Attic Insulation in High Park
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 High Park Attic Needs Insulation
Most High Park homes—especially century homes in Roncesvalles, Victorian detached homes in High Park North, and older properties in The Junction 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 High Park 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 High Park 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 century homes and Victorian properties throughout High Park and Roncesvalles. 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 High Park 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 High Park Homeowners Choose GTA Foaming
Local expertise, honest pricing, and work we stand behind.
High Park Heritage Home Experts
We specialize in century homes and heritage properties throughout High Park, Roncesvalles, and The Junction. We understand the unique challenges of older Toronto homes.
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 High Park 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 High Park homeowners don't want to wait weeks.
Code-Compliant Installs
R-50 to R-60 for High Park attics (Climate Zone 6) per Ontario Building Code. We don't cut corners on thickness or coverage.
High Park Neighbourhoods We Serve
Fast attic insulation service throughout High Park and surrounding west Toronto communities.
Your Neighbourhood Not Listed?
We serve all of High Park area and the surrounding west Toronto. Call for a same-day quote.
Call (647) 613-3626What High Park Homeowners Say
Real feedback from attic insulation projects across the High Park area.
"Our 1920s home in Roncesvalles had horrible ice dams—icicles 3 feet long every winter. GTA Foaming sprayed open-cell in the attic and it's been two winters with zero ice buildup. Should have done this years ago. Great crew, clean work."
"The third floor of our High Park North Victorian was unbearable in summer. They sprayed closed-cell on the roof deck and now it's comfortable year-round. Energy savings are significant—about 35% reduction on our gas bill in winter."
"Got three estimates for our Junction semi. GTA Foaming was the most professional—actually climbed up and inspected the attic thoroughly. Fair price, respectful of our heritage home, finished in one day. Highly recommend for old Toronto houses."
Ontario Building Code for High Park 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 (High Park). 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 — High Park
Common questions about attic spray foam insulation for High Park homes.
Ontario Building Code recommends R-50 to R-60 for attics in Climate Zone 6, which includes all of High Park. 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 extremely common on century homes and Victorian houses throughout High Park, Roncesvalles, and The Junction. Spray foam creates an air-tight seal that prevents heat from escaping into the attic, eliminating the freeze-thaw cycle that causes ice dams and protects your historic home.
For most High Park attics, open-cell is cost-effective and provides excellent air sealing and R-value. Closed-cell is recommended for cathedral ceilings common in heritage homes, areas with limited attic depth, or situations requiring a built-in vapour barrier and maximum R-value per inch.
Attic spray foam in High Park 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 accessibility. Most residential attic projects cost between $3,000 and $8,000. Century homes may require additional prep work for old insulation removal.
Most High Park attic spray foam installations are completed in one day. A typical 1,200–1,500 sq ft attic takes 4–6 hours including prep, application, and cleanup. Parking on residential streets is coordinated in advance to minimize disruption.
Not always. If existing insulation is dry and in good condition, spray foam can sometimes be applied over it. However, many century homes in High Park have vermiculite insulation (which may contain asbestos), sawdust, or moisture-damaged materials—removal and proper disposal are recommended before spraying in these cases.
Yes. Once fully cured (24 hours), spray foam is completely inert and safe. During installation, we ventilate the work area and recommend occupants and pets stay out of the immediate area. You can return to normal use of your home the next 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 for your High Park heritage property.
Get Your Free Attic Insulation Quote
Serving High Park North, Roncesvalles, The Junction, Bloor West Village, Parkdale, and all of west Toronto. Same-day site visits available.