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24 companies listed ยท 19 in Markham ยท 5 open 24/7 ยท 20 open weekends ยท 17 rated 4.5+
Data verified October 21, 2026
Listed for homeowners in and around Markham, ON, these 24 companies work on exterior walls. Details about materials, colour ranges and insulation options are drawn from each company's own site, and the review quotes underneath are public reviews.
19 of the 24 companies we list are based in Markham; the other 5 serve Markham from towns including Richmond Hill (14 km), Scarborough (15 km) and Toronto (17 km). 22 of the companies on this page have a rating, from 3.7 to 5.0 across 1,621 reviews; 8 have 50 or more reviews and 17 are rated 4.5 or higher. When customers rate these companies on specific qualities, they most often praise professionalism (90%), quality (86%) and responsiveness (81%). 5 are open around the clock; 20 are open on Saturdays and 18 on Sundays. The services the companies on this page list most often on their websites are skylights (3), eavestrough installation (2), eavestrough replacement (2), gutters (2) and leaf guard (2). 3 show a licence on their websites and 1 lists staff certifications (GAF). Domain records put 8 websites of the companies on this page at ten or more years old; the oldest dates from 2003. 5 offer emergency call-outs; 2 offer financing or payment plans; 21 give free estimates; 3 are family- or locally-owned and 1 lists coupons or special offers. We count these figures across the companies on this page; distances are straight-line, and hours and prices change, so confirm the details with the company before you book.
Websites are listed for 22 of the 24 companies on this page. Open them and look for finished houses nearby, ideally after a winter or two rather than on handover day. Close-up photographs around windows and at corners show the standard of the trim work, which is where a rushed job gives itself away first.
