Chimney damage often goes unnoticed for a long time until a heavy downpour causes leaks indoors. Ensuring a watertight chimney is a part of proper roof maintenance, but it’s well worth knowing what causes leaks in the first place. Here’s a closer look at several components that can lead to water damage.

Why Do Chimneys Leak?

1. Damaged Flashing

The sheet of aluminum, steel, or copper that covers the gap between the roof and chimney is called flashing. Its purpose is to prevent water intrusion in this area. Flashing can be compromised due to wear and tear from the elements, improper installation, or a lack of timely roof maintenance. If water is seeping past the flashing, you’ll need a contractor to repair or replace the metal.

2. Damaged Roofing Material

If you’ve skipped roof maintenance for years, don’t be surprised to find damaged roofing materials. Worn-down or damaged shingles around the chimney may be the reason for a leaky chimney. Instead of sealing the surface to keep out water, consider replacing the worn materials.

3. Damaged Masonry

Over time, exposure to the elements may cause your chimney masonry to crack or crumble. Holes and fissures tend to develop along the chimney's mortar joints, allowing water to seep in and cause leaks. A roofing professional will repoint all joints with new mortar or replace masonry if there’s extensive damage.

4. Faulty Chimney Crown or Mud Cap

The crown or mud cap is the mortared top of some chimneys that protects the structure against water damage. However, a mortar crown tends to crack from extreme temperature changes and weathering, letting moisture penetrate the chimney underneath it.

5. Condensation From the Furnace

Sometimes, what you thought of as a chimney leak might be condensation from your furnace. When warm air cools as it enters the chimney, some of it condenses, corroding the mortar joints from the inside. This can weaken your chimney’s masonry and create gaps in the joints.  

 

Some of the reasons behind chimney leaks stem from issues with your roofing. You can address problems early on if you opt for regular roof maintenance with Price & Son’s Roofing Co. Located in Kernersville, NC, they provide top-notch roof repairs, installations, chimney flashing replacement, and other services to homes and businesses throughout the Triad area, earning an A+ rating from the Better Business Bureau®. Call (336) 869-6921 to schedule an appointment or visit the website to learn more about their services.