Ice dams get blamed on the roof, but a lot of them start in the gutters. A gutter full of leaves and grit holds water instead of moving it, and once that water freezes you're on your way to a dam at the roof edge, water backing up under the shingles, and a leak inside the house. A fall gutter cleaning — done properly, with the repairs most gutters also need — is your first defense against all of it.
How Clogged Gutters Create Ice Dams
- Debris dams the gutter. Leaves and grit slow the water down, so meltwater and fall rain pool in the trough instead of draining.
- The pool freezes. Overnight cold turns standing water into a solid ridge of ice along the eave.
- More water keeps coming. Snow melt from the warmer upper roof runs down and hits the frozen edge — and has nowhere to go.
- Water backs up. It ponds behind the ice and works its way under shingles and into the roof deck.
- The house pays. Leaks in ceilings and walls, soaked insulation, and damaged fascia and gutters from the weight of the ice.
The Fall Cleaning
Scoop the debris out by hand or with a gutter scoop, working toward the downspouts, then flush the run with a hose and watch how it drains — that's where the problems show themselves. Check the downspouts too; a clog at the elbow is common. Work safely: a sturdy ladder on firm, level ground, someone footing it, and no leaning out past the rails to reach "just one more section." Move the ladder instead. If the roofline is high or the pitch is steep, that's a job to hire out.
Slope, Alignment, and Fascia
Gutters only drain if they're sloped to do it: the standard is 1/4 inch of slope per 10 feet toward the downspout. Sagging runs hold water at the low spots, which is why a cleaned gutter can still freeze. Check for sections that have pulled away from the fascia, hangers that have let go, and the condition of the fascia board behind it — soft, rotting fascia won't hold fasteners, and the gutter will sag again no matter how often you tighten it. Downspouts should be spaced so no run is asked to drain more roof than it can handle.
Downspout Extensions
Where the water lands matters as much as getting it off the roof. Downspouts should discharge 4–6 feet from the foundation, through extensions that stay attached and slope away. A downspout that dumps at the base of the wall sends roof water straight at your foundation — feeding basement leaks and frost pressure all winter.
Gutter Guards: The Honest Answer
Guards reduce how often you clean; they don't eliminate it. Fine mesh keeps leaves out but can ice over at the edge in our winters, and cheap covers let grit through that still needs flushing. If your lot has heavy tree cover, quality guards are worth it. If it doesn't, a proper cleaning twice a year does the same job for less money. Either way, guards are not a reason to stop checking slope, seams, and downspouts.
Repair or Replace?
Repair when the troughs are sound and the issues are local: a leaking joint, a few hangers, one sagging run. Replace when you see widespread rust or cracking, seams failing along every run, or fascia so rotten the system can't be mounted solidly. If you're replacing, seamless gutters are the upgrade that matters — one continuous run per side, no joints to leak at the corners of every section.
A few hours on the gutters in fall is cheap insurance against an ice dam in February. Call Concepts Construction at (705) 330-2911 for a free estimate on gutter and roofline work in Barrie and Simcoe County. We're available Monday to Friday, 8:30 AM to 4:30 PM.
