gt3hho in Whitchurch-Stouffville 1 review Markham, ON Joined 2020/07/04 10/10 Roof done Roofing review in Markham 7 months ago They did a very professional job. Recommend good products and choices. Will refer to my friends. Job Price Was this review helpful? Company ResponseThanks for your great review, we appreciate and always be here when you need us again.^^ Yennice.C