Best Insulation Contractors in London, ON
20 insulation contractors found in London
Westdel construction ltd
London, ON
Ratings aggregated by AI and may contain inaccuracies.
PetropolisConstruction
London, ON
Ratings aggregated by AI and may contain inaccuracies.
Patches Contracting
London, ON
Ratings aggregated by AI and may contain inaccuracies.
Home James Renovations
London, ON
Ratings aggregated by AI and may contain inaccuracies.
5starbasement.ca
London, ON
Ratings aggregated by AI and may contain inaccuracies.
WE ONE ROOF
London, ON
Ratings aggregated by AI and may contain inaccuracies.
RIA
London, ON
Ratings aggregated by AI and may contain inaccuracies.
L.O. HANDYMAN SERVICES
London, ON
Ratings aggregated by AI and may contain inaccuracies.
Canada Savings Solutions
London, ON
Ratings aggregated by AI and may contain inaccuracies.
Chesney Design & Build
London, ON
Ratings aggregated by AI and may contain inaccuracies.
JMiller Construction
London, ON
Ratings aggregated by AI and may contain inaccuracies.
Sheorattan's Lux Construction Inc
London, ON
Ratings aggregated by AI and may contain inaccuracies.
Kirkwood Renovations
London, ON
Ratings aggregated by AI and may contain inaccuracies.
JA Supply & Services
London, ON
Ratings aggregated by AI and may contain inaccuracies.
Renova Homes Inc
London, ON
Ratings aggregated by AI and may contain inaccuracies.
Osama Alhalabi
London, ON
Ratings aggregated by AI and may contain inaccuracies.
Woodfield Design + Build
London, ON
Ratings aggregated by AI and may contain inaccuracies.
DJB Services
London, ON
Ratings aggregated by AI and may contain inaccuracies.
Innovative Framework Inc.
London, ON
Ratings aggregated by AI and may contain inaccuracies.
Perkins contracting
London, ON
Ratings aggregated by AI and may contain inaccuracies.
How much does insulation cost in London?
Most Canadian homeowners spend $1,800-$4,500 to insulate a typical attic in 2026 - a blown-in top-up to R-60, or about $1.50-$3.00 per square foot installed - with the average job landing near $2,800, before rebates. Batt insulation for walls runs a similar $1.50-$3.00/sq ft, while closed-cell spray foam is the premium option at $3.00-$7.00/sq ft. Whole-home spray-foam packages commonly run $3,000-$12,000.
In London, ON, typical quotes tend to track the Canadian average, so the table below shows these national figures unchanged.
What moves the price: The low end is a blown-in attic top-up or basic batts; the top end is closed-cell spray foam and whole-home packages, plus removal of old insulation first.
| Project | Typical cost in London |
|---|---|
| Blown-in attic insulation (loose-fill fibreglass or cellulose) | $2.00 $1.50 to $3.00 per sq ft |
| Blown-in attic top-up to R-60 - typical home (900-1,500 sq ft attic) | $2,800 $1,800 to $4,500 per project |
| Batt insulation (fibreglass or mineral wool) - walls | $2.25 $1.50 to $3.00 per sq ft |
| Open-cell spray foam (0.5 lb) | $2.50 $1.50 to $3.50 per sq ft |
| Closed-cell spray foam (2.0 lb) - basements, rim joists, cathedral ceilings | $4.50 $3.00 to $7.00 per sq ft |
| Basement wall insulation - full basement (800-1,000 sq ft) | $4,000 $2,500 to $6,500 per project |
| Remove old / contaminated insulation before re-insulating | $1.50 $1.00 to $2.50 per sq ft |
| Whole-home spray foam package (attic + walls + basement) | $7,000 $3,000 to $12,000 per project |
What changes the price of insulation in London
- Area size and rebates: a bigger area costs more up front, but provincial and utility rebates can claw back $1,000 to $7,700 of the net cost in some provinces.
- Insulation type: batt is cheapest, blown-in is mid-priced, and closed-cell spray foam is the most expensive - often 2 to 4 times the cost of batt for the same area.
- R-value target: pushing an attic to R-60 versus a lighter R-40 top-up means more material and more depth, which adds cost.
- Removing old insulation: clean, dry insulation can usually be topped up, but wet, mouldy, rodent-damaged, or old vermiculite material must be removed first, adding roughly $1.00-$2.50 per sq ft (more if hazardous-material handling is needed).
- Attic access and layout: low-pitch roofs, tight crawl spaces, dormers, and multi-level attics slow the crew down and push labour up.
- Air sealing and prep: sealing gaps, adding vent baffles, and boxing out around pot lights and the attic hatch before insulating adds materials and time but is usually worth it.
How insulation prices vary across Canada
Toronto, Vancouver, and other big metros run roughly 10-25% higher than small-town and rural pricing, almost entirely on the labour portion - material costs barely move. One important caveat: attic insulation is heavily rebate-driven in the GTA, so some contractors advertise very low headline prices (as low as about $0.99 per sq ft) that already net out the rebate. Treat those as marketing figures, not the true base install cost - the real pre-rebate range still sits in the $1.50-$3.00 per sq ft band.
These are typical London-area price ranges based on 2026 Canadian market data, not quotes. Your actual cost depends on the size and details of your project. Post your project on Bidmii to get free quotes from the 20 insulation contractors listed in London above.
Frequently Asked Questions about Insulation in London
How much does insulation cost in London?
The cost of insulation services in London, ON varies depending on the scope of work. Post your project on Bidmii to receive free, competitive quotes from local professionals.
How do I find a licensed insulation contractor in London?
Browse our directory of insulation contractors in London above. Look for contractors with the Verified badge, which means their identity has been confirmed. You can also check ratings aggregated from multiple platforms.
How many insulation contractors are in London?
Bidmii currently lists 20 insulation contractors in London, ON. Our directory is growing — create a free listing if you're a contractor.
How much does it cost to insulate an attic in Canada?
For a typical home in 2026, a blown-in top-up to R-60 usually runs about $1,800-$4,500 installed, or roughly $1.50-$3.00 per square foot. Spray foam costs more, and rebates can lower your final out-of-pocket cost.
Is spray foam worth the extra cost over blown-in?
Closed-cell spray foam costs about 2 to 4 times more, but it seals air leaks, blocks moisture, and gives the highest R-value per inch - which makes it the go-to for basements, rim joists, and cathedral ceilings. For an open, walk-around attic floor, blown-in usually gives better value for the money.
Are there rebates for insulation?
Often yes, depending on your province and utility. In Ontario, for example, programs available in 2026 can return up to about $1,250 for a standalone attic job, or more when bundled with an energy assessment. Rebate programs change frequently, so confirm what is currently offered before you book.