Pre-rendered concept — your spec is built on your actual room during the free site visit.
Insulation & Draft-Proofing · Calgary
Attic Insulation Top-Up
CA$2,950 – CA$3,392
Benchmark range for your current selection · confirmed with a free site visit
Size
Finish tier
- ✓ 2-year workmanship warranty from BuildRenovate directly
- ✓ Itemized estimate within 24 hours of submitting
- ✓ No payment now — ordering starts your quote, not an invoice
- ✓ BuildRenovate is your general contractor; our subcontractors work under us
- ✓ Typical timeline: 1 week
- ✓ No permit required for insulation top-ups in most Calgary homes.
About this project
Blown-in insulation added over your existing attic insulation to bring it up to modern R-value: attic inspected and photographed first, bathroom and kitchen fans confirmed venting outside, baffles installed at the eaves to protect ventilation, attic hatch weatherstripped, then cellulose or fibreglass blown to depth with a measured depth card left in the attic. Most Calgary attics built before 2000 sit at R-20 to R-30; code-level today is R-50.
Where the money goes
Calgary benchmark ranges — your signed spec shows your exact numbers on these same lines.
| Line item | Calgary range |
|---|---|
| Blown-in insulation material | $1,300–$3,600 |
| Air sealing (Signature) | $600–$1,500 |
| Eave baffles | $180–$450 |
| Attic hatch insulation & weatherstrip | $90–$200 |
| Fan venting corrections | $150–$600 |
| Labour & site protection | $700–$1,600 |
Questions homeowners ask
How much does attic insulation cost in Calgary?
Attic insulation top-ups cost $2,950–$4,400 for a small attic and $5,450–$7,300 for a large one in 2026, or roughly $2.80–$4.20 per square foot depending on the R-value you finish at and whether air sealing is included.
How much will it actually save me?
Going from R-20 to R-50 typically cuts 10–20% off a Calgary heating bill. It is a real saving, but the bigger day-to-day difference is usually comfort — fewer cold rooms upstairs and fewer ice dams on the roof.
Are there rebates?
Federal and provincial efficiency programs periodically cover insulation upgrades. We prepare the documentation with the Signature package, including before-and-after depth records, which is what the programs ask for.
Should I remove the old insulation first?
Usually no. Topping up over existing insulation is standard and cheaper. Removal is only needed if there is rodent contamination, mould, or vermiculite — and if we find any of those, we stop and tell you before doing anything.
Want the full cost breakdown? Read the Insulation & Draft-Proofing cost guide for Calgary.
What Calgary homeowners said
Every review comes from a homeowner whose project we finished. We publish them after checking they're genuine — including the ones that aren't flattering.
