Insulation Contractor in London, ON
Trusted Insulation Services for London, Ontario Homes and Businesses
London Insulation Company helps homeowners and commercial property owners improve comfort and reduce heat loss with attic insulation, blown-in insulation, spray foam, air sealing, insulation removal, basement work, crawl-space upgrades, and other building-envelope improvements across London and Middlesex County.
- Attic, basement, wall, and crawl-space insulation
- Air sealing, thermal imaging, and moisture-focused diagnostics
- Residential and commercial projects across Southwestern Ontario
Insulation Services Built Around The Building Envelope
Attic Insulation
Fix cold ceilings, drafts, and attic moisture with insulation tailored to London homes.
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Blown-In Insulation
Blown-in insulation helps stop drafts, fill voids, and stabilize cold rooms fast.
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Spray Foam Insulation
Reduce drafts, cold spots, and moisture problems with spray foam insulation.
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Garage Insulation
Reduce garage drafts, colder rooms, and heat loss with targeted garage insulation.
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Basement Insulation
Basement insulation that cuts drafts, limits moisture risk, and steadies lower-level comfort.
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Commercial Insulation
Commercial insulation that cuts heat loss, air leakage, and moisture risks across London, ON.
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Crawl Space Insulation
Reduce cold floors, drafts, and moisture issues with crawl space insulation.
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Insulation Removal
Remove damaged insulation, reduce hidden moisture risks, and prepare your home for a better upgrade.
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About London Insulation Company
Practical Insulation Work For Southwestern Ontario Buildings
London Insulation Company provides residential and commercial insulation services throughout London, Ontario and nearby Middlesex County communities. We focus on the parts of the building envelope that most often drive comfort problems, including the attic ceiling plane, wall cavities, rim joists, sill plates, basements, crawl spaces, garages, and other exposed assemblies.
Many local homes lose comfort because of conductive heat transfer through under-insulated areas, air leakage around penetrations, thermal bridging at framing, and moisture movement that can lead to condensation or attic frost. We look at the full assembly, not just the visible insulation, so the recommendation fits how the building actually performs.
Depending on the project, that may include loose-fill cellulose, blown fibreglass, fibreglass batts, mineral wool, open-cell or closed-cell spray polyurethane foam, EPS, or XPS. We also address details like attic hatches, top plates, soffit baffles, roof sheathing, moisture meters, blower-door testing, and ACH50-informed air-sealing work when appropriate for the job.
- We focus on performance, not just thickness. Insulation depth, air barriers, vapour control, and moisture conditions all matter in a cold climate like Southwestern Ontario.
- We explain what is causing the problem. Cold rooms, drafts, uneven temperatures, attic frost, and high heating demand often trace back to heat loss, air leakage, or both.
- We keep the work practical and specific. Each building gets a plan based on its structure, materials, and current condition.
Our Service Standard
How We Work
The site is structured so visitors can quickly find the services, rebate information, service areas, and contact details most relevant to an insulation project.
Envelope-First Thinking
We look at heat flow, air leakage, and moisture pathways so the insulation plan fits the whole assembly.
Clear Material Choices
We explain where cellulose, fibreglass, mineral wool, or spray foam makes sense and where another approach is better.
Detail-Oriented Installation
We pay attention to framing gaps, penetrations, soffit ventilation, rim joists, and other places that affect performance.
Service Areas
Proudly Serving Your Main Community And Surrounding Areas
London Insulation Company serves London, Ontario and surrounding Middlesex County communities with insulation, air sealing, moisture-aware building-envelope work, and project support for homes and commercial properties across Southwestern Ontario.
FAQ
Common Questions About Insulation In London
If you have uneven temperatures, drafts, or attic frost, the ceiling plane may be losing heat through both low R-value and air leakage. A visual inspection, thermal imaging, and blower-door testing can help determine whether attic hatch sealing, top-plate sealing, or added insulation should come first.
Common options include loose-fill cellulose, blown fibreglass, fibreglass batts, mineral wool, and open-cell or closed-cell spray polyurethane foam. The right choice depends on the cavity depth, moisture conditions, access, and whether the goal is thermal resistance, air sealing, or both.
Cold rooms can happen when the building still has air leaks, thermal bridging, poorly insulated rim joists, or incomplete coverage around penetrations and framing gaps. In some cases the issue is not just insulation depth, but the condition of the air barrier and vapour control layer.
Yes, attic frost often points to warm indoor air reaching a cold roof assembly through leaks in the ceiling plane, attic hatch, or penetrations. Addressing air leakage, ventilation paths, insulation coverage, and moisture conditions can help reduce the risk of condensation.
Blown-in insulation, such as cellulose or blown fibreglass, can fill irregular spaces and improve coverage over large attic areas. Batts are pre-cut pieces used in framed cavities, but they need careful fitting around wiring, plumbing, and framing to avoid gaps and compression.
Yes, basement walls, sill plates, and crawl spaces are often affected by humidity, ground moisture, and condensation risk. Material choice and air sealing should account for the concrete foundation walls, vapour movement, and how the space is connected to the rest of the home.
ACH50 is a blower-door testing result that helps show how much air is leaking from a building at a specific test pressure. It is useful for finding air barrier weaknesses, though the best insulation approach still depends on where the leaks are and how the assemblies are built.
The Ontario Home Renovation Savings program may offer a standalone attic-insulation pathway covering 50% of eligible project cost up to $1,250, depending on starting R-value and program requirements. Its bundled energy-assessment pathway may offer incentives such as up to $1,500 for attic insulation, $3,600 for exterior walls, $2,300 for foundation insulation, $300 for exposed floors, $250 for air sealing, plus a $600 home-energy-assessment rebate and potential bundle incentives. The Energy Affordability Program may also provide no-cost attic or basement insulation and draft-proofing for qualifying households, subject to household, home, and heating eligibility. Program details can change, so it is best to verify current rules before planning the work.
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Get Clear Advice For Your Insulation Project
Tell us about the rooms, drafts, cold spots, condensation, or attic issues you are seeing. We will help you understand which insulation, air-sealing, or moisture-control approach best fits the building and the conditions in Southwestern Ontario.