Attic Insulation in North York
Your attic is where up to 40% of your home's heat escapes. Spray foam insulation air-seals and insulates in one step—stopping ice dams, cutting energy bills, and keeping every floor comfortable year-round.
Signs Your North York Attic Needs Insulation
Most North York homes—especially in Yorkdale, Downsview, and Amesbury built before 2010—have inadequate attic insulation. Here's how to tell.
Ice Dams in Winter
Icicles hanging from your eaves mean heat is escaping through the attic and melting rooftop snow. This freeze-thaw cycle damages shingles, gutters, and causes interior leaks.
Uneven Temperatures
Second floor is sweltering in summer and freezing in winter while the main floor is fine? That's your attic failing to contain conditioned air.
High Energy Bills
If your heating costs keep climbing despite a functioning furnace, air leakage through the attic is likely the culprit. It's the #1 source of heat loss in most homes.
Moisture or Mould
Condensation in the attic, damp rafters, or visible mould growth indicate warm humid air from your home is reaching the cold attic space. Spray foam stops this.
Drafts & Cold Spots
Feel cold air near light fixtures, attic hatches, or recessed lights on the top floor? These are air leakage points that only spray foam can properly seal.
Old or Settled Insulation
Fibreglass batts sag and compress over time, losing up to 50% of R-value. Blown-in cellulose settles. If your insulation is 15+ years old, it's likely underperforming.
Open-Cell vs Closed-Cell for North York Attics
The right foam depends on your attic type, budget, and goals. Here's a side-by-side comparison.
| Feature | Open-Cell (½ lb) | Closed-Cell (2 lb) |
|---|---|---|
| R-Value per Inch | R-3.7 | R-6.5 |
| Air Sealing | Excellent | Excellent |
| Vapour Barrier | No — vapour permeable | Yes — at 2" thickness |
| Moisture Resistance | Absorbs water | Waterproof |
| Structural Strength | Flexible, no racking strength | Adds wall/roof rigidity |
| Sound Dampening | Superior — absorbs sound | Good |
| Cost per Sq Ft | $1.50 – $3.50 | $3.00 – $5.00 |
| Best For | Vented attic floors, cathedral ceilings where vapour permeability is needed | Unvented roof assemblies, flat roofs, cathedral ceilings, basements |
Not sure which is right for your attic? We'll recommend the best option during your free site assessment.
Where We Apply Attic Spray Foam
Every attic is different. We insulate all common attic configurations found in North York homes.
Attic Floor (Ceiling Joists)
Standard application for vented attics. Spray foam between and over joists creates a continuous air barrier on the ceiling plane.
Roof Deck (Underside of Sheathing)
Creates an unvented, conditioned attic space. Ideal when HVAC equipment or ductwork is in the attic.
Cathedral Ceilings
Between rafters for vaulted rooms. Closed-cell is typically required to achieve code R-value in the limited rafter depth.
Knee Walls
Common in Cape Cod and 1.5-storey homes throughout North York. Seals the transition between conditioned and unconditioned space.
Attic Hatches & Pull-Down Stairs
Major air leakage points that most insulation methods miss. We seal and insulate these access points completely.
Rim Joists
Where the attic floor meets exterior walls. Often overlooked, rim joists are a significant source of air leakage and heat loss.
How Attic Insulation Works
From quote to completion—most North York attic jobs are done in a single day.
Free Site Assessment
We inspect your attic, measure square footage, check existing insulation, and identify air leakage points. You get a detailed quote.
Prep & Protection
We mask and protect your home's interior, set up ventilation equipment, and prepare the attic for spraying.
Spray Application
Our crew applies spray foam to the specified thickness, ensuring complete coverage with no gaps or thermal bridges.
Inspection & Cleanup
We verify thickness and coverage, trim any excess foam, clean up completely, and walk you through the finished job.
Why North York Homeowners Choose GTA Foaming
Local expertise, honest pricing, and work we stand behind.
Serving North York Daily
We work throughout North York every week—from Yorkdale to Bathurst Manor, Amesbury to Downsview. We know the housing stock and building styles of the area.
Fully Licensed & Insured
Full liability insurance, WSIB coverage, and installations that meet or exceed Ontario Building Code requirements.
Upfront Pricing
Detailed written quotes before any work starts. No hidden fees, no surprises. We price per square foot so you know exactly what you're paying.
Real Job Photos
We document every project with before and after photos. Check our North York project gallery to see our work.
Same-Day Quotes
Contact us in the morning, get a site visit and written quote the same day. We know North York homeowners don't want to wait weeks.
Code-Compliant Installs
R-50 to R-60 for North York attics (Climate Zone 6) per Ontario Building Code. We don't cut corners on thickness or coverage.
North York Neighbourhoods We Serve
Fast attic insulation service throughout North York's western neighbourhoods and surrounding communities.
Your Neighbourhood Not Listed?
We serve all of North York and the surrounding GTA. Call for a same-day quote.
Call (647) 613-3626What North York Homeowners Say
Real feedback from attic insulation projects across North York.
"Our Yorkdale home had massive ice dams every year—water would leak down the walls in February. GTA Foaming sprayed open-cell foam in the attic and the issue is completely solved. No more ice buildup, no more damage. Wish we'd done this 5 years ago."
"The upstairs bedrooms in our Downsview bungalow were unbearably hot in summer—AC couldn't keep up. GTA Foaming sprayed the roof deck with closed-cell foam and now it's comfortable year-round. Our hydro bill dropped by about 25% too."
"Got quotes from three companies for our Bathurst Manor home. GTA Foaming was the only one who actually climbed into the attic to measure—the others just guessed. Professional crew, fair price, finished in one day. Highly recommend."
Ontario Building Code for North York Attics
What you need to know about insulation requirements for homes in Climate Zone 6.
R-50 to R-60 Required
Ontario Building Code specifies R-50 minimum for attic insulation in Climate Zone 6 (North York). New builds and major renovations must meet this standard.
Ignition Barrier Required
Spray foam in accessible attics requires an ignition barrier or thermal barrier depending on the application and foam type. We ensure compliance on every job.
Ventilation Standards
Vented attics need proper soffit-to-ridge airflow maintained. Unvented assemblies require specific foam types and thicknesses. We design for both.
Attic Insulation FAQ — North York
Common questions about attic spray foam insulation for North York homes.
Ontario Building Code recommends R-50 to R-60 for attics in Climate Zone 6, which includes all of North York. With spray foam, you can achieve this with approximately 8–10 inches of open-cell or 7–8 inches of closed-cell foam.
Yes. Ice dams are a common problem in North York, especially in older neighbourhoods like Downsview and Yorkdale. Spray foam creates an air-tight seal that prevents warm air from escaping into the attic, eliminating the freeze-thaw cycle that causes ice dams.
For most North York attics, open-cell is the most cost-effective choice and provides excellent air sealing and R-value. Closed-cell is best for cathedral ceilings, flat roofs, or situations requiring a built-in vapour barrier and maximum R-value per inch.
Attic spray foam in North York typically ranges from $1.50 to $3.50 per square foot for open-cell, and $3.00 to $5.00 for closed-cell, depending on thickness and attic accessibility. Most residential attic projects cost between $3,000 and $8,000.
Most North York attic spray foam installations are completed in one day. A typical 1,200–1,500 sq ft attic takes 4–6 hours including preparation, foam application, and cleanup. Larger or more complex attics may require additional time.
Not always. If your existing insulation is dry and in good condition, spray foam can sometimes be applied over it. However, if there's mould, moisture damage, or vermiculite insulation (which may contain asbestos), we recommend removal before spraying.
Yes. Once fully cured (24 hours), spray foam is completely inert and safe. During installation, we ventilate the work area and recommend that occupants and pets stay out of the immediate area. You can resume normal use of your home the following day.
Spray foam applied to the attic floor (vented attic design) does not affect your roof warranty. Spraying the underside of the roof deck (unvented assembly) may impact some shingle warranties. We'll discuss this during your site assessment and help you make an informed decision.
Get Your Free Attic Insulation Quote
Serving Yorkdale, Downsview, Amesbury, Bathurst Manor, Armour Heights, and all of North York. Same-day site visits available.