It’s summertime and that means thunderstorms and the potential for heavy rain. Your roof protects your home and company building from water intrusion but if it’s not doing its job, you may be vulnerable to costly damages. Here are some indicators that you may have a leak in your roof.


If you see drips coming from the ceiling, moisture on the walls, or wet spots, there’s a good chance that you have a leak in your roof. Even if that leak seems to go away after the rain stops, it continues to wreak havoc underneath, so it’s crucial to get it checked out by a professional.

Algae, mold, stains and rot

Even if you don’t have a drip coming from the ceiling, the presence of water stains, rotted wood, discolored felt paper, black marks, or mold may indicate potential problems. Look at your roof, ceilings, roof line, and walls and head into the attic to see if there are visible signs that water is entering your home.


Go into your attic on a cold night and look underneath your roof for a shiner. A shiner is a nail that missed the framing member when the roof sheathing was being nailed to the rafters. Moisture that leaks into the cold attic often condenses on nails. On a cold night, the nails will look white because they’re frosted. When the attic warms during the day, the frost melts and drips, until it frosts again at night.

Missing or damaged shingles

Buckling, curling or missing shingles is a sign that your roof may be compromised. A roof that is patchy is not protected from leaks and is more prone to leaks over time. Whether the flawed shingles are caused by improperly applied felt, movement in the deck of the roof, improper shingle fastening or high winds and storms, it’s a good sign that you might be getting water inside.

Damaged flashing

Seams or roof penetrations such as roof vents, chimneys, dormers, skylights or anything else that projects through the roof are easy ways for water to enter your home. Flashing is a material that helps protect water from seeping inside your business or house. If flashing is loose or deteriorating due to weather, you might already have a leak or will have one in the near future.

Ice dam

An ice dam appears when water from melted snow freezes at your roofline preventing proper water drainage from the roof. The ice dam can cause water to back up under your shingles which could cause leaks.

Mossy or moldy exterior wall

Downspouts and gutters move water away from your roof and down to the ground. When one is leaking or damaged, you may see signs of erosion below the gutters and signs of moisture on the sides of your building exterior. Repairing your gutters might be all that you need to do to fix the problem.

The roof over your business or home can be letting water inside, whether you notice a warning sign or not. If you think that your roof is leaking or that it’s damaged and could cause leakage, it would be best to talk to a roofing professional to ensure that the interior stays dry!