Attic Insulation Markham
Rebate Available Up To $1,250 on standalone attics
Get your insulation upgrade today
Why Your Markham Attic Is Costing You More Than It Should
If your upstairs rooms run hot in July and cold in January, or your heating bill climbs every winter without an obvious reason, the attic is usually where the problem starts. Heat rises. In an under-insulated or poorly air-sealed attic, that heat escapes straight through the roof — and in winter, warm air leaking up from your living space can melt snow unevenly on the roof and contribute to ice damming along the eaves, a problem we see regularly on older Markham homes. Insulation quality varies a lot across Markham because the housing stock does. Homes in established neighborhoods like Thornhill and Markham Village were often built to insulation standards that are decades out of date. Newer builds in Cornell and Wismer are built to current code — but "meets code" and "installed correctly" aren't always the same thing, and even a new attic can underperform if the air barrier wasn't sealed properly during construction.
Contact Us
Why Homeowners Choose Pro Insulation Contracting
A Markham Company, Not a Markham Stop on Someone Else's Route
10AM–4PM, when a lot of other GTA insulation contractors are closed.
Spray foam, blown-in, batt, drywall, vapour barrier, garage ceilings, AeroBarrier air sealing — if your attic project uncovers a related issue, you don't need to hire a second contractor.
We install Johns Manville, Owens Corning, CertainTeed, and other manufacturer-backed products — not the cheapest material we can find.
Expert Advice
Signs You Need an Attic Insulation Upgrade
- Uneven temperatures between floors — upstairs rooms noticeably hotter or colder than the rest of the house
- Rising heating or cooling bills without a clear cause
- Ice buildup or icicles forming unevenly along the roofline in winter
- Visible gaps, compressed insulation, or bare spots when you look into the attic
- Drafts near ceiling fixtures, attic hatches, or top-floor rooms
- An attic that was never insulated to current standards, or hasn't been touched since the home was built
If two or more of these sound familiar, it's worth a free inspection before winter — not after the first cold snap makes it obvious.
How It Works
What Happens After You Call
Free in-home inspection
We look at your actual attic — existing insulation depth, air sealing gaps, ventilation, and any moisture or pest issues — not a guess over the phone.
Straightforward quote
You get a clear scope and price before any work starts.
Determine your eligibility for rebate
We will help you apply and determine the eligibility for any potential rebates.
Installation
Most residential attic insulation jobs are completed in a single day.
Markham Homeowners May Qualify for Rebates
Depending on current program rules, Markham homeowners upgrading attic insulation may be eligible for rebates through the Enbridge Home Renovation Savings program or the Canada Greener Homes Loan. Program terms, eligibility, and dollar amounts change, so we verify current details with you at the time of your quote rather than publishing figures that may be out of date. For the latest information, see our Home Renovation Savings and Canada Greener Homes Loan pages.
Services
Attic Insulation Options for Markham Homes
Blown-In Insulation (Cellulose & Fiberglass)
- We blow loose-fill cellulose or fiberglass to fill gaps around joists, wiring, and awkward corners that batt insulation misses
Spray Foam Insulation
- Open-cell and closed-cell options for attics that need both insulation and air sealing in one step — perfect for homes with drafts, etc
Fiberglass Batt Insulation
- A cost-effective option for straightforward attic spaces without complicated framing. Contact us for batt insulation in Markham today.
Attic Insulation Removal
If your existing insulation is contaminated, compressed, or affected by pests or moisture, we remove it before installing new material — starting fresh instead of insulating over a problem.
Serving Every Markham Neighborhood
We work across all of Markham, including Unionville, Cornell, Milliken Mills, Berczy Village, Thornhill, Markham Village, Cathedraltown, Wismer, Box Grove, and Angus Glen. Whether you're in an established neighbourhood with an older attic or a newer build that still isn't performing the way it should, we quote the job the same way: with an actual in-person look at your attic, not a phone estimate.
Attic Insulation Markham — Frequently Asked Questions
Ontario Building Code sets minimum attic insulation requirements, and older Markham homes are often well below current recommendations.
Possibly — rebate eligibility depends on your home, the current program rules, and sometimes an energy assessment. We confirm your eligibility as part of your free quote rather than guessing over the phone. See our rebate page for current program details.
It depends on your attic's shape, whether you're dealing with drafts as well as heat loss, and your budget. Blown-in insulation is often the more cost-effective option for straightforward attics; spray foam adds air sealing in one step and tends to suit homes with more complex rooflines or persistent drafts. We'll recommend one during your free inspection rather than before we've seen the attic.
Often, yes. Older homes may have settled or compressed insulation, outdated ventilation, or air sealing gaps that a newer build typically won't have — though a new build can still underperform if it wasn't sealed correctly during construction. Every attic gets assessed individually.
We recommend it. Attic conditions vary enough — insulation depth, moisture, ventilation, pest activity — that a phone-only estimate is a guess. Our inspections are free and no-obligation.
We serve all of Markham, including Unionville, Cornell, Milliken Mills, Berczy Village, Thornhill, and Markham Village. If you're unsure, call us at (416) 315-0471 and we'll confirm.
Yes — spray foam, blown-in, batt, drywall, vapour barrier, garage ceiling insulation, and AeroBarrier air sealing.
The amount of insulation your home needs will depend on a few factors – where you live and how old your home is. Different climates will require different R-values and the older your home is, the more insulation it will probably need.
Calculating savings will depend on where you live, how much insulation you’ve put in/are putting into your home, and what kind of heating system and cooling system you have in your home.
The minimum building code for an attic is R-60, but it is minimum for a reason, it is the absolute minimum a builder is required to install in a new home. If you are paying for the heating and air conditioning more is better in this case, to protect your heating and cooling dollars.
To get started on your project, give us a call or send us an email. We will then book an in-person consultation with one of our estimators.