Roof Ventilation Upgrade with Roof Replacement in Calgary
A new roof only lasts as long as the air under it allows. When we replace your roof, we check and balance the intake and exhaust vents so heat and moisture can escape.
- Intake and exhaust balanced
- Vents sized for your roof
- Done during replacement
- 10-Year Labour Warranty
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Mention any frost, damp insulation or very hot upper rooms you have noticed.
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Ridge cap and exhaust vent
Why venting matters for your roof
Warm, damp air from the house rises toward the underside of the roof deck. Without enough exhaust at the top and intake at the soffit, it condenses on the underside of the deck in winter. Frost, damp insulation and mould follow, and shingles bake from below in summer.
Poor airflow is also behind most ice dams, because a warm deck melts snow that refreezes at the cold eaves.
- Less frost and condensation
- Cooler upper rooms in summer
- Shingles last longer
- Fewer winter leaks
New vent and flashing
Balanced, not just added
More vents are not always better. We work out how much intake and exhaust your roof needs, then install the right mix of box, ridge or power vents with new flashing. Blocked soffit intake gets opened up so air can flow from eave to ridge.
With Alberta’s freeze-thaw cycles, asphalt shingles usually need replacing at around 15 years, and cedar shake can last a bit longer. Good venting helps a new roof reach the end of its warranty.
- Exhaust sized to the roof
- Soffit intake opened
- New flashing on every vent
- Bath fans vented outside
Vent types we install
The right vent depends on your roof shape and how much ridge you have.
Box and ridge vents
Passive exhaust at or near the peak, matched to the shingle.
Eavestroughs, soffit and fascia
New eavestroughs, vented soffit and aluminum fascia, done while the roof edge is open.
Every roof type we install
Architectural, designer and Class 4 shingles, standing-seam steel, cedar shake and Euroshield rubber.
Siding to match
James Hardie fibre cement, vinyl and steel siding, quoted with the roof when you want both.
Ventilation questions
Seeing frost or damp spots? Call (403) 333-0319.
Can you add vents without a new roof?
Yes, but it is simplest to fix while the roof is open during replacement.
How do I know my venting is poor?
Frost on nails in winter, damp insulation, a musty smell, or upstairs rooms that stay very hot in summer are common signs.
Is a ridge vent better than box vents?
It depends on the roof. A long ridge suits a ridge vent. Hip roofs with short ridges often need box vents.
Does venting affect my shingle warranty?
Yes. Most manufacturers require proper ventilation for the full warranty.
Planning a new roof?
Send us a few details and we will check the venting when we measure.