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Insulation & Ventilation

Attic insulation, vapour barriers, ventilation failures

8 guides in this series

All 8 guides in this series

Attic Insulation in Ontario — R-Value Requirements and What Inspectors Find

Ontario building code requires R-60 in attics. Most existing homes have R-20 to R-40. Here is what that gap means for your energy bills and comfort.

7 min read

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Insulation Types — Fiberglass, Cellulose, Spray Foam, and Their Trade-offs

Each insulation type has different R-value, moisture behaviour, and lifespan. Here is what inspectors look for in each type.

7 min read

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Vapour Barriers — What They Do and What Happens When They Fail

A compromised vapour barrier allows warm moist interior air into cold wall cavities — creating condensation, rot, and mold inside your walls.

6 min read

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Soffit and Ridge Ventilation — The Attic Breathing System

Proper attic ventilation requires balanced intake and exhaust. When this system fails, moisture accumulates and mold follows.

6 min read

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Ice Dam Prevention Through Proper Insulation and Ventilation

Ice dams are an insulation problem, not a roof problem. Here is the insulation and ventilation configuration that prevents them.

7 min read

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Thermal Bridging — Where Heat Escapes Through Your Walls

Studs, window frames, and junctions create thermal bridges that bypass insulation. Thermal imaging reveals every one of them.

6 min read

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Bathroom Ventilation — The Most Common Code Violation in Ontario Homes

Bathroom fans venting into attics instead of outside is the single most common building code violation found in Ontario home inspections.

5 min read

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When to Walk Away — Insulation Issues That Should Stop a Purchase

Vermiculite insulation potentially containing asbestos, UFFI, and catastrophic attic ventilation failures are among the findings that change the equation.

7 min read

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Insulation & Ventilation

All 8 guides in this series

Attic Insulation in Ontario — R-Value Requirements and What Inspectors Find

Insulation Types — Fiberglass, Cellulose, Spray Foam, and Their Trade-offs

Vapour Barriers — What They Do and What Happens When They Fail

Soffit and Ridge Ventilation — The Attic Breathing System

Ice Dam Prevention Through Proper Insulation and Ventilation

Thermal Bridging — Where Heat Escapes Through Your Walls

Bathroom Ventilation — The Most Common Code Violation in Ontario Homes

When to Walk Away — Insulation Issues That Should Stop a Purchase

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Knowledge is step one. Inspection is step two.