Attic insulation · Toronto & the GTA
Attic insulation done right, with the price on the page.
Healthy Attic Insulation tops up GTA attics to R-50 with blown-in cellulose or fiberglass. Every quote itemizes the baffles, air sealing and hatch work, and our owner's mold-remediation background means we check for moisture before we blow a single bag.
- Top-ups to R-50
- Written ventilation guarantee
- Saturdays available
- No deposit
Why homeowners call us
Four things most GTA insulation companies won't put in writing
Published prices and an instant estimate
Most insulation companies make you book a visit to learn the price. Our rates are on the pricing page: $1.20–$1.75 per sq ft, removal +$1–$2 per sq ft, and an instant estimate for your attic.
A written ventilation guarantee
Skipped baffles are the most common complaint in GTA insulation reviews. We count the baffles, price them as their own line and photograph every one before insulation covers the eaves. How baffles work.
A mold-aware inspection
Our owner works in mold remediation, so we spot staining, frost and wet sheathing that others miss. If we find mold, our partner Promold handles it before we insulate. Mold in the attic.
Saturdays, fast call-backs, no deposit
Inspections on weekday evenings and Saturdays. We aim to reply within 15 minutes during business hours, and you pay only when the job is done.
Why it matters
Why your attic needs proper insulation and ventilation
An attic works as a system. Insulation keeps heat in your living space. Ventilation keeps the attic itself cold and dry. When one is missing, the other stops working.
Why proper insulation matters
- Lower heating and cooling bills. Heat rises, and an under-insulated attic is where most of it escapes. Going from R-12 to R-50 cuts heat loss through the ceiling by about three quarters.
- Even temperatures upstairs. No more cold bedrooms in January or hot ones in July.
- Fewer ice dams. Heat leaking into the attic melts roof snow, which refreezes at the eaves and backs up under shingles.
- Summer comfort. A well-insulated attic floor stops a 50 °C attic from radiating heat into the rooms below.
Why ventilation matters
- Moisture has to leave. Everyday living puts moisture into the air. Whatever reaches the attic condenses on the cold roof deck unless outside air carries it away.
- Prevents attic mold and rot. Trapped moisture is what turns roof sheathing black and rusts nails. This is the problem our owner sees every week in mold remediation.
- Protects your roof. A cold, dry roof deck keeps shingles and sheathing lasting longer and helps stop ice dams.
- Keeps the insulation working. Damp insulation loses much of its R-value.
For professionals
Realtors, home inspectors and contractors
Fast attic fixes with photo documentation: inspection within 48 hours and a written quote within 24 hours after. Mold goes to our partner Promold, and we re-insulate.
For home inspectors
A contractor you can confidently refer, with a scope that matches your report.
Inspector services →Services
Attic insulation services in Toronto and the GTA
One narrow specialty, done completely: the attic floor.
Blown-in top-up to R-50
Cellulose or blown fiberglass over your existing insulation to about 14 inches settled, with depth checked across the whole attic.
Blown-in insulation →Insulation removal
Vacuum removal of wet, compressed, rodent-damaged or contaminated insulation before a clean re-install. $1–$2 per sq ft.
Removal →Baffles, air sealing & hatch
Soffit baffles keep the roof breathing; sealed top plates and an insulated hatch stop warm, moist air reaching the attic.
Ventilation & air sealing →Transparent pricing
A real quote, line by line
No lump sums. Every quote lists each part of the job on its own line, so you can compare scope between contractors and check every item in the after photos.
| Line on your quote | How it's priced |
|---|---|
| Blown cellulose or fiberglass to R-50 | $1.20–$1.75 per sq ft |
| Old insulation removal (only if needed) | +$1–$2 per sq ft |
| Eave baffles | Counted per bay |
| Air sealing: top plates, pipes & wires | Itemized |
| Insulated hatch cover + weatherstripping | Itemized |
Included: 1-year labour warranty, before/after photos with depth ruler, attic info card at the hatch, full cleanup. Quote valid 30 days.
Signs you need more insulation
Is your attic under-insulated?
- Upstairs rooms are colder in winter or hotter in summer than the main floor
- Heating and cooling bills keep climbing with no clear cause
- Ice dams or patchy snow melt on the roof
- You can see the tops of the ceiling joists from the hatch
- Drafts around pot lights, the attic hatch and bathroom fans
- Insulation looks thin, flattened, stained or disturbed by animals
How it works
Free inspection to after-photo report
- Free attic inspection. We measure existing depth, photograph conditions and check ventilation, baffles, the hatch and signs of moisture.
- Firm written quote. Line by line, valid 30 days. No verbal ballparks.
- Protection first. Drop sheets, shoe covers indoors, work area sealed.
- Install and verify. Baffles and air sealing first, then insulation blown to depth and checked with rulers.
- Cleanup and attic health report. Before/after photos with the ruler in frame and a written summary left at the hatch.
Service area
Attic insulation across the Greater Toronto Area
- Attic insulation Toronto
- Attic insulation North York
- Attic insulation Scarborough
- Attic insulation Etobicoke
- Attic insulation East York
- Attic insulation York
- Attic insulation Mississauga
- Attic insulation Brampton
- Attic insulation Vaughan
- Attic insulation Markham
- Attic insulation Richmond Hill
- Attic insulation Oakville
- Attic insulation Burlington
- Attic insulation Milton
- Attic insulation Pickering
- Attic insulation Ajax
- Attic insulation Whitby
- Attic insulation Aurora
- Attic insulation Newmarket
- Attic insulation Caledon
- Attic insulation King City
- Attic insulation Stouffville
FAQ
Attic insulation questions, answered
How much does attic insulation cost in Toronto?
Blown-in attic insulation in the GTA typically costs $1.20 to $1.75 per square foot installed. Your total depends on attic size, the depth you need, access, and whether old insulation has to come out first (removal adds $1 to $2 per sq ft). Use our instant estimate or book a free inspection for a firm, line-by-line written quote.
What R-value should my attic be in Ontario?
R-50 is the common retrofit target for Ontario attics. With blown cellulose that is about 14 inches of settled depth. Many older GTA homes have only R-12 to R-20 (roughly 3 to 6 inches).
Why is attic ventilation important?
Ventilation lets outside air flow in at the soffits and out at the roof vents, carrying away moisture that leaks up from the house. Without it, moisture condenses on the cold roof deck, which leads to mold, rotting sheathing, rusty nails and ice dams. Proper insulation keeps heat in the house; ventilation keeps the attic cold and dry. You need both.
Why do I need proper attic insulation?
An under-insulated attic lets heat escape all winter and lets attic heat into the house all summer, so you pay more to heat and cool and upstairs rooms stay uncomfortable. Topping up to R-50 cuts ceiling heat loss sharply, evens out temperatures and helps prevent ice dams.
How long does an attic insulation top-up take?
Most top-ups are finished in one day, including baffles, air sealing and cleanup. You can stay home during the work.
Do you do mold removal?
No. We do not perform mold remediation. If our inspection finds mold or moisture damage, we show you the photos and, with your permission, connect you with our remediation partner Promold before any insulation goes in. One call still covers both problems.
Do you work Saturdays?
Yes. We book free attic inspections on weekday evenings and Saturdays, and Saturday installs are available.
Do I pay a deposit?
No. You pay on completion, after you have seen the after photos with the depth ruler in frame.
Book your free attic inspection
We measure your existing depth, check ventilation and look for moisture, then email a line-by-line written quote. No obligation, no deposit.