ave, Thornhill L3T 2E6 | (905) 881-9050 |
| Bailey Roofing 122 Woodward Ave, Thornhill L3T 1E9 | (905) 889-8738 |
| Benkiel's Roofing & Sheet 12 Dorian Pl, Thornhill L4J 2M3 | (416) 223-3964 |
| Dennis Mc Rae Roofing 240 York Hill Blvd, Thornhill L4J 2P6 | (905) 731-8679 |