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Leaning Chimney2026-11-03T09:03:00-06:00

Leaning Chimney Repair: Causes and Permanent Fixes

If your chimney is leaning, tilting or pulling away from your home, the problem often starts beneath it. As the chimney's foundation settles, the masonry moves with it. Rebuilding the chimney without stabilizing the foundation addresses only the symptom. The new chimney can lean again over time if the underlying problem isn't repaired.

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Symptoms

Warning Signs to Watch For

A leaning chimney is about more than appearances. It often signals movement in the foundation supporting it. As the chimney shifts, you may notice gaps where it meets the house, cracked mortar or a noticeable tilt. Left unaddressed, these problems can allow water and pests into your home, loosen bricks and, in some cases, create safety concerns if the chimney flue is damaged.

Chimney Pulling Away from the House
Chimney Tilting Toward the House or Roof
Gap Where the Chimney Meets the House
Cracks Around the Chimney Base or Hearth
Chimney Cap or Flue Out of Alignment
Staircase Cracks in Chimney Brick or Mortar

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Causes

What Causes Chimneys to Lean?

A leaning chimney is generally the result of chimney foundation settlement, where the footing beneath the chimney shifts separately from the home's foundation. Because most masonry chimneys are built on their own footing, they can settle independently of the rest of the home. Determining what's causing that movement is the first step toward choosing the right long-term repair.

  • Foundation Settlement Beneath the Chimney

    A leaning chimney is commonly the result of settlement beneath its foundation. Since many masonry chimneys rest on a separate footing, movement below the chimney can occur even if the rest of the home’s foundation shows no signs of movement.

    Unlike the main foundation, masonry chimneys are usually constructed on their own concrete footing. This footing is generally shallower and surrounded by backfilled soil, which is more prone to settling over time. As the soil beneath the footing compresses or shifts, the chimney begins to tilt independently of the house. That’s why simply repairing the brick or mortar won’t stop the movement: the foundation beneath the chimney must first be stabilized.

  • Unstable or Shifting Soil

    The soil beneath a chimney footing swells, contracts and settles over time. Loosely compacted backfill, varying moisture conditions and unstable soils can all diminish support under the footing, allowing the chimney to shift.

    Many chimney footings are surrounded by backfilled soil that compacts more than undisturbed ground. In regions with expansive clay, the soil expands when wet and contracts when dry, placing repeated stress on the footing. Over time, this movement causes the chimney to move farther away from its original position.

  • Freeze-Thaw Cycles & Water

    Water around the chimney foundation can speed up settlement. Repeated freezing and thawing and seasonal moisture changes weaken the supporting soil, compounding chimney movement over time.

    When water waterlogs the soil beneath a chimney footing, freezing temperatures cause it to expand and push upward. As the ground thaws, the soil drops again. Combined with expansive clay soils common throughout the Midwest, these seasonal cycles can steadily increase chimney settlement and widen the gap between the chimney and the home.

How a Chimney Starts to Tilt

  • Soil Beneath the Chimney Begins to Settle

    The soil supporting the chimney footing begins to compress or move due to poor compaction, fluctuating moisture levels, expansive clay soils or seasonal freeze-thaw cycles. The chimney foundation starts to lose support.

  • The Chimney Starts Pulling Away

    As the footing settles unevenly, the heavy masonry chimney begins to lean. Small gaps appear where the chimney meets the house, and cracks may form in the brick, mortar joints or fireplace hearth.

  • Movement Becomes a Structural Concern

    Without foundation repair, the chimney continues to lean and the gap widens. Water and pests can enter through the gap, loose bricks may become a hazard, and rebuilding the chimney alone won’t resolve the root problem. Most leaning chimneys worsen gradually rather than suddenly, but continued movement can eventually lead to more serious structural concerns.

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Foundation Repair Solutions for a Leaning Chimney

Every leaning chimney is different, but the goal is always the same: stabilize the foundation before fixing the masonry. The right solution depends on how the chimney is built, how much it has moved and what's causing the settlement. After a professional inspection, we'll identify the root cause and recommend a field-proven foundation repair solution designed to stabilize the chimney and help prevent movement down the road.

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  • Helical Piers

  • Push Piers

  • Wall Anchors & Braces (if chimney movement is related to a bowing foundation wall)

  • Carbon Fiber Reinforcement (for associated foundation wall cracks)

  • EverBrace® Wall Restoration System (for severely damaged foundation walls) 

How It Works

How We Repair a Leaning Chimney

Step 1

Inspect Your Chimney

We check the chimney inside and out, watching for signs of settlement like a chimney that leans, gaps between the chimney and the home, damaged brick or crumbling mortar and movement at the fireplace or the base of the chimney.

Step 2

Pinpoint the Cause

We evaluate the chimney footing, surrounding soil, drainage and foundation conditions to determine why the chimney is moving and whether settlement is the underlying cause.

Step 3

Stabilize the Footing

If foundation settlement is causing the problem, we install the appropriate repair solution, typically helical piers or push piers, to stabilize the chimney and help prevent additional movement.

Step 4

Finish the Masonry Repairs

Once the foundation is stabilized, any needed masonry repairs can be completed with confidence. Addressing the underlying settlement first helps ensure cracks, gaps and other cosmetic repairs stand the test of time.

Benefits

Why Homeowners Choose NV Waterproofing and Foundation Repair

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See what our customers have to say about our work.

NV Waterproofing was extremely responsive and 100% committed to identifying our water problem and designing a solution. Their work was excellent. The crew was on time and organized. They were very careful to protect the exterior landscaping and the interior of our home from dirt and debris. Even two years later, they responded to a sump problem at no additional charge. NV Waterproofing does the job right and stands behind its work.

Mike and Lynn F. | Columbia, MD

We bought a house in a state of disrepair, and so we've had to work with a number of contractors. I'd rank this company at the top of the list for their professionalism, knowledge, experience, and honesty. We had bowing of our basement walls that needed to be addressed. Michael came out to assess the situation, and gave us some options. After speaking with him, I felt very confident in their ability to buttress our walls. It was also a huge bonus that we were able to set up a payment plan for this job too. When the team showed up, Casey, Kevin, and Grant, they were super polite and professional. They took great care of our property, and if they had a question about anything, they asked. Also, if I had a question, Casey (the foreman), was very knowledgeable and quick to answer. They presented the work as they progressed through the job, and really, I was actually a little blown away by the scale of the project, and the speed at which they worked. What an impressive job they did! We're very confident in the work they did and will hire them again.

Ellen M.  | Takoma Park, MD

We were referred to NV Waterproofing from my brother-in-law who used them and was pleased. They came out and gave us an estimate - they were very prompt. We had the work done - it looked great and I am sure will do the job (only time will tell). We did have a miscommunication with the work (mostly on our part), but the owner had it fixed promptly and without additional cost. I would highly recommend them to anyone with water issues in their basement.

Susan C. | Washington DC, DC

NV stuck with me and made sure I was happy. Roberto Jr kept me calm as my problem persisted and kept working on a solution beyond the obvious. I highly recommend. Looking forward to a dry basement this summer.

Dean R. | Washington, DC

I am writing this letter to commend members of your organization for the waterproofing work performed on and around the foundation of my house. Despite situations beyond the control of both me and your associate, he always maintained professionalism and demonstrated why he is an outstanding representative of your organization. The crew obviously knew what had to be done and went about doing it. They were prompt in arriving at work each day, diligent in the performance of their duties (in spite of high heat and humidity), and took measures to ensure the safety around the excavated area (important because of children in the neighborhood). Unlike other construction sites I have seen, the crew maintained the area free of litter— no small measure these days! In addition, the crew always provided clear explanations of the work to be done each day, answering the questions with forthright and clear responses, never hurrying the discussion. As I was not on site while work was being done, they called me several times, taking those extra steps to keep me informed of the status of the work and aware of the tasks yet to be performed— something that is greatly appreciated. I would appreciate it if you would offer my heartfelt thanks to your able crew for the quality waterproofing work performed and the excellent communication and coordination exhibited by them.

Myra L. | Washington, DC

In my 12 years of having NV Waterproofing as a business partner, they have always proved reliable and trustworthy. They are a great value for me and my customers.

Darryl O. of Brookfield Homes, | Washington, DC

Great professional service and able to respond in timely manner to the project need.

Blake B. | Washington, DC

Brendan was very knowledgeable, professional and courteous. Highly recommend.

Cesar T. | Arlington, VA

A brief note to thank NV Waterproofing for extreme professionalism and courtesy in the manner in which my recent basement water seepage problem was addressed. From the initial contact with Jim, through the work with Roberto, Carlos and Jose, it was an overall pleasant experience – not to mention my contact with the owner and his responsiveness.

Ramesh T. | Arlington, VA

These guys were amazing. The initial visit was smooth, not pushy at all and he was even able to accommodate the relocation of a small drainage pipe. The demo to install the system was done beautifully, yes it was really good, you can tell they were precise and careful when doing so. Everything was clean, no stains on my carpet and they protected everything. No leak so far and I love it. Did I mention the price was excellent? I had 3 other companies to estimate thousands and even tried to sell extra unnecessary equipment. Thank you NV Waterproofing I have and will continue to recommend you.

Chelly Z. | Falls Church, VA

We appreciated NV Waterproofing's honesty and the men who worked tirelessly in uncomfortably cold weather. We've had one big storm since they finished and the basement walls are nice and dry. Nice work!

Peter V. | Falls Church, VA

Mauricio and Cristian were the initial sales reps who came to examine the issue and they took the time to test drainage that might have potentially been creating the water issue. They offered a reasonable solution (sealing the visible cracks and holes in the concrete) and I was contacted within a couple of days with an estimate and scheduling options. Sean was our tech and he did a fantastic job diagnosing the issue beyond just the cracks. He not only address all the holes and cracks in the concrete and mortar, he sealed up additional entry points above the foundation. He sourced additional materials to cover openings for cable lines. He went above and beyond and gave us measured information on how we should continue to monitor and treat this area as the house settles. He was thorough, informative, and provided excellent service in his work. I'm very glad that Sean was the technician sent to us and I would specifically request him for your projects.

Sara T. | Falls Church, VA

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Before & after photos

Check out before and after photos from some of our completed projects.

  • Sunken Concrete Step Repair in Stephens City, VA

    This Stephens City, VA homeowner was dealing with a sunken concrete front step that had settled over time, creating an uneven entryway and a noticeable tripping hazard near the front door. Sunken concrete steps can make everyday foot traffic unsafe for homeowners, guests, and delivery drivers, while also taking away from the home’s curb appeal. Our concrete repair team lifted and leveled the front step back to its proper position, creating a safer, more stable walkway and entrance. This concrete step repair helped reduce the risk of falls, improved the look of the front entry, and gave the home a cleaner, more welcoming appearance. The homeowner was thrilled with the outcome — a big transformation that improved both safety and curb appeal!

  • Basement Waterproofing in Winchestor, VA

    A homeowner in Winchester, VA, was struggling with a failing sump pump that couldn’t keep up during heavy rainstorms, leaving their basement vulnerable to water intrusion. The lack of a reliable backup system also left them worried about potential flooding during power outages. Frustrated and seeking a dependable solution, they contacted NV Waterproofing and Foundation Repair, a trusted basement waterproofing company in Winchester, VA.

    After assessing the situation, we replaced their old sump pump with a state-of-the-art TripleSafe Sump Pump system. This advanced system includes three levels of protection: a primary pump, a secondary pump for heavy water flow, and a battery backup to ensure the basement stays dry even during power outages. The homeowner now has peace of mind knowing their basement is fully protected, no matter the weather.

  • Pool Deck Leveling in Manassas, VA

    A homeowner in Manassas, VA, quickly realized their dream backyard pool was at risk when the surrounding concrete pool deck began to show serious problems. Uneven and sunken slabs created tripping hazards and unsightly cracks, making both safety and aesthetics a challenge for anyone using the space. Additionally, water from rain and pool use was pooling in low spots, causing slippery surfaces and further soil erosion beneath the deck. These issues not only threatened the safety of family and guests but also compromised the value and enjoyment of the home.

    Seeking an effective solution, the homeowner reached out to our team for a professional assessment. We identified the main cause of settlement: soil erosion under the slabs—a common issue in Manassas due to its clay-rich ground and fluctuating moisture. To address both the immediate hazards and prevent future damage, we recommended our two-part approach: the cutting-edge PolyLevel® concrete leveling system and NexusPro® Joint Sealant.

    The repair process began with drilling small holes into the affected concrete slabs, allowing us to inject high-strength PolyLevel® polyurethane foam beneath the surface. As the foam expanded, it filled voids, stabilized the soil, and gently lifted the slabs back to their original positions. The process was quick, clean, and minimized disruption, giving the pool deck a level, safe surface once again. PolyLevel® foam is waterproof and lightweight, reducing the risk of future settling and ensuring long-term durability, even in a wet poolside environment.

    To provide further protection, we sealed all cracks and joints with NexusPro® Joint Sealant. This flexible, weather-resistant sealant prevents water from seeping beneath the slabs, protecting the soil and concrete from additional erosion. The result was a clean, finished appearance that not only improved the look of the deck but also safeguarded it for years to come.

    Thanks to modern concrete leveling technology, the homeowner’s pool deck was transformed from a liability into a safe and attractive outdoor gathering space. The project was completed in a single day, with minimal mess and immediate results, giving the homeowner peace of mind and renewed pride in their backyard. If you’re facing similar issues with your pool deck in Manassas, VA, the PolyLevel® system and NexusPro® Joint Sealant offer a fast, effective, and lasting

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Frequently Asked Questions

What’s the difference between repairing and rebuilding a chimney? 2026-10-01T12:42:56-05:00

Repairing the foundation stabilizes the chimney by resolving the underlying settlement. Rebuilding replaces damaged masonry but doesn’t stop further movement if the chimney footing continues to settle. 

Is leaning chimney repair covered by warranty? 2026-10-01T12:42:28-05:00

Yes. Thrasher’s foundation repair solutions, including helical piers used to stabilize chimney footings, are backed by an industry-leading transferable warranty. While masonry repairs may have separate warranty terms, the foundation work is designed to provide long-term stability and peace of mind. 

Should I call a mason or a foundation company first? 2026-10-01T12:41:57-05:00

If your chimney is leaning or pulling away from the house, it’s best to lead with a foundation inspection. A foundation specialist can determine whether the chimney footing has settled and determine the root cause of the movement. Addressing the foundation first helps prevent spending on masonry repairs that could fail if settlement continues. 

Do I need to rebuild my chimney or can it be saved? 2026-10-01T12:36:35-05:00

Not necessarily. Many leaning chimneys can be stabilized by repairing the foundation beneath them, often with helical piers. Once the footing is stable, any needed masonry repairs can be completed. Rebuilding the chimney without first addressing the underlying settlement usually means the same problem comes back over time. 

Why is my chimney leaning into my roof? 2026-10-01T12:35:38-05:00

A chimney may lean toward the roof when the footing shifts unevenly on the side closest to the house. Poor drainage, such as overflowing gutters or downspouts that release water near the chimney, can contribute by softening the supporting soil. A foundation inspection can identify the cause and determine whether the chimney footing needs to be stabilized. 

Why is my chimney pulling away from my house? 2026-10-01T12:34:55-05:00

Most masonry chimneys are built on their own concrete footing, separate from the home’s main foundation. If that footing settles, the heavy chimney can start to separate from the house, creating a visible gap. The movement usually won’t stop on its own, so a professional inspection can determine whether foundation settlement is the cause and recommend the right repair. 

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