Roofing guides · Calgary
Calgary code calls for R-60 above the ceiling. Here is what blown fibreglass, cellulose and spray foam really cost per square foot, why the baffles and venting have to be fixed at the same time, and the verified status of every rebate in 2026.
Written by Johnny Anderson, owner of Mountain Standard Roofing Ltd. · Updated 2026-09-01
Most Calgary attics we open up are short on insulation, short on airflow, or both. Topping up is one of the cheapest things you can do to a house — but only if the ventilation, baffles and air sealing get fixed in the same visit. Here is what it costs, what R-value you should be aiming at, and which rebates are genuinely still open in 2026.
The City of Calgary states that the National Building Code – Alberta Edition requires RSI 10.43 (R-60) in ceilings below attics, and RSI 3.08 (R-22) in above-grade framed walls, according to its Climate ready measures: Insulation guidance.
Existing houses are not forced to upgrade, but R-60 is the number worth hitting because it is the current new-build standard for this climate. What we actually find in Calgary attics:
Going from R-20 to R-60 in a 1,200 sq ft attic is roughly a two-thirds cut in heat loss through that ceiling. Going from R-50 to R-60 is not worth writing a cheque for. Measure the depth before you buy anything — see our attic insulation page for how we do it.
For 90% of Calgary attics the right answer is: air seal, fix the baffles and venting, then blow fibreglass or cellulose to a marked R-60 depth.
These are typical installed Calgary-area ranges, not a quote. Attic pitch, access, hatch location, wiring, pot lights and how much old material has to come out move the number more than the insulation itself does.
| Scope | Cost per sq ft of attic floor (CAD) | Typical 1,200 sq ft attic |
|---|---|---|
| Blown fibreglass top-up to R-60 (existing insulation stays) | $1.80 – $3.00 | $2,200 – $3,600 |
| Blown cellulose top-up to R-60 | $2.20 – $3.60 | $2,600 – $4,300 |
| Air sealing package (top plates, penetrations, hatch, pot-light covers) | $0.90 – $2.00 | $1,100 – $2,400 |
| Remove and dispose of old/contaminated insulation | $1.20 – $2.20 | $1,450 – $2,650 |
| Full removal + air seal + reinsulate to R-60 | $4.00 – $7.50 | $4,800 – $9,000 |
| Closed-cell spray foam, targeted (per sq ft of foamed area, 2 in.) | $4.50 – $7.00 | Usually $600 – $2,500 of a job |
| Insulation baffles / rafter vents (per baffle installed) | $12 – $25 each | $600 – $1,400 |
| Added roof or soffit vents to reach 1:300 | $150 – $350 per vent | $450 – $1,800 |
For reference, the City of Calgary's own figures put blown fibreglass, cellulose or mineral wool at about $0.04–$0.06 per sq ft to add one unit of R, and closed-cell polyurethane foam at about $0.15 per sq ft per R — roughly a 3× difference in material cost per unit of R.
A straight top-up on an average Calgary bungalow lands between $2,200 and $4,300. A gut-and-redo with proper air sealing on a two-storey with a cut-up attic lands between $5,000 and $9,000. If you have a written quote from another Calgary contractor for the same scope, bring it — MSR's $500 price-beat guarantee means we beat it by $500.
Insulation without airflow is how you get frost on the sheathing in February and a stained ceiling in March. Blowing 20 inches of fibreglass into an attic with plugged soffits makes the problem worse, not better, because the attic gets colder and any humid indoor air that leaks up there condenses before it can vent out. NRCan spells this out in Keeping the Heat In, Section 5: Roofs and attics.
Skip the baffles and the blown insulation drifts into the soffit cavity, chokes the intake, and you have paid for R-60 while getting R-30 at the eave and ice dams at the edge. If your roof is already showing ice damming, read that alongside our roof repair and roof replacement pages — the fix is usually the attic, not the shingles.
Depth first. We measure existing insulation depth in several spots, check the baffles at the eaves and count vent area before quoting a top-up.
A lot of contractor websites still advertise money that no longer exists. Honest status of each programme as of 1 September 2026:
| Programme | Status for Calgary in 2026 | What it's worth |
|---|---|---|
| Canada Greener Homes Grant (NRCan) | Closed. Applications ran May 2021 to February 2024; 31 December 2025 was the final day to upload documents, and payment requests are no longer accepted. | Nothing available now (average grant was about $4,430) |
| Canada Greener Homes Loan (NRCan) | Closed. NRCan states funding is fully committed and new loan applications cannot be approved. Already-approved loans are unaffected. | Was up to $40,000 interest-free |
| Canada Greener Homes Affordability Program | Not open to Alberta households at the time of writing. It runs through participating provinces, and NRCan's page lists BC, Manitoba, Nova Scotia, PEI and Quebec — not Alberta. The programme is also being transitioned to Environment and Climate Change Canada. | No-cost insulation retrofits for low-to-median-income households, where a province delivers it |
| City of Calgary Clean Energy Improvement Program (CEIP) | Live programme, but between intakes. The City's page invites you to sign up for updates "to learn when the program reopens," and says the 2026 interest rate will be posted one week before the application date. It is financing, not a rebate. | Up to 100% of project cost to a maximum of $50,000, repaid on your property tax bill over up to 20 years |
| City of Calgary Resilient Roofing Rebate Program | Ended. The $3,000 Class 4 impact-resistant roofing rebate ran from June 2021 and wound up in 2022; City administration recommended in 2025 against bringing it back as part of the hail resilience plan. | Nothing available now |
| Alberta Energy Rebate | Open 1 July to 30 September 2026 — but it is a one-time $100 affordability payment per eligible person, not an insulation incentive. | $100 per eligible person |
| Alberta province-wide insulation rebate | Does not exist in 2026. Ontario's Home Renovation Savings Program is sometimes quoted at Albertans online — it is an Ontario programme and does not apply here. | Nothing |
Plain version: there is no federal or provincial attic insulation grant a Calgary homeowner can apply for today. The one real municipal tool is CEIP, and it is a property-tax-financed loan, not free money. Attic insulation is on the City's list of eligible clean energy improvements, and CEIP can be combined with other programmes where those exist. If a contractor tells you otherwise, ask them to show you the live application page.
One more caution: CEIP does not apply retroactively. The application has to be submitted and approved, and the agreement signed, before any work starts, and the work has to be done by a CEIP-qualified contractor.
The City of Calgary's Permits for Clean Energy Improvements document is clear: ordinary attic insulation does not need a building permit, and neither does air sealing. Spray foam applied directly to the underside of the roof sheathing does need a building permit. Exterior wall insulation needs one too, which matters if the attic work is part of a bigger full exterior renovation.
If your upstairs is cold, your ice dams keep coming back, or you just want to know what is actually up there, we will go up, measure it and tell you straight — including when the answer is "leave it alone." Book a free inspection through our quote page, or call (587) 577-6170. We work Calgary, Airdrie, Cochrane, Chestermere, Okotoks, High River, Strathmore, Red Deer, Brooks and Claresholm — see the Calgary roofing page for local details.
Questions homeowners actually ask
What R-value should attic insulation be in Calgary?
Aim for R-60. The City of Calgary states the National Building Code - Alberta Edition requires RSI 10.43 (R-60) in ceilings below attics for new construction. Existing homes are not forced to upgrade, but R-60 is the right target for this climate. Most Calgary attics built before 2000 sit somewhere between R-12 and R-32, so there is usually real room to improve.
How much does attic insulation cost in Calgary?
A straight blown top-up to R-60 typically runs $1.80 to $3.60 per square foot of attic floor, so about $2,200 to $4,300 on a 1,200 square foot attic. A full removal with proper air sealing and reinsulation runs $4.00 to $7.50 per square foot, or roughly $5,000 to $9,000. Pitch, access and how much old material comes out drive the spread.
Is the Canada Greener Homes Grant still available in 2026?
No. Natural Resources Canada's page states the programme is closed. Applications were open from May 2021 to February 2024, and 31 December 2025 was the final day to upload documents. Payment requests are no longer accepted. The Canada Greener Homes Loan is also closed because its funding is fully committed.
Are there any attic insulation rebates in Calgary right now?
There is no federal or Alberta grant a Calgary homeowner can apply for today. The one live municipal tool is the City of Calgary's Clean Energy Improvement Program, and it is financing, not a rebate: up to 100 per cent of project cost to a $50,000 maximum, repaid through your property tax bill. The City's page currently asks residents to sign up for notice of when it reopens.
Do I need a permit for attic insulation in Calgary?
Generally no. The City of Calgary's permit guidance for clean energy improvements says ordinary attic insulation and air sealing do not require a building permit. The exception is spray foam applied directly to the underside of the roof sheathing, which does require a building permit because it changes how the roof assembly dries.
Do I need more attic vents if I add insulation?
Usually yes, or at least you need the existing vents unblocked. NRCan recommends a 1:300 ratio of unobstructed vent area to insulated ceiling area for peaked roofs, split roughly half soffit intake and half ridge or roof exhaust, with 38 to 50 mm of clear space above the insulation held open by baffles in every rafter bay.
Is spray foam better than blown insulation in an attic?
Better per inch, worse per dollar. Closed-cell foam gives R-5.5 to R-6.5 per inch and acts as an air barrier, but costs roughly three to four times more per unit of R. In a vented Calgary attic we use it in targeted spots such as top plates and chimney chases, then blow fibreglass or cellulose to R-60 across the ceiling.
We measure the roof, count the penetrations, look at the decking and give you a written quote with the scope itemised — free, no obligation. Bring us a written quote from another Calgary roofer for the same scope and we will beat it by $500.
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Every review below is a verified Google review of Mountain Standard Roofing Ltd. Backed by our 10-year workmanship warranty and our $500 price-beat guarantee.
★★★★★
“Mountain Standard Roofing handled my storm damage roof replacement perfectly. They worked directly with my insurance company, handled all the paperwork, and made the entire process stress-free. The crew was professional, efficient, and left my yard clean.”
Nikki Rick — Google review
★★★★★
“John and his team were awesome to deal with. He did my roof and siding and they finished a day ahead of schedule. Not only was the service awesome but the price was much better than competitors.”
Kristoffer — Google review
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“The owner John is very communicative and always took time to answer our questions. Our roof was re-done in the agreed timeline and for the agreed upon price. Would highly recommend doing business with Mountain Standard Roofing.”
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