9 Warning Signs of Roof Leaks

Your roof may be telling you something. There are various reasons why roofs leak. Here are 9 warning signs that present reasons for concern during the life of a roof.

There are also many less obvious items which allow water intrusion which are frequently missed. Small roof leaks cause rotten wood and even mold and mildew just like large leaks do. However, small leaks are frequently not discovered, by the untrained eye, until they are large enough to become obvious. By then complete roof replacement is frequently necessary.

The best way to be certain your roof is in tip-top shape is to have it regularly inspected by an experienced roofing professional.

Warning Sign #1: Algae and Mold

  • Occurs most often in warm, humid climates such as the southeast United States
  • Caused by growth of airborne fungi or algae deposited on roof
  • May not impact overall life of the shingle, but could indicate potential problems
Warning Sign #2: Buckling Shingles

  • May be caused by improperly applied felt
  • May be caused by movement in the deck of the roof
Warning Sign #3: Curling Shingles

  • May be caused by water absorption
  • May be caused by hot air in the attic
  • Does not effectively protect the roof from leaks
Warning Sign #4: Damaged Flashing

  • Caused by improper installation (on new roof)
  • Caused by drying and cracking (on old roof)
  • Can sometimes be repaired without replacing roof
Warning Sign #5: Granule Loss

  • Normally a certain number of granules will be loose, especially after application
  • On aging shingles, indicates need for replacement
Warning Sign #6: Lack Of Attic Ventilation

  • Results in trapped hot air in the attic
  • Forces air conditioner to work harder (and possibly break down)
  • Bakes the roof’s shingles
Warning Sign #7: Missing Shingles

  • Caused by storms and high wind speeds
  • Usually related to improper fastening of the shingles
Warning Sign #8: Roof Rot

  • Caused by absorption of of moisture in the mat
  • More common with organic-based shingles
Warning Sign #9: Ceiling or Roof Spots

  • When water gets through, you may see water stains in your ceiling
  • Leaks may appear around chimneys and vents
  • Leaks may even ‘travel’ down rafters and show up away from the original source
Call Sonshine Roofing now at 941-377-9933 to learn more about our Roof Care Club and schedule a roof inspection. Our “Roof Health Checkup” inspection will show you any flaws caused by unforeseen events, faulty workmanship, or defective materials, your roof may have. And if your roof has no problems we will gladly give you clean bill of roof health. A small investment for an inspection can save you thousands of dollars later and provide you peace of mind knowing you have been proactive to insure that your roof can protect and keep you, your love ones and possessions, safe and dry inside your home.



  1. Algae and roof rot are the grossest ones. They make your roof look really trashy, it’s sad.

  2. It’s important to know that hail does not have to be large in order to damage your roof. If a hail storm is also accompanied by high winds, then hail as small as a pea can damage your roof. It’s almost impossible to identify hail or storm damage from the ground. The best way is to have a professional from a roofing company physically inspect the roof.

  3. You are absolute right about small hail damaging roofs. Here in Florida we do not have the hail problem but other small items such as flying debris and tree branches have can also damage the roof. Tree branches do not even have to be big enough to be viable from the ground. That why, like you said, have a roofing professional inspect the roof. We recommend at least one time per year.

  4. I know some of these signs are kind of more obvious than others, but some really surprised me as I wouldn’t have thought to notice them. In particular, shedding granules wasn’t something that I would have thought would have been a sign. So this is good to know. I haven’t had my roof inspected in a long time, so I should probably take the advice of the other commenters and get on that.

  5. I grew up around construction and have personally been in the roofing business since 1974. It was not until recently that I become aware of the value of having the roof checked at least once per year. With regular roof checkup and by maintaining it, you can extend the roof’s useful service life.

  6. Good job. I like the details and pictures for the warning signs of leaky roofs. I can’t tell you how many roofs I’ve been up on that look like some of these pictures! It’s great that your helping your customers realize what to look for.

  7. Thanks Doug Oliver Development. Your right these pictures do help identify problems to look for. And there are still so many other small leaks that are not easy to see except to an experienced eye.

  8. These are definitely signs that there is a problem with your roof. If you see any of these signs, get an expert out as soon as you can to assess the situation and fix what needs to be fix. This can help prevent much bigger problems that may occur down the line.


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