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As a rule, the only time we really want mold in our lives is when we order blue cheese dressing. But unfortunately, we’re sometimes met with the unfortunate reality of finding mold in our homes — including in and around our chimneys.

These molds may seem harmless, but they can cause major distress in your home if left alone.

These molds may seem harmless, but they can cause major distress in your home if left alone.

Clients sometimes notice mold problems in the walls or ceilings around the chimney; sometimes A to Z technicians discover mold issues during a chimney sweeping or chimney inspection. However it’s found, one thing is always the same: It needs to be dealt with as quickly as possible.

Rules Of Thumb For Dealing With Mold

If you notice mold growth around your chimney, take care not to touch it with your bare hands, and do your best not to breathe around it without a mask protecting you. Certain molds have toxic spores that can cause respiratory problems and other kinds of illness, so mold remediation is best left to the pros.

Truly clearing up a mold issue related to your chimney, however, means finding the source of the moisture that’s leading to the mold problem to begin with. If the mold is around your chimney, odds are your mold is the result of a chimney leak, and A to Z technicians specialize in leak troubleshooting.

What’s Causing Your Water Problem?

Chimney systems are designed to hold up well against the constant onslaught of sun, rain and snow, but certain parts of the system are prone to getting beat up by the weather. The only way to know for sure what’s leading to your water intrusion is for A to Z techs to thoroughly inspect your system. But a few common culprits:

Damaged Or Missing Chimney Cap

Without a functioning chimney cap, your flue opening is just that: wide open. And that means moisture can get right into your flue, potentially damaging your flue liner and seeping through to the masonry and building materials beyond, leading to moist drywall, and mold.

Cracked Chimney Crown

A chimney crown is designed and installed to route water away from your flue opening and chimney, but if the effects of heat, cold and moisture cause it to crack, that gives water easy access to your chimney’s interior, and your home’s interior.

Torn/Missing Flashing

The only thing keeping water from getting in where your chimney meets the roofline is flashing — so if flashing gets torn or torn off in bad weather, water can make its way right in there.

Masonry Damage

Bricks and mortar are durable, but if you have an older chimney, there’s a good chance your masonry is beginning to degrade. Intact masonry absorbs a small amount of water, but degraded masonry absorbs far more — almost sucking it in like a sponge. That can quickly lead to moisture damage inside the home, and mold growth. Properly repairing damaged masonry depends on the specific damage — we might recommend tuckpointing receded mortar joints, or with spalling bricks, we might need to replace them. We highly recommend having us apply a waterproofing sealant to masonry chimneys — that can make a big difference in halting leaks, and halting mold growth.

If you have a mold problem around your chimney, don’t stress — A to Z is here to help. Give us a call, and we’ll set you up with our experienced, CSIA-certified technicians!