Chimneys are left exposed to the elements at all times, which makes them vulnerable to moisture and leakage. Let’s take a look at the signs of a roof leaking around the chimney and what you can do to prevent this issue.
Signs Of A Leaking Chimney
Accessing the chimney to inspect it for leakage can be quite challenging. However, if you are simply aware of the warning signs listed below, you’ll be able to detect a roof leak near the chimney. This can help to prevent any extensive damage.
Here are a few obvious signs of chimney leaks:
- Condensation or moisture inside the fireplace.
- A dripping noise that can be heard near the fireplace.
- The smell of mold near the fireplace, especially after heavy rainfall.
- White stains found on the chimney bricks.
- Water stains seen on the walls or ceiling close to the fireplace.
Any of these warning signs warrant a closer inspection of the roof and chimney liner to accurately assess the leak.
What Causes Roof Leaks Around The Chimney?
Chimneys can leak for a variety of reasons. For instance, rain can fall straight into masonry chimneys that do not feature covers. The chimney crown could also have a crack, which resulted from freeze and thaw cycles, ultimately allowing some moisture to seep through.
The most common cause of a roof leak around the chimney is flashing problems. Flashing is a waterproof material that installers put between the chimney and roofing materials to seal the area.
Typical flashing issues include the following:
- Improper type of flashing installed.
- Failure to maintain the flashing.
- Waiting too long to replace the flashing.
In the majority of cases, a chimney leak repair will involve a replacement of the flashing around the chimney structure.
How To Prevent Roof Leaks Around The Chimney
The first step toward preventing leaks is choosing to install the correct flashing. Several areas of your roof require flashing to prevent leaks, including the wall sides and valleys. There are different types of flashing to choose from so it’s crucial to select the proper type for your chimney.
Here are a few common types of flashing:
- Step flashing features multiple metal pieces with a 90-degree bend in the center.
- Continuous flashing is a long piece of metal that directs water flow down to the gutters.
- Counter or base flashing can move as the roof contracts and expands.
The best flashing for chimneys is step flashing. Homeowners typically learn that leaking can be the result of contractors replacing only roofing materials and not the flashing.
Maintain The Flashing
The flashing around your chimney should have the same lifespan as your roof when cared for properly. Maintaining your roof flashing can help to prevent deterioration and leaks.
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