Why Water Is One of the Biggest Threats to Your Chimney
When homeowners think about chimney damage, fire and heat usually come to mind. But one of the biggest threats to a masonry chimney is actually something much more common in Oregon: water.
Brick, stone, and mortar are durable, but they’re also porous. Over years of exposure to rain and moisture, water can penetrate the masonry and begin causing deterioration that isn’t always obvious at first.
How Water Damages Masonry
Once moisture gets into brick and mortar, it can contribute to cracking, crumbling mortar joints, staining, and spalling—the flaking or breaking away of the brick surface.
Small cracks can also grow over time as more water finds its way into the masonry.
The result? A chimney that once needed relatively minor maintenance can eventually require extensive repairs or even rebuilding.
Where Does the Water Get In?
Some of the most common trouble spots include:
- Cracked or deteriorated chimney crowns
- Missing or damaged mortar joints
- Cracked or spalling bricks
- Failing flashing around the roofline
- Missing or improperly fitted chimney caps
Any opening that allows water into the chimney deserves attention.
Can You Waterproof a Chimney?
Yes—but the right product matters.
Masonry should typically be treated with a breathable water-repellent product designed for masonry rather than a coating that completely traps moisture inside.
This helps reduce water absorption while still allowing moisture vapor within the masonry to escape.
Prevention Costs Less Than Restoration
One of the best things you can do for an aging chimney is address moisture problems early.
A professional chimney inspection can identify deteriorating mortar, crown problems, flashing issues, and other potential water-entry points before they become major repairs.
With Oregon's wet climate, keeping water out is one of the best ways to extend the life of your chimney.
Contact Us
Tualatin, Oregon 97062
(503)713-7777
integritycahs@gmail.com
Oregon CCB#: 250379
Licensed, Bonded and Insured
Serving Tualatin Oregon and communities west of the Cascades
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