Roof Snow Removal in Airdrie

Which Airdrie roofs actually need snow removal

Homes and buildings in Airdrie are designed for local snow loads under the Alberta Building Code. On most pitched shingle roofs, a normal winter’s snow is well within what the roof was built to carry, and the wind strips a lot of it off anyway. Paying someone to shovel a sound, steep roof after every storm isn’t necessary.

The roofs that need attention are the ones where snow can build up instead of blowing or sliding off:

• Flat and low-slope roofs — on detached garages, rear additions, covered decks and many commercial buildings
• Step-downs, where a single-storey garage or bonus room sits below a two-storey wall and catches snow blown off the higher roof
• Valleys and areas behind dormers and chimneys, where drifts collect
• Porch and patio roofs with a shallow pitch, often framed more lightly than the main roof
• Older or modified structures — sunrooms, carports and garages that may not have been built to the same standard as the house

Drifting: the Airdrie snow load problem

In Airdrie, the depth of snow on the ground isn’t the full story. The prevailing northwest wind blows across open farmland and the city’s newer edges and moves snow around. It scours the windward side of a roof and dumps the snow on the sheltered side, against the next wall up, or behind a parapet.

That means one part of a roof can carry several times the snow of the rest. We see it most on:

• Garages attached below a two-storey wall in communities like Hillcrest and Reunion, where the upper roof sheds onto the lower one
• Commercial roofs with parapets in the city’s business and industrial areas, where drifts build against the walls and around rooftop units
• Rear additions and low-slope sections tucked against the main house

A drift that looks like a small bank from the street can be the heaviest thing on the roof.

Why spring snow is the heavy snow

Airdrie’s biggest snowfalls often arrive late in the season. March and April storms tend to bring wet, heavy snow, and snow that has already sat on a roof through a chinook thaw and a refreeze turns dense and icy. The same depth weighs far more than the dry powder of a January cold snap.

The most dangerous combination is rain or a fast thaw on top of an existing snowpack. The snow soaks up water like a sponge, getting heavier just as it’s about to melt — and on a flat roof with a blocked drain, that meltwater has nowhere to go.

When to remove snow from your roof

Consider snow removal when:

• There’s more than about two feet on a flat or low-slope roof
• The snow is heavy and wet, or has turned icy after thaws
• Wind has built a deep drift against a wall, parapet or step-down
• Ice dams are forming at the roof edge — see ice dam removal
• Drains or scuppers on a flat roof are buried ahead of a thaw

Call right away if you notice sagging in the roofline or ceiling, interior doors that suddenly stick, new cracks in drywall or plaster, creaking or popping sounds from the roof structure, or water coming in. Those are signs the structure is under stress, and waiting for the melt isn’t safe. If water is already inside, see emergency roof repair.

Safety first: roof rake or professional removal

What you can do safely from the ground. A long-handled roof rake with a plastic blade can pull snow off the lower three or four feet of a single-storey roof — the part that feeds ice dams. Work from the side, not directly under the edge, keep well away from power lines and the electrical service mast, and leave an inch or two of snow on the shingles. Don’t try to rake from a ladder.

When to call a professional. Anything above the first storey, any flat or commercial roof, any heavy drift, and any roof showing signs of stress. Working on a roof in winter means proper fall protection — Alberta’s workplace safety rules require it at heights of three metres or more — and knowing where the edges, skylights and drains are under the snow.

How we clear snow from a roof

1. Assess from the ground. We look at the roof shape, drift locations and anything that might be hidden under the snow.
2. Set up fall protection before anyone steps on the roof.
3. Clear the heaviest areas first — drifts and step-downs — so load comes off evenly instead of shifting to one side.
4. Use plastic tools only, working down to a thin layer of snow so no tool touches the shingles or membrane.
5. Open drains and scuppers on flat roofs so meltwater can drain away.
6. Keep the ground safe. Snow is dropped away from doors, walkways, vents and meters.
7. Note what we see. Lifted membrane seams, damaged flashing or early ice dams are photographed and reported.

Snow removal for flat, rubber and commercial roofs

Membrane roofs need a lighter hand than shingles. EPDM, TPO and modified bitumen can be cut by a metal shovel edge, and a small puncture in January becomes a leak in April. On flat roofing and rubber roofing we work around seams and flashings, and on commercial roofing we prioritize drifts at parapets and around rooftop units, plus the drains the spring melt will depend on.

If we find damage while clearing, we’ll tell you and quote it separately — see flat roof repair.

Sliding snow on metal and steep roofs

Metal roofing and steep shingle roofs have the opposite problem: snow doesn’t stay, it lets go all at once. A sheet of snow and ice sliding off a two-storey metal roof can damage a lower roof, a deck railing, a vent or a car — or injure someone on the walkway below. The answer there isn’t shovelling, it’s snow guards installed above entrances, walkways and lower roofs so the snow melts in place or releases gradually. If a new metal roof is sliding snow onto a garage or porch roof, that lower roof is also the one to watch for overloading.

What roof snow removal costs in Airdrie

Price depends on roof size, snow depth and weight, access and how much drifting there is. If winter has already caused damage, see the roof repair cost guide, or the flat roof cost guide for membrane roofs.

Keeping snow problems from coming back

Heavy snow is weather; repeated trouble usually isn’t. Ice dams and fast-melting snow on the lower roof point to heat escaping into the attic, and fixing roof ventilation and air leaks does more over a winter than any amount of shovelling. Flat roofs that pond or drain slowly after the melt need their drains and slope checked. And if a garage or porch roof sags every winter, it’s worth having the structure looked at before it’s loaded again.

We clear roofs across Airdrie — from the garages and additions of Old Town to newer homes in King’s Heights and Cooper’s Crossing — and in Crossfield and Balzac.