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The Top 7 Indicators That Your Chimney Flashing Needs Repair

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Chimney flashing is a vital component of your roofing system, as it protects the junction between the chimney and the roof from water penetration. It is typically made of metal, such as aluminum or galvanized steel, and is designed to divert water away from the chimney and roof. Over time, however, chimney flashing may deteriorate, become damaged, or simply fail to perform its intended function.

In this article, we will discuss the top seven indicators that your chimney flashing needs repair, so you can address the issue before it becomes a major problem.

1. Visible Signs of Damage

The most obvious sign that your chimney flashing needs repair is visible damage. This can include rust, corrosion, cracks, or holes in the material. While some minor surface rust can be removed and treated, more severe damage will require professional repair or replacement. If you notice any signs of damage on your flashing, it’s essential to address the issue promptly to prevent further damage to your home.

2. Leaks in the Attic or Ceiling

One of the primary functions of chimney flashing is to prevent water from entering your home. If you notice water stains on your attic ceiling or walls, or if you have water dripping from the ceiling near your chimney, it’s a good indication that your flashing might be damaged. Don’t ignore these warning signs – water damage can lead to mold, rot, and structural issues if left unaddressed.

3. Damaged or Missing Shingles Around the Chimney

If you notice that shingles around your chimney are damaged, buckling, or missing, it could be a sign that your flashing is not doing its job correctly. Water may be seeping beneath the shingles, leading to deterioration and potential leaks. While you may be able to replace a few damaged shingles, it’s essential to inspect the flashing and address any underlying issues.

4. Deteriorating Mortar or Bricks

Water infiltration can also cause damage to the mortar and bricks of your chimney. If you notice that the mortar between the bricks is crumbling, or if bricks are cracked or loose, it could be a sign that your flashing is damaged and allowing water to penetrate the chimney structure. Repairing the mortar and bricks is necessary, but it’s equally important to address the root cause of the issue–the flashing.

5. Interior Water Damage Near the Chimney

In addition to attic leaks, you may notice water damage inside your home near the chimney. This could manifest as discolored or peeling paint, warped or stained walls or ceilings, or even mold growth. While these issues may have multiple causes, damaged or ineffective chimney flashing is a common culprit. Calling in a professional for a thorough inspection and repair is essential to prevent further damage.

6. Sagging or Separating Flashing

Properly installed flashing should be tight and snug against the chimney and roof. If you notice that your flashing is sagging or pulling away from the chimney, it may not be providing an effective seal against water infiltration. This issue can often be resolved by resealing or replacing the damaged flashing.

7. Aged or Outdated Flashing Materials

Flashing materials have come a long way in recent years, with modern options offering increased durability and longevity. If your flashing is old or made from outdated materials, it may be more prone to corrosion, rust, and deterioration. If you’re unsure how old your flashing is or what material it’s made from, it’s a good idea to have a professional assess its condition and recommend any necessary repairs or replacements.


Chimney flashing is a vital component of your home’s protection against water damage, and it’s essential to keep it in good repair. If you notice any of these seven indicators, it’s time to call in a professional to assess the situation and provide the necessary repairs. By staying vigilant and addressing any of the above signs of damage or deterioration promptly, you can maintain the integrity of your home and prevent costly repairs down the line.

Are you in need of a roof chimney flashing repair? Then look no further than J. Carnes & Son Roofing! We are the most trusted and leading roofing contractors in Southern Maine and New Hampshire. Whether you need a minor roof repair or a complete roof replacement, we have got you covered. Don’t let a damaged chimney flashing cause further damage to your roof. Let us be your go-to roofing contractor for all your roofing needs! Contact us today to get started!