Most January emergency roof calls in the GTA are preventable. Ice dams, snow load failures, and freeze-thaw leaks are the three big winter problems — and they all build up gradually before they fail. A fall pre-winter inspection catches the warning signs in October and November, before the first hard freeze locks the damage in. AUK Roofers offers free drone inspection across the GTA. Book before December and we'll catch the issues that turn into 2 a.m. emergencies.
Ice dams — what they actually are
An ice dam is a ridge of ice that forms at the cold edge of your roof — typically the eave overhang — when warm attic air melts snow on the upper roof, and that meltwater refreezes at the eave. The dam grows over days. Eventually it pushes water back UP under the shingles, where it leaks into the attic, soffits, and ceilings.
Ridge cap condition — wind-loosened or storm-damaged sections
Eavestrough cleanliness — debris that prevents drainage
Downspout flow — ground-level test for blockage
Soffit and fascia — ventilation paths clear, no rot
Attic ventilation — ridge vent and soffit balance
Vulnerable areas — north slopes, valleys, and dormers most prone to ice dam formation
Eavestrough and downspout maintenance
Roughly 90% of ice damming traces to clogged eavestroughs. Leaves, twigs, and asphalt granules accumulate over the year and prevent meltwater from draining freely. Clearing them in late October — after most leaves have dropped — is the single highest-value winter prep action.
Clear all leaves, twigs, and accumulated granules from eavestroughs
Test downspout flow with a hose — should drain freely
Verify downspout extensions direct water 4+ feet from foundation
Consider gutter guards on tree-canopied properties — they reduce annual maintenance significantly
Snow load — when to act
GTA roofs are designed for normal snow loads. Heavy accumulation events — single storms dropping 40+ cm or sustained accumulation over weeks — can stress structurally vulnerable roofs. Most homeowners don't need to worry. Specific scenarios that do warrant attention:
Flat or low-slope roofs (rear additions, garages, sheds): clear when accumulation exceeds 30 cm
Older homes with known structural concerns: clear when accumulation exceeds 50 cm on main slopes
Roofs that have been recently inspected and flagged for ventilation issues
Any roof showing visible sag, creaking, or interior cracks
Always use a proper roof rake from the ground — never climb a snow-loaded roof
Attic insulation and ventilation upgrades
If you've had ice dam problems in past winters, the upstream cause is usually attic insulation and ventilation imbalance. AUK Roofers offers blown-in attic insulation (typically R-50 / R-60 in the GTA) plus ventilation upgrades — soffit baffles, ridge venting, and attic fans where needed. Properly insulated and ventilated attics drop the heat-loss that creates ice dams in the first place.
Current GTA recommendation: R-50 to R-60 attic insulation
Existing R-30 / R-40 insulation is below modern best practice — upgrades pay back in 5–8 years through heating savings alone
Insulation upgrades often qualify for federal/provincial energy rebates
Winter emergency response
If a leak develops mid-winter, call (437) 887-2805 immediately. We respond same-day across the GTA for active leaks. Steps to take in the meantime:
Move belongings out of the leak zone
Place a bucket under active drips
Pierce a bulging ceiling in the centre with a screwdriver to release water in a controlled stream
Take photos for your insurance claim
Do NOT climb on a snow-covered roof — extreme slip hazard
Do NOT chip at ice dams with sharp tools — you'll damage shingles and create more leak paths
Common questions.
Direct answers, no filler.
When should I book my pre-winter inspection?
Mid-October to mid-November is ideal. Earlier and you'll miss late-fall debris. Later and we may not be able to schedule before first hard freeze. Free drone inspection across the GTA — book online or call (437) 887-2805.
Should I clear snow off my roof myself?
Use a long-handled roof rake from the ground if accumulation exceeds 30–40 cm on shallow slopes. Never climb a snow-covered roof — slip hazards are extreme and most injuries from amateur snow removal happen here.
Are heated cables a good ice dam solution?
They're a band-aid, not a fix. Heated cables along the eave can prevent ice dam formation but they consume electricity continuously through winter. The right fix is attic insulation and ventilation upgrades that eliminate the heat-loss that creates ice dams in the first place.
What does emergency ice dam removal cost?
Steam removal (the safe method): $400–$1,200 depending on dam size and access. Mechanical removal voids most shingle warranties — we don't do it. Tarp-and-secure if water is actively entering the home: $400–$650 emergency response.
Will my insurance cover ice dam damage?
Usually yes if the ice formed during a covered weather event and the damage was sudden. Gradual water staining from chronic ice damming over multiple winters is sometimes denied as 'lack of maintenance.' Documentation helps — annual fall inspections demonstrate maintenance.
Can you install ice-and-water shield as a retrofit?
Not without removing the affected shingles. Retrofit ice-and-water shield typically gets installed during a partial slope replacement after ice dam damage. Best installed during initial roofing — we extend it minimum 24" inside the warm wall on every job.
How much does attic insulation upgrade cost?
Blown-in cellulose to bring R-30 up to R-60: typically $1,800–$3,500 depending on attic size. Often qualifies for energy rebates that reduce out-of-pocket by 30–50%. Pays back in heating savings within 5–8 years independent of ice dam prevention benefits.
What if my roof is already past its lifespan and winter is coming?
Honest answer: a fall inspection determines if you can safely make it through one more winter or if you need urgent replacement before December. We'll tell you straight — sometimes a $400 patch buys 6 more months while you plan; sometimes the right call is to replace immediately.
Book my fall inspection (free)
Across all 14 GTA service areas. $2M insured. WSIB. 25-year workmanship guarantee.
