Minnesota’s sub-zero winter temperatures are rough on you, your car and your home—and your home’s roof.

Your roof works to protect you from the elements, but it may need some help from you this winter, too. There are three conditions that happen in the winter, and they can be a triple threat to your roof’s integrity, so be on the lookout for them.


Condensation can take a toll on your roof if that moisture gets trapped there. Water can collect over the year if the roof is not properly sealed and insulated, and when the cold weather comes it can cause cracks and freezes in the structure of the roof. This can threaten the entire roof’s stability and create leaks. If this issue isn’t fixed it will only worsen the condensation problem.

A roof with condensation may have some sort of white or black build up. However, this can be hard to identify, so a professional may be needed to properly inspect your roof. Keeping out moisture in the first place is the best way to prevent condensation from happening. Proper ventilation and repairing holes in the roof can help as well.

Ice Dams

It’s no surprise that snow on a rooftop can cause problems. Ice dams form when a house heats the bottom layers of the roof except for the eaves. The melting water refreezes at the edge of the roof (because the eaves are cold), so water goes under the shingles and freezes. This creates an ice dam at the edge of your roof. Ice dams can damage your shingles, ceilings, and floors. The collection and infiltration of water can also create mold.

Check out some of our other blog posts on ice dams for more information.


Icicles often form on the edge of a roof or gutters, and if they’re small they don’t really indicate a problem. If there are larger icicles, it could be a sign of an ice dam and they can hurt you and your roof. Icicles can become extremely heavy and sharp. This puts your roof, windows, and gutters under stress.

Signs Your Roof is Failing

Here are a few things you should be on the lookout for:

  • Leakage in the attic after rain or ice build-up
  • Excessive energy costs
  • Mold or mildew growth on interior walls
  • Blistering or peeling paint on interior walls
  • Other exterior decay or dirty, dark spots on your roof

We’re a GAF Certified Master Roof Contractor and GAF has a full list of danger signs in greater detail.

We definitely don’t recommend you getting on your roof to inspect. Take a look from the ground and use a pair of binoculars to get a closer look. If you’re really concerned, call a professional out for a free inspection.