Attic Insulation vs. Spray Foam: What’s Best for BC Homes?

 

 

If you’re upgrading your attic insulation in BC, you’ve probably seen two main options: blown-in fiberglass and spray foam. Both have their place  but depending on your home, goals, and budget, one clearly stands out.

At InsulationBC.com, we specialize in R50+ blown-in fiberglass attic insulation, and here’s why we often recommend it over spray foam for most homeowners across Coquitlam, Surrey, and the Lower Mainland.

1. Coverage and Breathability

Blown-in insulation fills every crevice of your attic while still allowing for proper airflow. This is essential in BC’s damp climate, where attic ventilation is crucial for preventing mold and moisture buildup.

Spray foam can create an airtight seal, but in many homes, that’s overkill  and it may even interfere with your ventilation system if not installed perfectly.

2. Cost-Effective for Large Areas

Blown-in fiberglass offers excellent performance at a lower cost per square foot, making it ideal for covering large attic spaces without breaking the bank. Spray foam can be 2–3x the cost and is often overkill in attics where structural sealing isn’t necessary.

3. Fire Resistance and Safety

Blown-in fiberglass is known for being highly fire-resistant, offering strong protection compared to many other insulation types. Spray foam, on the other hand, can ignite more easily and release toxic fumes if exposed to fire. This is an important consideration for attic spaces near wiring and HVAC equipment.

4. Easy to Upgrade

Blown-in insulation can be topped up later if needed. It integrates well with existing insulation and future retrofits. Spray foam is more permanent but also harder and more expensive to modify down the road.

5. Proven Performance in BC Homes

Blown-in fiberglass has been trusted in tens of thousands of BC homes and performs exceptionally well when paired with proper ventilation and vapor barrier control.

So What’s Best for You?

If you’re dealing with a damp, drafty attic and want better efficiency, comfort, and value  blown-in fiberglass insulation is often the smarter choice.

We offer free attic inspections and expert R50+ blown-in installs tailored to the BC climate.

👉 Contact us to book your assessment.