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Gentech Roofing

Updated 2026-09-25 · 19,386 reviewed · 1,323 listed · Scored from 51 Google reviews · How we rank ›

4.9(51) 83 composite score See reviews on Google ✓ Google-verified
Roof Replacement & InstallationRoof RepairFlat & Commercial RoofingRoof Inspection & MaintenanceResidential RoofingSiding ContractorChimney ServicesInsulation ContractorGutter ServiceSheet Metal ContractorWaterproofing ServiceSkylight ContractorRoofing ContractorMetal Roofing24/7 Emergency Roofing

Google-verified51 Google reviewsover 35 years

Gentech Roofing
Location
Mississauga
Services
Roof Replacement & Installation, Roof Repair, Flat & Commercial Roofing
Reviews
51
Ranking
#211 in Roof Replacement & Installation
Best for
homeowners and commercial clients needing responsive service and reliable leak diagnosis

Core details are sourced from this business's Google Business Profile (checked 2026-09-25). Website-sourced details were fetched 2026-09-25.

What do recent reviews say?

Across 15 reviews all five-star, Gentech earns consistent praise for fast, professional work and standout customer service. Customers name staff members-Christine, Roger, Sue, Tina-as responsive and skilled. One reviewer credits Roger with diagnosing a difficult leak that had persisted elsewhere; others highlight efficient completion and clear communication. The office team handles scheduling and updates smoothly, making the whole process feel organized and stress-free.

Praised for
  • responsive and quick staff
  • professional crew
  • skilled problem-solving on difficult leaks
  • excellent admin and scheduling support
professional-crewpunctualskilled-workmanshipresponsive-quotescleans-up-after-job
Best for: homeowners and commercial clients needing responsive service and reliable leak diagnosis

What are they good at?

  • Family-owned 35+ years
  • Named staff respond quickly to calls and emails
  • Diagnose difficult leaks accurately
  • GAF and IKO certified

Worth knowing

  • Roger diagnosed and fixed a difficult persistent leak with vent replacement, caulking, and shingle repair
  • Christine, Sue, and Tina named for responsiveness and office coordination
  • Office team praised for scheduling, administration, and keeping customers informed
  • Crew arrives on time and completes jobs quickly

What reviews say by service

Roof Repair
Roger diagnosed and fixed a difficult persistent leak accurately and efficiently
Flat & Commercial Roofing
Praised for professional, efficient flat roof work on commercial projects
24/7 Emergency Roofing
Emergency leak repair handled professionally and resolved quickly

How it compares

  • Rated 4.9 against a 4.72 average across the 734 roof replacement & installation businesses listed here.
  • Has more Google reviews than 82% of the businesses in this directory.

How we scored this

Ranking Method
Star rating 87
Review volume 75
Review recency 73
Review sentiment 80
Profile completeness 100
Verification 30

Rating breakdown

5
49
4
1
3
1
2
0
1
0
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Last updated 2026-09-25