Metro Roofing
“Tony was recommended to me and when I contacted him, not only was the customer service good, he was able to come out the next day!”
Best Siding Contractors in Ajax, ON
15 companies listed · 6 in Ajax · 2 open 24/7 · 10 open weekends · all 15 rated 4.5+
Data verified October 18, 2026
Norris Roofing
“They were able to find the area, fixed that part up with shingles that were almost identical to mine and they were able to provide their services in a timely manner.”
Durham Region Roofing Ltd.
“Michael and his team did a great job at replacing our roof.”
Eastern Eavestroughing
“Excellent workmanship and great customer service at a fair price - can't ask for anything more.”
Prgc
“We can't say enough about how great the service was from Ryan & his team at Priceless Roofing & General Contracting!”
Unic Sheet Metal & Eavestroughing
“Used them for multiple eavestroughing jobs, always a pleasure dealing with the guys can Calvin!”
Listed for homeowners in and around Ajax, ON, these 15 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.
Area overview: Ajax, ON
6 of the 15 companies we list are based in Ajax; the other 9 serve Ajax from Oshawa (16 km), Whitby (8 km) and Markham (18 km). The companies on this page are rated from 4.5 to 5.0 across 1,245 reviews; 10 have 50 or more reviews. When customers rate these companies on specific qualities, they most often praise professionalism (90%), quality (85%) and responsiveness (85%). The topics that come up most in reviews of the companies on this page are "estimates", "price" and "crew". 2 are open around the clock and 10 are open on weekends. Domain records put 7 websites of the companies on this page at ten or more years old; the oldest dates from 2001. 2 offer emergency call-outs; 1 offers financing or payment plans; 13 give free estimates; 6 are family- or locally-owned and 1 lists coupons or special offers. We have a website on file for all 15 of the companies on this page; 13 publish a contact page and 10 list a public email. 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.
How many of these companies publish a website?
Websites are listed for all 15 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.
Wilson's Roofing
“They diagnosed the cause of a leaking skylight, gave me a fair quote and had the work complete on time and on budget.”
Logik Roofing & Insulation Oshawa
“Mark, Gus & Corey did an awesome job adding more attic insulation in my home and l want the owner to know he has a great team and l highly recommend Logik roofing from Wayne in Hamilton.”
Over the Top
“I would highly recommend them if looking to have your roof replaced.”
Colin's Roofing & Eavestrough
“Colin was a pleasure to work with he was friendly, knowledgeable, professional and very polite.”
Ck Roofing Solutions
“If you you're roof needs work - CK Roofing is definitely worthy.”
Dryhome Roofing
“Jordan from Dryhome identified the issue and fixed it by redirecting excess water from the flat roof and sealing all gaps.”
C.D. Roofing & Construction Ltd.
“We were immensely impressed with their professionalism and dedication to get the problem fixed.”
Mega City Roofing Inc
“They were prompt and professional while being reasonably priced and the workmanship was excellent.”
RMS Siding and Eavestrough Inc
“He only quoted for the work I really needed and he didn't try to upsell me into a new eavestrough system or sell me leaf gutter guards.”
Why these companies made our list
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