Attic Insulation in Mississauga
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 Mississauga Attic Needs Insulation
Many Mississauga homes—especially in Port Credit, Streetsville, and Cooksville 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 Mississauga 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 Mississauga 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 Lorne Park and Clarkson. 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 Mississauga 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 Mississauga Homeowners Choose GTA Foaming
Local expertise, honest pricing, and work we stand behind.
Serving All of Mississauga
From Square One to Port Credit's waterfront, from Meadowvale to Churchill Meadows—we serve every Mississauga neighbourhood. Fast response times and same-day quotes.
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 Mississauga 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 Mississauga homeowners don't want to wait weeks.
Code-Compliant Installs
R-50 to R-60 for Mississauga attics (Climate Zone 6) per Ontario Building Code. We don't cut corners on thickness or coverage.
Mississauga Neighbourhoods We Serve
Fast attic insulation service throughout Mississauga and surrounding communities.
Your Neighbourhood Not Listed?
We serve all of Mississauga and the surrounding GTA. Call for a same-day quote.
Call (647) 613-3626What Mississauga Homeowners Say
Real feedback from attic insulation projects across Mississauga.
"We had terrible ice dams every year at our Port Credit home—water stains on the ceiling, damaged gutters. GTA Foaming sprayed the attic with open-cell foam and this winter was completely ice-free. Best investment we made in the house."
"Our Erin Mills house had unbearable heat on the second floor every summer. The crew insulated the roof deck with closed-cell foam and the difference is incredible. The AC keeps up now and our energy bills dropped by 30%."
"Fast, professional, and clean. They showed up on time to our Streetsville home, finished the entire attic in one day, and cleaned up like they were never there. Our upstairs is finally comfortable. Highly recommend GTA Foaming."
Ontario Building Code for Mississauga 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 (Mississauga). 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 — Mississauga
Common questions about attic spray foam insulation for Mississauga homes.
Attic spray foam in Mississauga typically costs $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. Average projects range from $3,000 to $8,000.
Ontario Building Code requires R-50 to R-60 for attics in Climate Zone 6, which includes Mississauga. This translates to approximately 8-10 inches of open-cell or 7-8 inches of closed-cell spray foam.
Yes. Ice dams occur when heat escapes through the attic and melts snow on the roof. Spray foam creates an airtight seal that prevents heat loss, eliminating the freeze-thaw cycle that causes ice dams on Mississauga homes.
Most Mississauga attics do well with open-cell foam, which is cost-effective and provides excellent air sealing. Closed-cell is better for cathedral ceilings, flat roofs, or when you need a vapour barrier and maximum R-value per inch.
Most Mississauga attic spray foam projects are completed in one day. A typical 1,200-1,500 sq ft attic takes 4-6 hours including prep, application, and cleanup.
Not always. If existing insulation is dry and in good condition, spray foam can be applied over it. However, removal is recommended if there's mould, water damage, or vermiculite (potential asbestos) present.
Absolutely. Spray foam prevents heat from entering through the attic in summer, keeping upper floors cooler and reducing AC costs. Many Mississauga homeowners report significant improvements in second-floor comfort.
Yes. Spray foam is ideal for older homes in neighbourhoods like Port Credit, Cooksville, and Mineola. It seals air leaks that traditional insulation misses, making older homes more energy-efficient without extensive renovations.
Ready to Insulate Your Mississauga Attic?
Stop losing heat through your attic. Get a free quote and start saving on energy bills.