Fiberglass insulation is one of the most common types of thermal insulation used in residential and commercial construction, particularly in new home builds across Ontario and other parts of North America. This insulation is popular with homeowners for its cost-effectiveness and easy installation.  It typically comes in batt or roll form, pre-cut to standard stud and joist spacing, which makes it easy to install in walls, attics, basements, and ceilings.

✅What is Fiberglass Insulation?

Fiberglass insulation is made from extremely fine glass fibers. It traps pockets of air, slowing heat transfer and helping maintain a consistent indoor temperature. It’s often backed with kraft paper or foil, which also acts as a vapor barrier.

✅ Pros of Fiberglass (Batt) Insulation:

  • Cost-effective: One of the cheapest insulation options available.

  • Widely available: Easy to source from hardware stores.

  • Easy to install: Especially in open wall cavities before drywall goes up.

  • Fire-resistant: Glass fibers don’t burn easily.

  • Good thermal performance: R-values typically range from R-12 to R-40, depending on thickness and density.

  • Moisture-resistant (to some extent): Does not absorb water; won’t support mold growth.

❌ Cons of Fiberglass Insulation:

  • Can irritate skin, eyes, and lungs: Protective gear is recommended during installation.

  • Air leakage: On its own, it doesn’t air-seal; air can pass through gaps.

  • Loser performance if compressed: Reduces R-value if not installed properly.

  • Not mold-proof: While fiberglass doesn’t support mold, dust and debris trapped in it can.

  • Settles over time: Especially in vertical cavities, which can reduce effectiveness.

 

  🛠️ Maintenance Tips for Fiberglass Insulation

  • Conduct Regular Inspections
    Check the insulation periodically for signs of damage, moisture intrusion, or mold growth. Early detection can prevent more serious issues.

  • Seal Air Leaks
    Seal gaps around doors, windows, pipes, and electrical outlets to eliminate drafts. This helps maintain consistent indoor temperatures and maximizes insulation efficiency.

  • Replace Damaged Sections Promptly
    If you find any areas with compressed, wet, or deteriorated insulation, replace it immediately to preserve overall thermal performance.

 

✅ Building Code Compliance – Ontario

Yes, fiberglass batt insulation meets Ontario’s minimum building code requirements as long as it’s installed correctly and meets the required R-values for the specific part of the home.

Ontario Building Code (OBC) Examples:

  • Exterior above-grade walls: Typically require minimum R-22 (in newer energy-efficiency tiers).

  • Attics: Minimum R-60 is standard.

  • Basement walls: At least R-20 continuous insulation or equivalent performance.

  • Floor over unheated space: Around R-31.

These values may vary based on updates or which energy efficiency tier the build falls under (e.g., Tier 1, Tier 2 in OBC SB-12 or Energy Star homes).

👷 Common Use in New Construction:

Fiberglass batt insulation is often used during the framing stage, installed between studs in:

  • Exterior walls

  • Basement foundation walls

  • Floor joists (especially over unconditioned space)

  • Attics (sometimes in combo with blown-in insulation)

It’s often paired with vapor barriers, air barriers, or spray foam in problem areas (around windows and rim joists) to increase air sealing.

Fiberglass insulation remains a cost-effective and versatile way to boost your home’s energy efficiency and comfort. With proper installation and routine maintenance, you can ensure long-lasting performance for years to come. Whether, you are renovating or building, contact us at Polar Bear Spray Foam Inc, we can assist you with all your insulation projects.

Polar Bear Spray Foam Inc’s Service Area includes; Manitoulin Island, The North Shore, Greater City of Sudbury & its Surrounding Areas, Sturgeon Falls and North Bay.