| Business | Phone |
| Kavanagh Roofing 6145 16th Ave, Markham L3P 3K8 | (905) 472-9011 |
| Kellcor Inc 9842 Woodbine Ave, Markham L6C 1H8 | (905) 887-9280 |
| Nordic Roofing & Eavestrough 6 Mccarty Cres, Markham L3P 4R6 | (905) 294-4016 |
| Barker Roofing & Siding 6074 19th Ave, Markham L3P 3J3 | (905) 642-7000 |
| Roofscapers 400 Esna Park Dr, Markham L3R 3K2 | (905) 415-7663 |
| Chouinard Bros Roofing 120 Gibson Dr, Markham L3R 2Z3 | (905) 479-8300 |
| Construx Group Canada Inc 80 Esna Park Dr, Markham L3R 2R6 | (905) 946-9800 |
| Edmunds Roofing 44 Sir Gawaine Pl, Markham L3P 3A2 | (905) 472-0276 |
| Flat Roofing 168 Old Kennedy Rd, Markham L3R 0L5 | (905) 305-0833 |
| Nu Edge Roofing Inc. 50 Ladyfern Dr Markham Ontario, Markham L3S 4C3 | (905) 472-1748 |