As the temperatures continue to climb, and we finally get a chance to enjoy some warm weather, we start to walk around the neighborhood, or even our own homes, to find that lots of work needs to be done. Whether it be weed picking or changing bulbs in the light fixtures there’s always something that needs to be done. However, there’s one thing that can’t wait for your attention and that’s chimney tuckpointing. Why is it so important? Let’s take a look.
Weather and Chimney Tuckpointing, Not a Good Match
You might have guessed that Chicago and Chicagoland’s weather is brutal on masonry. The city and suburbs average around 35 freeze-thaw cycles every single winter. Every time the cycle occurs, it takes a toll on the chimney’s mortar joints. When water gets in and temperatures drop, the water freezes & expands as ice with enough force to crack brick and stone. When Spring comes around, what once was a hairline crack, now gets bigger and allows rain to enter into your home.
This is why the yearly chimney inspection is not optional, according to the CSIA (Chimney Safety Institute of America).
A Little Chicago History
Most homes in neighborhoods like Beverly, Oak Park, Evanston and across the North Shore were built between the 1890s and 1950s. The mortar used in that era had a lifespan of roughly 25–30 years under normal conditions. Under Chicago and Chicagoland conditions? It is reduced. Homeowners buying older properties frequently inherit chimneys that haven’t been maintained in a very long time.
When the chimney along with the flashing, bricks, chimney cap and chimney crown are not checked and maintained, loss of structural integrity begins. Water working its way through deteriorated joints reaches the interior of the chimney. This is where it can cause damage to the fire liner while it finds its way into the home. In some situations, compromised masonry near the fireplace can create fire safety concerns.
Getting a Chimney Inspection Early Makes All the Difference
The good news is that chimney tuckpointing, diagnosed early, is simply a repair. The bad news is that homeowners who wait too long can turn the issue into a partial rebuild, or a full chimney rebuild. By the time mortar is visibly crumbling from the street, the damage has already progressed deeper into the chimney structure.
A professional inspection every year is the most cost-effective way to keep the chimney and home heathy. It’s often the difference between a few hundred dollars and several thousand.
Not All Tuckpointing Is Equal
One thing worth understanding is that proper tuckpointing requires removing the old mortar to a depth of approximately three-quarters of an inch before new mortar can be applied. Anything less and the new mortar won’t bond with longevity / correctly. DIY or companies that just smear new mortar over old joints are doing what’s sometimes called “skim coating,” and it’s essentially cosmetic work that won’t hold up.
The type of mortar mix matters too. More modern cement mortars are actually harder than historic brick, which causes the brick itself to absorb, stress and crack rather than the mortar joint. A knowledgeable mason from Superior Chimney will match mortar composition to the brick, only something a real expert can get right.
Contact Superior Chimney today to get a chimney inspection which includes inspecting the exterior chimney today at 877-244-6349.