Closed Cell Spray Foam Canada Toronto 2026: Complete Guide

Closed cell spray foam insulation in Canada costs between $2.50 and $5.00 per square foot CAD installed, making it one of the most cost-effective and high-performance insulation upgrades available to GTA homeowners who want to dramatically reduce energy bills, eliminate moisture intrusion, and add real structural value to their property — all in a single application.

The Short Answer

If you are a homeowner in Toronto, Vaughan, Mississauga, or anywhere across the Greater Toronto Area asking whether closed cell spray foam is worth the investment, the answer is an unequivocal yes. With energy prices continuing to rise across Ontario and federal and provincial rebate programs carrying into 2026, there has never been a smarter time to upgrade your insulation with professional-grade closed cell spray foam.

Closed cell spray foam (also called 2-pound foam due to its density) expands to approximately 1 inch of thickness per pass and delivers an industry-leading R-value of R-6 to R-7 per inch. Unlike fibreglass batts or blown-in cellulose, closed cell spray foam creates an air-tight, moisture-resistant seal that addresses three problems simultaneously: thermal resistance, air infiltration, and vapour control. For Canadian climates — where winters are brutal and summers are humid — this triple-action performance is simply unmatched.

At Spray Foam Kings, we have installed closed cell spray foam in thousands of GTA homes and commercial properties over 15 years. We know exactly what it takes to pass Ontario Building Code inspections, qualify for rebates, and deliver results that last for decades. This guide covers everything you need to know before making your decision.

Explore our full service offering: closed cell spray foam services, open cell spray foam services, and attic insulation services.

Cost by Type

Understanding the difference in cost between open cell and closed cell spray foam helps you choose the right product for your specific application. Both products are premium insulation solutions, but they perform differently and are priced accordingly. The table below reflects current 2025 market rates for the GTA region, with pricing expected to remain stable into 2026 barring significant material supply disruptions.

Insulation Type	Cost Per Square Foot (CAD)	R-Value Per Inch	Best Applications
Open Cell Spray Foam	$1.50 – $3.50 / sq ft	R-3.5 to R-4	Interior walls, attics, soundproofing
Closed Cell Spray Foam	$2.50 – $5.00 / sq ft	R-6 to R-7	Basements, crawlspaces, exterior walls, rooflines

For most GTA homes, a basement or crawlspace closed cell project covering 800 to 1,200 square feet will run between $2,000 and $6,000 CAD depending on thickness and complexity. Attic insulation upgrades with closed cell foam in a standard Toronto semi-detached home typically range from $3,500 to $8,000 CAD. Commercial and multi-unit residential projects are priced on a per-project basis after a site assessment. Contact us at 647-641-6881 for a free, no-obligation estimate.

Comparison Table

Feature	Closed Cell Spray Foam	Open Cell Spray Foam	Fibreglass Batt	Blown-In Cellulose
R-Value Per Inch	R-6 to R-7	R-3.5 to R-4	R-3.1 to R-4.3	R-3.2 to R-3.8
Air Sealing	Excellent	Good	Poor	Moderate
Vapour Barrier	Yes (at 2+ inches)	No	No	No
Moisture Resistance	Excellent	Low	Low	Moderate
Structural Rigidity	Yes	No	No	No
Lifespan	80–100 years	80–100 years	15–20 years	20–30 years
Cost (CAD/sq ft installed)	$2.50 – $5.00	$1.50 – $3.50	$0.50 – $1.50	$0.80 – $2.00
Qualifies for Ontario Rebates	Yes	Yes	Sometimes	Sometimes

Ontario Rebates 2026

One of the most compelling reasons GTA homeowners are investing in closed cell spray foam right now is the availability of substantial government rebates. As we head into 2026, both federal and provincial programs remain active and accessible for eligible homeowners who complete a pre- and post-retrofit energy assessment through a Natural Resources Canada registered energy advisor.

Canada Greener Homes Grant: Eligible homeowners can receive up to $10,600 CAD in grants for qualifying home energy upgrades, including attic insulation, basement insulation, and above-grade wall insulation. Spray foam qualifies when installed to the depths required under the program guidelines. Applications for 2026 funding are expected to continue on a first-come, first-served basis, so early action is strongly advised.

IESO Home Efficiency Rebate Plus (HER+): The Independent Electricity System Operator administers the HER+ program on behalf of the Ontario government. This program offers rebates of up to $5,000 CAD on insulation upgrades for natural gas customers served by Enbridge Gas. Closed cell spray foam installed in attics, basements, and crawlspaces may qualify when it meets minimum R-value improvements outlined under the program criteria.

Canada Greener Homes Loan: In addition to grants, interest-free loans of up to $40,000 CAD with a 10-year repayment term are available to homeowners who want to complete deeper retrofits. For a homeowner investing $15,000 to $20,000 in whole-home insulation including closed cell spray foam, this loan effectively removes the upfront cost barrier entirely.

Spray Foam Kings works directly with homeowners to ensure all installations are documented and meet the technical specifications required for rebate eligibility. We can connect you with a registered energy advisor to complete your pre-retrofit assessment before we begin work. Given the projected demand for rebate dollars in 2026, we recommend booking your assessment as early as possible.

Service Areas

Spray Foam Kings proudly serves residential and commercial clients across the entire Greater Toronto Area. Our fully equipped crews are available for same-week bookings in most service areas, and we offer free on-site quotes with no commitment required. Our primary service areas include:

• Toronto — Downtown core, Midtown, East End, West End, and all surrounding neighbourhoods
• Scarborough — Including Agincourt, Malvern, Rouge Hill, Birchcliff, and Wexford
• North York — Including Willowdale, Don Mills, Lawrence Park, and Downsview
• Etobicoke — Including Rexdale, Mimico, Long Branch, and Humber Valley
• Vaughan — Including Woodbridge, Maple, Concord, and Kleinburg
• Mississauga — Including Port Credit, Streetsville, Meadowvale, and Erin Mills
• Markham — Including Unionville, Cornell, Milliken, and Buttonville
• Brampton — Including Bramalea, Heart Lake, Springdale, and Sandalwood

Not sure if we serve your area? Call us at 647-641-6881 — we also serve many communities surrounding the GTA including Burlington, Oakville, Newmarket, Richmond Hill, and Ajax.

“We had Spray Foam Kings insulate our entire basement and crawlspace in Leslieville in January 2026. The crew was professional, on time, and cleaned up perfectly. Our gas bill dropped by over $180 CAD per month compared to last winter. The total job cost was $4,800 CAD and we received $2,600 back through the Greener Homes Grant. Honestly one of the best home improvement decisions we have ever made. The house feels completely different — no cold floors, no drafts. Would recommend Spray Foam Kings to every Toronto homeowner.”

— David M., Leslieville, Toronto, 2026

Ontario Building Code

Installing insulation in Ontario is not simply a matter of picking the product you prefer and stapling it in place. The Ontario Building Code (OBC) sets specific minimum requirements for thermal performance, vapour control, and air barriers depending on the climate zone, the location of the insulation within the building envelope, and the type of construction.

SB-12 Compliance: Supplementary Standard SB-12 governs energy efficiency in residential buildings in Ontario. For new construction and significant renovations, SB-12 sets prescriptive minimum R-values for attics (typically R-50 to R-60 in most GTA climate zones), above-grade walls (R-22 to R-31 effective), and below-grade assemblies. Closed cell spray foam is an excellent tool for achieving these minimums because of its high R-value per inch, which is especially useful in retrofits where cavity depth is limited.

Vapour Barrier Requirements: The OBC requires a Class II vapour retarder on the warm-in-winter side of insulation in most assemblies. At 2 inches of thickness or greater, closed cell spray foam achieves a vapour permeance of less than 1 perm, meeting the Class II vapour retarder requirement without the need for a separate polyethylene sheet. This simplifies installation significantly, reduces labour time, and eliminates the risk of improper poly installation — a common source of moisture problems in older Toronto homes.

Air Barrier Requirements: Ontario’s building code also mandates a continuous air barrier throughout the building envelope. Closed cell spray foam, when applied as a continuous layer, satisfies the air barrier requirement under most assembly types. Our installers are trained to identify and address penetrations, transitions, and thermal bridging points that must be addressed to achieve a code-compliant air-tight assembly.

Spray Foam Kings installs all products in full compliance with the Ontario Building Code, the National Building Code of Canada, and CCMC-evaluated product specifications. We provide documentation to homeowners and general contractors upon project completion.

Why Choose Spray Foam Kings

There are dozens of insulation contractors operating in the GTA, but very few offer the combination of certification, insurance, experience, and customer service that Spray Foam Kings brings to every project. Here is what sets us apart:

• SPFA Certified: We are certified members of the Spray Polyurethane Foam Alliance, the industry’s leading professional certification body. SPFA certification requires demonstrated knowledge of product chemistry, application techniques, safety procedures, and building science principles.
• $5 Million Liability Insurance: Every project we undertake is covered by $5,000,000 CAD in commercial general liability insurance. You can hire us with complete confidence knowing that your home and investment are protected.
• WSIB Covered: All Spray Foam Kings employees are covered under the Workplace Safety and Insurance Board. You will never be exposed to liability for injuries sustained on your property during our work.
• 15+ Years Serving the GTA: Since our founding, Spray Foam Kings has completed thousands of residential and commercial spray foam projects across Toronto, the 905, and beyond. We have the experience to handle simple basement jobs and complex commercial roofing applications with equal professionalism.
• 4.9-Star Rating from 287 Reviews: Our reputation is built on the quality of our work and the experience we deliver to every client. Read our reviews on Google and you will see consistent praise for our cleanliness, communication, technical expertise, and results.
• Free Quotes with Same-Week Availability: We offer free, detailed written quotes with no pressure and no surprises. Most GTA projects can be scheduled within 5 to 7 business days of quote acceptance.

Learn more about our closed cell spray foam services, open cell spray foam services, and attic insulation services.

Get Your Free Quote Today

Ready to find out exactly how much your closed cell spray foam project will cost? Contact the GTA’s most trusted spray foam insulation team today. We will schedule a free on-site assessment, walk you through all available product options, explain which rebate programs you qualify for, and provide a detailed written quote with no obligation to proceed.

Do not wait — 2026 rebate programs are filling up fast, and the sooner you insulate, the sooner you start saving on your energy bills every single month.

Call us now: 647-641-6881

Website: www.sprayfoamkings.ca

Frequently Asked Questions

How much does closed cell spray foam cost in Canada?

Closed cell spray foam insulation in Canada typically costs between $2.50 and $5.00 per square foot CAD, fully installed by a professional contractor. A standard basement project covering 1,000 square feet at 2 inches of thickness runs approximately $3,000 to $5,500 CAD. An attic insulation project using closed cell foam can range from $4,000 to $9,000 CAD depending on the pitch, accessibility, and required R-value depth. These prices reflect current GTA market conditions and are expected to remain relatively stable into 2026.

What R-value does closed cell spray foam provide?

Closed cell spray foam delivers an R-value of R-6 to R-7 per inch. A 2-inch application achieves approximately R-12 to R-14, while a 3-inch application reaches R-18 to R-21. For Ontario basement walls, we typically recommend 2 to 3 inches for year-round performance. For attics and roof decks, 5 to 6 inches may be needed to achieve SB-12 compliance, though closed cell foam is often combined with other insulation types to reach target R-values cost-effectively.

Is closed cell spray foam eligible for rebates in Ontario in 2026?

Yes. In 2026, Ontario homeowners remain eligible for the Canada Greener Homes Grant of up to $10,600 CAD and the IESO Home Efficiency Rebate Plus program for qualifying insulation upgrades. Closed cell spray foam qualifies in most application areas including attics, basement walls, crawlspaces, and above-grade walls when installed to the minimum depths specified under each program. A pre-retrofit energy assessment by a Natural Resources Canada registered energy advisor is required before installation. Spray Foam Kings can help coordinate this process.

What is the difference between open cell and closed cell spray foam?

Open cell spray foam costs $1.50 to $3.50 per square foot CAD and provides R-3.5 to R-4 per inch. It is soft, vapour-permeable, and excellent for interior wall cavities and attic floors where vapour transmission is acceptable. Closed cell spray foam costs $2.50 to $5.00 per square foot CAD, provides R-6 to R-7 per inch, acts as a vapour retarder at 2 inches or more, resists moisture, and adds structural rigidity to the assembly. For Canadian climates, closed cell is the preferred choice for below-grade applications, exterior wall assemblies, and any area with potential moisture exposure.

Does closed cell spray foam act as a vapour barrier in Ontario?

Yes. At 2 inches of thickness or greater, closed cell spray foam achieves a vapour permeance below 1 perm, meeting the Ontario Building Code’s Class II vapour retarder requirement. This eliminates the need for a separate polyethylene vapour barrier in most assemblies, reducing labour time and removing a common installation error that leads to trapped moisture and mould. Our installers are trained to assess each specific assembly and confirm vapour control compliance before completing any project.

How long does closed cell spray foam last?

Closed cell spray foam has an expected service life of 80 to 100 years when properly installed and protected from UV exposure. Unlike fibreglass batts that sag and compress over time or blown-in cellulose that can settle and shift, closed cell spray foam maintains its form, adhesion, and thermal performance for the lifetime of the building. It does not absorb water, does not support mould growth, and does not off-gas after the initial cure period of approximately 24 hours.

How long does the installation process take?

Most residential closed cell spray foam projects in the GTA are completed in 1 to 2 days. A basement insulation project typically takes 4 to 6 hours. Attic applications may take a full day. After spraying, the foam cures within 30 to 60 minutes but we recommend waiting 24 hours before occupying the sprayed space. Our crew handles all prep work including masking and protection of adjacent surfaces, and we perform a thorough cleanup before leaving the site.

Does Spray Foam Kings serve areas outside Toronto?

Yes. Spray Foam Kings serves the entire Greater Toronto Area including Scarborough, North York, Etobicoke, Vaughan, Mississauga, Markham, and Brampton, as well as surrounding communities such as Richmond Hill, Newmarket, Aurora, Oakville, Burlington, Pickering, Ajax, and Whitby. If you are unsure whether we service your area, call us at 647-641-6881 and we will confirm availability. For most GTA addresses, we can have a crew on site within 5 to 7 business days of booking.