Ice Dam Remediation and Attic Ventilation Upgrade
Attic ventilation and insulation upgrades that addressed the root cause, not just the symptoms.
The Challenge
A homeowner in Vaughan had dealt with thick ice dams forming along the eaves for several winters in a row, along with icicles hanging off the gutters and a water stain appearing on an upstairs ceiling. Previous attempts to chip away the ice each winter hadn't solved the underlying issue.
Uneven Roof Heat Loss
Warm air escaping from the living space into the attic was melting snow on the upper roof, which then refroze at the colder eaves, building up the dam over the course of the winter.
Insufficient Attic Ventilation
The attic had limited soffit intake and no continuous ridge exhaust, so it couldn't stay cold enough in winter to prevent the melt-refreeze cycle driving the ice dams.
Water Backing Up Under Shingles
The ice dam was forcing meltwater to back up under the shingles at the eaves, which had already caused a small leak into the ceiling below.
How We Did It
Because ice dams are usually a ventilation and insulation problem as much as a roofing one, our approach addressed both the roof surface and the attic conditions causing them.
- 1
Attic Inspection
We checked the attic for existing insulation depth, air leaks from the living space, and the condition of the soffit and roof venting.
- 2
Air Sealing and Insulation Top-Up
Gaps around light fixtures, the attic hatch, and plumbing stacks were sealed, and insulation was topped up to reduce the amount of heat reaching the underside of the roof deck.
- 3
Ventilation Correction
We cleared blocked soffit vents and added continuous ridge venting to establish proper intake-to-exhaust airflow through the attic space.
- 4
Eave Membrane Upgrade
During the affected section's shingle repair, we extended ice and water shield membrane further up the eaves to give an added layer of protection against future backup.
- 5
Spring Follow-Up Check
We scheduled a follow-up review to confirm the attic was maintaining a more consistent, colder temperature through the remainder of the winter season.
The Result
By treating the attic conditions rather than just removing ice each winter, the Vaughan homeowner now has a roof system built to prevent ice dams from reforming.
Balanced Attic Ventilation
The added ridge and soffit venting now allows continuous airflow, helping keep the attic closer to outdoor temperature and reducing uneven snowmelt on the roof.
Reduced Heat Loss
Air sealing and additional insulation cut down on warm air escaping into the attic, tackling the root cause rather than just the ice itself.
Extra Eave Protection
The extended ice and water shield membrane gives an added safeguard even in the event of a heavy snow year.
Common Questions About Ice Dams
What actually causes ice dams?
Ice dams form when heat escaping from the living space melts snow on the upper roof, which then refreezes at the colder eaves. Poor attic insulation and ventilation are the most common underlying causes.
Does removing ice each winter fix the problem?
Not on its own. Chipping away ice addresses the symptom for that season, but without correcting attic ventilation and insulation, the same ice dams tend to return in future winters.
Can ice dams cause real damage to a home?
Yes. Backed-up meltwater can work its way under shingles and into the roof deck, leading to leaks, ceiling stains, and even damage to insulation and drywall over time.
How do I get an ice dam assessment for my Vaughan home?
Email us a description of the issue, including how long it's been happening, and we'll arrange an inspection of your roof and attic.
Dealing with Ice Dams on Your Vaughan Home?
Email us your address and we'll take a look at your roof and attic setup.
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