Thornhill Roofing Contractors for Roof Repair, Replacement & Installation
IKO Premier Craftsman Certified, licensed and insured, with trusted residential and commercial roofing services across Thornhill, Vaughan, Markham, and York Region.
IKO’s premier craftsmans certified, BBB-accredited, with thousands of satisfied residential and commercial customers.
- IKO Premier Craftsman Certified
- 25,000+ Roofs Installed
- Licensed and insured
- With trusted residential and commercial roofing services across Thornhill, Vaughan, Markham, and York Region.
Request Your Free Thornhill Roofing Estimate
Fast response in Thornhill. No obligation. Clear inspections and practical roofing recommendations.
Roofing Contractors in Thornhill: Quick Answer
Professional Roofers provides residential and commercial roofing services through experienced roofing contractors in Thornhill, including roof repair, roof replacement, shingle roofing, shingle roof replacement, flat roofing, metal roofing, emergency roof repair, roof inspections, skylights, soffit and fascia, eavestroughs, insulation, attic ventilation, and roof maintenance support.
Thornhill sits across both Vaughan and Markham, with Yonge Street running through the community. That means homes and buildings can vary widely in age, roof design, drainage layout, and attic conditions.
Roofing Solutions for Thornhill Homes and Businesses
Roof repair, replacement, inspections, and maintenance for Thornhill homeowners experiencing leaks, aging shingles, ice buildup, and attic moisture.
Commercial roofing for offices, plazas, mixed-use properties, low-slope buildings, and business locations that need reliable roof performance.
Targeted roof repair and maintenance for leaks, flashing issues, drainage problems, loose shingles, and early signs of roof failure.
What Our Thornhill Roof Inspection Covers
Thornhill properties often need more than a surface check because roof age, slope, ventilation, and drainage can vary from street to street.
- shingle, flat roof, metal roof, and flashing issues
- active leaks or hidden moisture entry points
- eavestrough and downspout drainage
- attic ventilation and condensation risk
- insulation gaps and heat-loss concerns
- whether repair, maintenance, or replacement makes sense
Common Roofing Problems in Thornhill Homes and Buildings
You may need a roofing contractor in Thornhill if you’ve noticed:
- roof leaks after rain or snowmelt
- shingles curling, cracking, or lifting
- water stains near ceilings, skylights, or attic areas
- eavestrough overflow during storms
- ice buildup along the roof edges
- poor attic airflow or upstairs heat buildup
- flat roof ponding on low-slope sections
- flashing damage around chimneys, vents, or rooflines
Small roofing problems can quickly turn into insulation damage, mould risk, ceiling repairs, and higher replacement costs.
Roof Replacement Costs in Thornhill
Roof replacement costs in Thornhill depend on roof size, slope, material choice, layers removed, decking condition, and access.
For Ontario homes, asphalt shingle roof replacement costs and financing typically range from about $6,000–$16,400 depending on size and complexity. We offer flexible $6,000–$11,800 options to help you comfortably manage these costs.
Another 2026 cost guide places asphalt shingles around $7 per sq. ft., while flat roofing systems such as TPO and EPDM can start around $13+ per sq. ft.
Thornhill Roof Repairs, Installations & Full-Service Solutions
Professional Roofing Contractors Serving Thornhill & Surrounding Areas
Thornhill is a unique community because it stretches across both Vaughan and Markham, with Yonge Street running right through the middle.
That creates a wide mix of roofing needs. Older homes near Old Thornhill and Yonge Street may need shingle replacement, flashing repairs, improved attic ventilation, or drainage upgrades. Properties closer to Bayview, Doncaster, and surrounding Markham-side areas may have different rooflines, low-slope sections, skylights, or eavestrough issues.
Professional Roofers inspects each roof based on its age, structure, ventilation, drainage, and exposure so the recommendation fits the property.
Why Thornhill Clients Choose Professional Roofers
Residential and commercial roofing experience
We handle repairs, replacements, inspections, maintenance, and full roofing systems for homes and businesses.
Clear recommendations
We explain what needs attention now, what can wait, and your best next step.
Built for Ontario weather
Thornhill roofs withstand snow, rain, wind, ice, and freeze-thaw cycles.
Separate roof-system services
We provide roofing, insulation, ventilation, soffit and fascia, skylights, eavestroughs, and related services separately.
Clean, dependable work
Our team focuses on clear communication, clean artistry, and long-term roofing performance.
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Need a Clear Answer About Your Thornhill Roof?
Not sure if your roof needs repair, maintenance, or replacement?
Professional Roofers can inspect your roof, explain what’s happening, and give you a practical next step without pressure.
Certified & Trusted Roofing Partners
Partnering with top roofing manufacturers and certified organizations, we ensure every roof we install delivers unmatched quality, durability, and peace of mind for Toronto homeowners and businesses.
Roofing Services Across Thornhill Neighborhoods
We provide roofing services across Thornhill and nearby areas, including:
- Old Thornhill
- Thornhill Woods
- Grandview
- Royal Orchard
- Uplands
- Bayview Glen
- German Mills
- Yonge Street corridor
We also serve nearby communities in Vaughan, Markham, and York Region with residential and commercial roofing support.
Trusted by Homeowners & Businesses Across Thornhill
With over 500 verified Google reviews, multiple HomeStars nominations, 800+ customer reviews, and Top Choice Awards, Professional Roofers is one of Thornhill’s most trusted roofing contractors. Our certified team delivers quality, reliability, and peace of mind on every project, protecting homes and businesses across Thornhill and the GTA.
Thornhill Roofing FAQs
Do you provide both residential and commercial roofing in Thornhill?
Yes. We provide residential and commercial roofing services in Thornhill, including repairs, replacements, inspections, flat roofing, shingle roofing, metal roofing, and emergency services.
Can you repair a leaking roof in Thornhill?
Yes. We repair roof leaks caused by damaged shingles, flashing issues, drainage problems, flat roof failures, and other roofing issues.
Do you offer shingle roof replacement in Thornhill?
Yes. We provide shingle roof replacement for Thornhill homes with ageing, damaged, missing, curling, or failing shingles.
Do you serve both the Vaughan and Markham sides of Thornhill?
Yes. We serve Thornhill properties on both the Vaughan and Markham sides, as well as nearby York Region communities.
Do you offer emergency roof repair in Thornhill?
Yes. We provide emergency roof repair for sudden leaks, storm damage, or roof problems that leave the property exposed.
Do you inspect attic ventilation and insulation?
Yes. We check ventilation and insulation for concerns that may affect moisture, comfort, ice dams, or roof performance.
How much does roof replacement cost in Thornhill?
Roof replacement costs depend on roof size, slope, materials, tear-off requirements, and roof condition. Ontario asphalt shingle replacements commonly range from $6,000 to $16,400 for many mid-sized homes.
- Licensed & Insured
- Emergency Repairs Available
- Commercial Project Specialists
Get a Free Roofing Estimate in Thornhill
Need help from trusted roofing contractors in Thornhill for roof repair, roof replacement, flat roofing, shingle roof replacement, or a roofing inspection?
Professional Roofers provides residential and commercial roofing services with clear recommendations and free estimates.
No obligation. Fast response. Practical next steps for your roof.