HEALTHY ATTICINSULATION

Guides

Attic insulation guides

Straight answers from an installer, written for Ontario homes.

By Selva, owner of Healthy Attic Insulation · Updated October 16, 2026

Ice dams: what causes them and how to stop them

What causes ice dams on GTA roofs, the warning signs, and why air sealing, ventilation and R-50 attic insulation fix the cause. Written by a GTA attic insulation installer.

Cellulose vs fiberglass: which is better for your attic?

Blown cellulose vs blown fiberglass for Ontario attics: R-value per inch, depth for R-50, bags needed, moisture, cost and when each is the right choice.

How long does attic insulation last? 8 signs you need more

How long attic insulation lasts, why it loses performance, and 8 signs your Toronto or GTA attic needs a top-up or replacement. Includes a 2-minute DIY check.

How much attic insulation do you need in Ontario?

R-values, depth chart and a DIY check.

Ontario attic insulation rebates in 2026

What the Home Renovation Savings Program offers and how to compare quotes.

Attic insulation cost in Toronto

Published rates, what changes the price, and an instant estimate.

Mold in the attic

Signs, causes, and why you fix moisture before insulating.

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