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Insulation Myths Debunked: What Actually Works in Canadian Homes

  • dking43224
  • Sep 3
  • 2 min read

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When it comes to insulation, Ontario homeowners are bombarded with conflicting advice. Some myths have been around for decades, while others are fueled by quick DIY fixes that don’t hold up to Canadian winters. Believing these myths can mean higher energy bills, cold rooms, and even moisture damage.

At Enerliv, we set the record straight. Here are the top insulation myths debunked — and what actually works for Canadian homes.


Myth #1: All Insulation Works the Same

The Truth: Not all insulation materials are created equal. Fiberglass batts, spray foam, cellulose, and rigid foam each have different R-values, air-sealing capabilities, and durability.


What Works:

  • Spray foam creates an air-tight seal, making it one of the most effective options for Canadian winters.

  • Batt and poly are cost-effective for walls and ceilings when installed correctly.

  • Attic insulation upgrades with blown-in or batt insulation are essential for reducing heat loss.


Myth #2: Insulation Only Matters in Winter

The Truth: Insulation isn’t just about keeping heat in — it’s about controlling comfort year-round. In summer, proper insulation keeps hot air out and reduces strain on your A/C.


What Works:

  • Attic insulation prevents heat from radiating into living spaces.

  • Spray foam insulation adds year-round energy efficiency by reducing air leakage.


Myth #3: You Don’t Need to Replace Old Insulation

The Truth: Insulation settles, compresses, and loses effectiveness over time. Some older materials (like vermiculite) may even contain asbestos, making upgrades essential.


What Works:

  • Regularly inspect your attic and basement insulation for gaps, moisture, or deterioration.

  • Upgrading to modern materials like spray foam or new batt and poly provides better performance and safety.


Myth #4: Insulation Alone Stops Drafts

The Truth: Insulation reduces heat transfer, but air sealing is what actually stops drafts. Without sealing, heat and cold can bypass insulation entirely.


What Works:

  • Spray foam insulation doubles as insulation and air sealing.

  • Caulking, weatherstripping, and sealing gaps around windows, doors, and vents are just as important.


Myth #5: Fireproofing Isn’t Necessary in Homes

The Truth: Fire protection isn’t just for commercial buildings. Spray foam insulation must be covered with a thermal barrier, and some parts of your home may require additional fireproofing to meet Ontario Building Code standards.


What Works:

  • Spray-applied fireproofing ensures safety and compliance in basements, attics, and multi-unit homes.

  • Always check that insulation installations follow proper Canadian building code requirements.


📌 Final Thoughts: Get the Facts Before You Insulate

Insulation myths can cost Ontario homeowners thousands in wasted energy and preventable repairs. By focusing on the facts — and working with trusted experts — you can maximize comfort, efficiency, and safety in your home.


At Enerliv, we help homeowners make smart insulation choices with spray foam, attic insulation, batt and poly, and fireproofing solutions.

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