Best insulation contractors in Ontario

★★★★★5 (107 reviews)score 91/100

Sigouin holds the top composite score on this list, built on a perfect 5.0 average across 107 reviews. Marc Sigouin personally handles ice dam removal and leak investigations around Ottawa, Gloucester, Rockland, and Orleans, both jobs where poor attic insulation is usually part of the root cause.

• Marc often runs the job site himself
• 2-year warranty on repair work
• Same-day or next-day response on urgent calls
• Detailed photo reports with transparent estimates

Watch out: Reviews focus mainly on roofing and ice dam calls rather than standalone insulation installs.

Google-verified107 Google reviewsfor decades

Services: roof repair, flat roofing, roof replacement installation, metal roofing

★★★★★4.7 (559 reviews)score 90/100

With 559 reviews and a 4.7 average, Professional Roofers has the largest track record on this list, and reviewers specifically call out fairly priced attic insulation added onto roofing jobs. Named staff like Alfredo, Adam, Diego, and Fernando come up repeatedly for clear communication and honest scope discussions.

• Attic insulation priced fairly as an add-on
• Drone survey and photo documentation on jobs
• Thorough cleanup and site management
• Long-term repeat customers, including a decade-long relationship

Watch out: High review volume means slightly more mixed rating variance than the smaller crews on this list.

Google-verified559 Google reviews

Services: roof inspection maintenance, roofing contractor, roof replacement installation, siding contractor

★★★★★4.8 (154 reviews)score 90/100

Integrity Roofers backs certified installs with 25-year material and labour warranties, and staff like Shay, Cory, and Qais are named repeatedly for diagnosing leaks properly rather than just patching symptoms. That kind of root-cause diagnosis matters for insulation and attic ventilation problems as much as for the roof itself.

• 25-year warranties on certified installs
• Transparent quotes with no pressure on small jobs
• Leak diagnosis followed through beyond the original scope
• Long-tenured named technicians

Google-verified154 Google reviewsover 20 years

Services: roof inspection maintenance, roofing contractor, roof replacement installation, siding contractor

★★★★★4.9 (89 reviews)score 89/100

Frank runs Right Choice Roofing and Repair hands-on, showing up on jobs himself and sending photo updates throughout. At 4.9 stars across 89 reviews it's a smaller operation than some on this list, but reviewers describe him recommending second quotes for due diligence rather than pushing extra work.

• Owner Frank personally oversees every job
• Same-day and weekend availability
• Photo updates sent throughout the work
• Honest pricing, including recommending independent second opinions

Watch out: Smaller review base than the top names here, so treat the record as solid but still building.

Google-verified89 Google reviewssince 2007

Services: roof inspection maintenance, roofing contractor, roof replacement installation, siding contractor

★★★★★5 (62 reviews)score 88/100

Every one of Fortress's 62 reviews lands 5 stars, and a recurring theme is Luc's crew cleaning up work that a previous contractor got wrong, useful when insulation problems trace back to a bad earlier install. Nearly 30 years in business and insurance coordination back up the emergency response speed reviewers describe.

• Nearly 30 years of certified roofing and repair work
• Fast turnaround, including emergency availability
• Transparent quotes with no hidden costs
• Track record fixing other contractors' mistakes

Google-verified62 Google reviewsalmost 30 years

Services: roof repair, roof replacement installation, metal roofing, gutter service

★★★★★5 (127 reviews)score 88/100

Airway Roofing answers calls fast, including weekends and holidays, and reviewers at a perfect 5.0 across 127 reviews praise fair pricing that holds firm from quote to invoice. Owner Rob personally evaluates the more complex jobs, which reviewers say shows in the finish quality.

• 24/7 emergency availability, weekends and holidays included
• Competitive pricing that stays firm
• Owner Rob personally evaluates complex jobs
• Same-day or next-day completion on many repairs

Google-verified127 Google reviewssince its establishment

Services: waterproofing service, insulation contractor, roofing contractor, siding contractor

★★★★★4.7 (63 reviews)score 85/100

Sharp Exteriors has been running since 1980 and explicitly lists insulation alongside roofing, siding, windows, and gutters, which suits homeowners who want one crew for a full exterior and attic upgrade. Named contacts like Kyle, Brian, and Bob show up in reviews spanning years and multiple jobs with the same clients.

• 45+ years in business
• Insulation, roofing, siding, windows and gutters under one company
• Named staff maintain relationships across repeat jobs
• Proactive follow-up, fixing details homeowners miss

Google-verified63 Google reviewsSince 1980, over 45 years

Services: roof replacement installation, skylight contractor, emergency 24 7, insulation contractor

★★★★★4.7 (155 reviews)score 84/100

Alpha Roofing completes most metal, shingle, and flat roof jobs in a single day with pricing that comes in competitive to lower than other quotes, according to reviewers. The crew and named project managers (Alan, Echo, Jocelyn, Sandy) get consistent praise, though it's fair to weigh this against the complaints below.

• Most jobs completed in one day
• Competitive pricing versus other quotes
• Dedicated named project managers
• Drone inspection technology used on assessments

Watch out: A minority of reviewers report post-installation leaks and slow follow-up when issues came up afterward.

Google-verified155 Google reviews

Services: siding contractor, flat roofing, metal roofing, sheet metal contractor

★★★★★4.9 (224 reviews)score 84/100

Tiltop runs 224 reviews at 4.9 stars, with crew leads Ali, Hamza, Saad, and Faisal earning steady praise for efficient, tidy work and published starting prices ($299 repair, $999 replacement). The gap shows up after the job: warranty and nail-pop follow-up has been slower than the on-site work suggests.

• Named project managers lead jobs personally
• Operates 7 days a week for emergency calls
• Thorough debris cleanup after every job
• Published, transparent starting prices

Watch out: Some reviewers describe slow or delayed warranty claims after the job is finished.

Google-verified224 Google reviewssince 2011

Services: roof replacement installation, skylight contractor, roof repair, emergency 24 7

★★★★★4.5 (88 reviews)score 83/100

Operating since 1989 with GAF, IKO, BP, and CertainTeed certifications, AAA Roofmasters gets called out for recommending economical repairs over full replacements when that's genuinely what's needed. Named technicians Roy and Jason handle flat roofs, skylights, and eavestrough work with same-day emergency turnaround.

• 24/7 emergency response with same-day turnaround
• Named technicians with repeat customer loyalty
• Honest recommendations, avoiding unnecessary upsells
• Multiple manufacturer certifications since 1989

Watch out: Rating average (4.5) sits a bit below several others on this list, worth weighing against the honest-pricing praise.

Google-verified88 Google reviewssince 1989

Services: roof inspection maintenance, roof replacement installation, siding contractor, flat roofing

★★★★★4.9 (25 reviews)score 83/100

Andre's Roofing is a family operation at 4.9 stars where Desiree and Ron get named for attentiveness, and Andre documents jobs with photos while walking clients through options without pressure. The 25-review base is smaller than most on this list, so treat the strong average as an early but consistent signal.

• Family-run with strong, personal communication
• Fair pricing without upselling
• Thorough hand cleaning of gutters and job sites
• Andre documents work with photos throughout

Watch out: Review count is modest (25), so the track record is shorter than the larger operations above it.

Google-verified25 Google reviews

Services: waterproofing service, gutter service, roof repair, roof inspection maintenance

★★★★★4.9 (31 reviews)score 82/100

Pierre and his crew at Brunet Exteriors handle roofing, siding, gutters, and insulation across Burlington, arriving on schedule and rarely drifting from the quoted price. Reviewers single out the crew (Carter, Dan, Taylor, Mike, Craig) for solving jobs other contractors called unachievable.

• Owner Pierre personally inspects before and after
• Insulation included alongside roofing and siding
• Same-day or rapid completion on many jobs
• Creative problem-solving on difficult roofs

Watch out: One reviewer reported water damage years later from flashing on a subcontracted roof job.

Google-verified31 Google reviews

Services: flat roofing, skylight contractor, insulation contractor, roof repair

★★★★★4.7 (31 reviews)score 82/100

Royal York Roofing takes on slate, cedar, and flat roofing work that fewer contractors touch, with Pavel, Vitaly, and Eleanor named for quotes that match the final bill and daily site cleanup. Reviewers mention them catching and fixing problems other contractors left behind, relevant when attic insulation gets damaged during a botched prior job.

• Rare expertise in slate and cedar roofing
• Transparent pricing with no surprise charges
• Multi-trade coordination across roofing, siding and gutters
• Responsive office staff coordinating multi-phase jobs

Google-verified31 Google reviewsover 20 years of experience

Services: roofing contractor, roof replacement installation, siding contractor, flat roofing

★★★★★4.9 (36 reviews)score 81/100

Justin runs Stevensons as a one-person operation covering roofing, siding, chimneys, insulation, and metal work, and reviewers describe him finding hidden damage other contractors miss over a decade-long track record. That single-technician model means consistent accountability but also a capacity limit.

• Decade-long reputation for finding hidden damage
• One technician for consistency and accountability
• Fast photo and video quotes
• Fixes root causes rather than surface symptoms

Watch out: Being a single-technician operation, capacity for larger or simultaneous jobs may be limited.

Google-verified36 Google reviews

Services: chimney services, siding contractor, skylight contractor, waterproofing service

★★★★★5 (8 reviews)score 78/100

Calthorpe is one of the few businesses on this list built specifically around insulation and roofing, and every review to date is 5 stars. Owner Joe handles diagnosis personally and reviewers describe precise, well-explained work that stays on schedule without overselling.

• Owner Joe handles diagnosis and work personally
• No unnecessary upselling on repairs

Watch out: Only 8 reviews so far, so the perfect rating is a promising but still small sample.

Google-verified8 Google reviews

Services: insulation contractor, roofing contractor, siding contractor, skylight contractor