Leaks & Service Repairs

757-399-3066 ext 3 (Leaks & Service Repairs)

Reroof Estimates & Inspections

757-399-3066 ext 1 (Reroof Estimates & Inspections)

Category: Roof Flashing

Don’t Blame the Roof: Why Your Chimney May be the Cause of a Leak

Roof leaks are a homeowner’s nightmare, leading to potential damage, mold growth, and costly repairs. 

While many people associate roof leaks with damaged shingles or flashing, one often overlooked culprit is the chimney. Chimneys can be a source of significant water damage if not properly maintained. But how do you know whether your leak is coming from your roof or your chimney?

How Your Chimney Can Cause a Roof Leak:

  • Cracked or deteriorated chimney crown: The chimney crown is the concrete or cement layer at the top of the chimney. Over time, exposure to harsh weather conditions can cause it to crack or deteriorate, allowing water to seep into the masonry and eventually into the roof.
  • Damaged or missing chimney flashing: Flashing is the metal strip that seals the intersection between the chimney and the roof. If the flashing becomes damaged, improperly installed, or starts to deteriorate, it can create a pathway for water to enter the roof system.
  • Crumbling mortar joints: The mortar that holds the bricks or stones of the chimney together can deteriorate over time due to weathering. As the mortar crumbles, gaps and openings can form, permitting water infiltration into the roof.

How to Detect a Chimney-Related Roof Leak:

  • Internal signs: Look for water stains, peeling paint, or discoloration on ceilings or walls near the chimney. These are often indicators of a leak. Mold growth or musty odors may also be present.
  • Exterior signs: Inspect the chimney for cracks, crumbling masonry, or missing flashing. Pay attention to any signs of water pooling on the roof or around the chimney after a heavy rainfall.
  • Attic inspection: Check your attic for signs of water damage, such as damp insulation, water stains, or rotting wood near the chimney.

Taking Steps to Repair the Damage:

  • Consult a professional: If you suspect your chimney is causing a roof leak, it is crucial to contact a qualified roofing professional and/or chimney specialist. Depending on the damage you may need both specialists to come in and do repairs – especially if a chimney leak has caused damage to nearby areas of your roof.
  • Chimney crown repair: If the chimney crown is cracked or deteriorated, it should be repaired or replaced. A chimney professional can apply a waterproof sealant or construct a new crown to prevent water penetration.
  • Flashing replacement: Damaged or missing flashing should be replaced with new, properly installed flashing. This will ensure a secure seal between the chimney and the roof. A qualified roofing contractor can do this repair and in some cases a chimney repair company can as well.
  • Mortar joint repair: If the mortar joints are deteriorating, a process called tuckpointing can be performed. This involves removing the damaged mortar and replacing it with new mortar to restore the chimney’s integrity. This should only be done by an experienced chimney and masonry expert.
  • Regular maintenance: To prevent future leaks, schedule regular chimney inspections and maintenance. Keep the chimney free of debris, ensure proper ventilation, and consider applying a waterproofing sealant to protect against moisture.

While chimneys provide warmth and charm to our homes, they can also become a pesky source of roof leaks if neglected. Just like other functional and structural aspects of your home, pay attention to your chimney and visually inspect it regularly. If you think it may be causing any leaks or issues, contact a professional as soon as possible before further damage is done. By addressing chimney-related issues promptly, you can protect your home and preserve its structural integrity for years to come.

Andrews Roofing has been providing homeowners in Hampton Roads with sound roofing repair advice and services for over 25 years. If you’re not sure if your leak is coming from roof or chimney damage, contact us today. Our experts can provide an on-site inspection to help identify the issues and make a plan for repairs – whether we do them ourselves or refer you to a local chimney specialist.

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Why Good Flashing Is Critical for Your Roof

When we talk about roofing repairs and replacements, people typically just think about shingles or other types of exterior roofing materials like metal, cedar shake or clay tile.

But there are many critical pieces that go into a good, solid roofing system, and one of them is flashing. Flashing is more important than people think, and improperly installed, damaged or missing flashing is one of the most common causes of roof leaks.

What is flashing?
When a roof plane meets a vertical surface, shingles and other roofing materials can’t be used to protect those parts of the roof. Instead, flashing is installed around vertical roof features to direct water away from these critical areas. Roof flashing is a thin metal material that comes in large sheets and is cut, molded and layered to fit where it is needed. It may also be made out of a plastic membrane for some applications or you may see PVC used at penetrations as pipe collars, sleeves and other fittings that function as flashing.

How does flashing work?
Without flashing, water could penetrate between the crevice of say, a shingle and a chimney. Flashing ensures that the water runs back over the roofing material, down the roof plane and off the house, hopefully into a clear and clean gutter. Other areas where flashing may be used includes vents, skylights, dormers, and sometimes even between the edge of the roofline and a gutter system.

What is flashing made of?
The materials used for flashing has changed over the years, from lead-coated materials to safer and more durable types of metals. This includes aluminum, copper and galvanized steel. Depending on the building codes where you live, a roofing contractor may have to use a specific material. While we typically use aluminum flashing on residential installs, the material itself is dependent on the specific roof and situation.

When should I replace or repair flashing?
If your home is experiencing a leak, and it does not appear to be from missing shingles, punctures or other damage, it may be time to check the flashing. Check the areas we discussed above to see if any of these issues have occurred:

  • Holes, dents or bending
  • Corrosion or rusting
  • Missing nails or loose nails
  • Loose or missing flashing

If you spot any of these issues, it’s time to call in a qualified roofing professional. Replacing flashing yourself is dangerous and if done incorrectly, can cause even more damage to your roof and ultimately the interior of your home.

When having your roof replaced, it’s a good idea to have the flashing replaced at the same time. Some areas may be able to be reused, but to ensure a watertight seal and a lifespan equivalent to your new roof material, full replacement is likely worth the minimal extra investment. Your existing roof flashing materials may also not be up to current code, in which case a roofing contractor will be obligated to replace it. Alternatively, it’s very possible that when you are experiencing a leak caused by flashing that only the flashing will need to be replaced, and that a full roof replacement is not necessary.

If you are having issues with your roof’s flashing, or have a leak you haven’t been able to identify the cause of, give Andrews Roofing a Call. We are experienced in the specific issues Hampton Roads homeowners encounter, especially during storm season. Contact us today.

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