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You’re probably no longer a stranger to ice dams. But even though they are a common problem in colder regions, you can still take a few measures to prevent icicles from forming along the margins of your roof.

Century Roofing and Siding, a top-rated roofing contractor in the area, discusses the typical causes of ice dams and how you can prevent them.

What Causes Ice Dams?

Ice dams usually start forming when snow on an upper, warmer part of the roof melts and runs down toward the colder eave overhang. This is where the meltwater freezes and accumulates, blocking newer snowmelt from flowing off the roof.

This blockage causes the ice to back up under the roof shingles, where it melts again and then soaks the roof sheathing. Leaks start to develop in the attic and potentially reach your insulation, ceiling drywall and later on your living spaces.

How Can Ice Dams Be Prevented?

Fortunately, there are multiple ways to prevent ice dams and protect your roofing and your home from costly damage.

Improve attic ventilation – Good attic ventilation can minimize the likelihood of ice dams since it allows cool outside air to circulate in the attic space. This keeps the roof surface below freezing, so it prevents snow from melting on your roof.

Insulate the ceiling in your living spaces – This is also another way of keeping lower temperatures against the roof deck. If you have an open attic, the floor of the attic should be insulated. But if there is a finished ceiling directly against a roof, the rafter spaces would have to be insulated.

Eliminate heat sources – There could be heat sources in your attic that you’re not aware of, so you might want to consider some less obvious culprits. For instance, if there are older recessed lights mounted in your attic floor, these could radiate heat into your attic and cause the air to go above freezing point.

Century Roofing and Siding takes pride in the excellent workmanship and superior customer service that we provide. From roof repair to roof replacement, you can count on us to deliver results that meet or exceed your expectations. Call us at (613) 738-1774 or fill out our contact form to request a free quote. We serve customers in Nepean, ON, and nearby areas.