How Winnipeg Weather Affects Your Roof

Don Fata
Sales Manager – Pristine Roofing

What Every Homeowner Needs to Know

If you live in Winnipeg, your roof isn’t just a feature, it’s a first line of defense. With our wildly unpredictable weather, your roofing system needs to handle blazing summer heat, -40°C winters, hailstorms, ice dams, and massive snow loads.

Here’s how our local climate really impacts your roof and what you can do to protect your home.

1. Freeze-Thaw Cycles & Ice Dams   

From late fall through early spring, Winnipeg gets constant freeze-thaw conditions. That means:

  • Snow melts on your roof during the day
  • Water refreezes at night
  • Ice builds up at the roof edge (aka ice damming)
  • Water backs up under shingles and leaks into the attic or walls

Prevention:

  • Install ice & water shield underlayment
  • Make sure your attic is well-ventilated and properly insulated
  • Use drip edge flashing and proper eavestrough systems

2. Hailstorms & Wind Damage

Winnipeg is one of Canada’s top hail zones. Hail and strong winds can:

  • Crack or break shingles
  • Knock granules off asphalt
  • Loosen flashing
  • Tear off ridge vents or soffits

What to Watch For:

  • Bald spots or granules in gutters
  • Dented vents or flashing
  • Shingle corners lifted or missing

Even small hail can reduce roof lifespan.  An inspection after every major storm is a smart move to ensuring you know the health of your roof and avoid bigger problems down the road.

3. UV Exposure & Summer Heat

Our summers bring more than just heat. UV rays break down roofing materials over time, especially cheaper shingles.

Result:

  • Curling, cracking, or brittle shingles
  • Faded color
  • Compromised waterproofing

Metal and rubber roofs resist this much better than standard asphalt roofing.

4. Heavy Snow Loads

Winnipeg winters can dump massive amounts of snow. A few inches may not seem like much, but wet snow can weigh up to 20 lbs per square foot, stressing your structure and trapping moisture on the roof deck.

Risks:

  • Sagging roof lines
  • Ice damming
  • Roof leaks
  • Eave separation or fascia rot

Regular snow clearing and proper attic insulation go a long way to avoiding costly roof repairs.

5. Spring & Fall Rainstorms

We get some serious downpours in Manitoba, especially in spring during the melt. If your gutters or eavestroughs are clogged or poorly pitched, you’re risking:

  • Water pooling around your foundation
  • Erosion of landscaping
  • Water backing up under shingles

Gutter guards, proper roof pitch, and sealed flashing are critical.

How Pristine Builds for Winnipeg Weather

At Pristine Roofing & Siding, we don’t just install roofs, we engineer them for Manitoba conditions:

  • Ice & water shield installed in key leak zones
  • Hail-resistant shingles or rubber options
  • Metal flashing that holds up in extreme temps
  • Eavestroughs and fascia systems that drain right – not just look good
  • Full inspections and storm response from our in-house roofers, never a random subcontractor.

Stay One Step Ahead of the Weather

Your roof doesn’t get a break – and neither do we. Call Pristine for:

  • Storm damage inspections
  • Pre-winter prep
  • Spring thaw leak checks
  • Full replacements and upgrades

We’ll help you build a roof that’s ready for whatever Winnipeg throws at it.