Roofing Services in Thornhill
Family-owned Ontario roofers serving Thornhill since 2012. Asphalt, metal, flat and emergency roofing.
Local roofers serving Thornhill since 2012.
Thornhill's established neighbourhoods contain some of the GTA's most valuable homes, and their roofs deserve equally elevated craftsmanship: designer laminate shingles, copper flashing details and premium underlayment.
Weather challenges: Mature trees plus older homes mean flashing, chimney seals and ventilation are the most common failure points. Our Thornhill installations use premium ice-and-water shield, high-wind-rated shingles and factory-matched flashings to stand up to every season.
We handle residential roofing (asphalt, metal, cedar and designer synthetic systems) plus full commercial roofing (TPO, EPDM, PVC and modified bitumen) for buildings across Thornhill. Our 24/7 emergency roofing team responds to storm damage and active leaks any hour, and our office manages insurance claim assistance from photos to adjuster meetings to final invoicing.
Neighbourhoods we serve in Thornhill
Bayview Glen · Royal Orchard · Uplands · Old Thornhill · German Mills
Every roofing service, delivered locally.
Commercial Roofing
Low-slope and flat commercial systems for every property.
Learn moreMetal Roofing
Premium standing seam and metal shingle systems.
Learn moreFlat Roofing
Modern flat roof installations engineered for Canadian winters.
Learn moreAsphalt Shingles
Architectural shingles from CertainTeed, IKO and BP.
Learn morePVC Roofing
Durable PVC single-ply membranes for commercial roofs.
Learn moreRoof Repair
Precision repairs by certified roofers, done right the first time.
Learn moreRoof Replacement
Full tear-off and premium replacement with warranty.
Learn moreRoof Inspection
35-point inspection with detailed photo report.
Learn moreEmergency Roofing
24/7 emergency response, storm and leak stabilization.
Learn moreSkylights
VELUX skylights, professionally installed and sealed.
Learn moreSoffit
Ventilated aluminum soffit installation and repair.
Learn moreEavestrough
Seamless eavestroughs installed on-site.
Learn moreLocal craft. Warranties that hold up.
Family-Owned Since 2012
Serving Thornhill homeowners with the same ownership and pride.
Licensed & Insured
$2M liability, WSIB registered.
Free Estimates
No-obligation on-site inspection.
24/7 Emergency Roofing
Storm and leak response any hour.
Premium Materials
CertainTeed, IKO, Owens Corning, VELUX.
Industry-Leading Warranty
Up to 50 yrs + 10 yrs workmanship.
Fast Response Times
Reply within 15 minutes.
Local Thornhill Experts
We know the climate, codes and homes.
A few local roofs we've built.
Real reviews from Ontario homeowners.
See what clients say about Keen Roofing — the same crews that serve Thornhill.
Roofing questions from Thornhill.
Answers to the most common local questions.
Call (437) 236-3045Roof replacement in Thornhill typically starts around $9,500 for a standard asphalt shingle installation on an average-sized home. Metal, cedar and complex multi-pitch roofs are quoted individually. Every Keen Roofing estimate is itemized so you know exactly what you're paying for.
Get a free Thornhill roof quote.
Reply within 15 minutes during business hours.
- (437) 236-3045
- Serving Thornhill, York Region
We also serve nearby cities.
Certified installer for premium manufacturers
Need Roofing Services in Thornhill? Book your FREE inspection today.
Free on-site inspection · Written itemized quote · 15-minute callback.
Need Roof Repair? Book your FREE inspection today.
On-site inspection, itemized quote and straight advice — free, with no obligation.