Mortar Cracks

Spot and Fix Mortar Cracks Before They Compromise Your Florida Home

Mortar cracks on brick or stone walls can signal deeper structural issues—not just wear and tear. In Florida’s unstable soils and high humidity, they often point to foundation problems. LUX Foundation Solutions identifies and repairs the root cause to protect your home.

Close-up cracked mortar joints caused by foundation settlement, which need mortar crack repair in Northern Florida.

What Are Mortar Cracks?

Mortar cracks are fissures that develop in the joints between bricks, blocks, or stones. In Florida’s shifting soils and high moisture, they’re often more than cosmetic. 

 

Mortar is softer than brick, so it fractures first when a foundation moves or walls face pressure. Cracks may appear as thin hairlines, vertical or horizontal lines, stair-step patterns, or crumbling mortar joints. Left untreated, they weaken walls, invite water intrusion, and signal foundation settlement. 

 

At LUX Foundation Solutions, we identify whether cracked mortar is surface wear or a warning sign, providing expert assessments and lasting foundation repair strategies for Florida homes.

Common Signs of Mortar Cracks in Florida Homes

Not all cracks in mortar look the same—and not all are harmless. In Florida’s climate, where high humidity and shifting soils are common, these cracks often signal structural stress or foundation movement. 

 

Watch for these signs that point to foundation stress rather than simple wear:

  • Stair-step cracks running through mortar joints in brick walls
  • Vertical cracks in mortar separating bricks or blocks
  • Horizontal mortar cracks that widen after heavy rain
  • Crumbling mortar joints that fall away when touched
  • Mortar gaps near windows or doors where walls shift under pressure.
  • Visible spacing or separation between masonry units.

If you notice these cracks in your Jacksonville, St. Augustine, Gainesville, Ocala, or Palm Coast home, schedule a free assessment with the LUX team before the problem escalates.

What Causes Mortar Cracks in Florida?

Understanding the root cause is key to stopping cracks in mortar from spreading—and protecting your foundation. These are the most common causes we see across homes in Florida:

A stair-step mortar crack due to foundation settlement, causing mortar cracks in the Palm Coast, FL, brick wall.

Foundation Settlement

Uneven settlement in Florida’s sandy or clay-rich soils places stress on exterior walls. As the foundation shifts, mortar joints split into stair-step or vertical cracks. These cracks often worsen after storms or drought cycles, signaling deeper structural movement.

Illustration of hydrostatic soil pressure causing mortar cracks in the Ocala, FL, home foundation wall.

Hydrostatic Pressure

Heavy Florida rains raise groundwater levels, pushing against brick or block walls. This constant soil pressure creates horizontal cracks in mortar that widens over time. If ignored, walls may begin to bow or lean inward, putting the home’s stability at risk.

Illustration of an expansive soil near the foundation, causing the mortar cracks problem in Middleburg, FL.

Expansive Soils

In areas with clay pockets, soils expand when wet and shrink when dry. This repeated soil movement shifts foundations and forces mortar joints to crack in stair-step patterns. Florida’s alternating storms and droughts make this problem especially common in brick or block homes.

A big tree near the foundation where roots are disturbing soil stability, causing the mortar cracks problem in Palatka, FL.

Tree Roots and Vegetation

Large tree roots near the home compete for soil moisture and displace the surrounding ground. In Florida, this uneven support causes foundations to shift, leading to cracks in brickwork mortar joints, especially around exterior corners, chimneys, or porches.

A short downspout with water flowing near he foundation, a poor drainage causing the mortar cracks problem in Gainesville, FL.

Poor Drainage

Improper grading, clogged gutters, or standing water around the foundation weaken soils. Over time, this instability creates pressure that transfers to brick or block walls, forming cracked mortars that worsen with Florida’s frequent and heavy downpours.

Our Proven Mortar Crack Repair Solutions

At LUX Foundation Solutions, we don’t just patch mortar cracks—we stabilize the foundation to fix mortar cracks and stop new ones from forming. Each situation requires a tailored solution designed for Florida’s soils and climate.

Why are stair-step cracks forming near the corner of my brick wall in Palm Coast, FL?

Stair-step mortar cracks in Palm Coast often indicate foundation settlement due to sandy, moisture-sensitive soil. As parts of your foundation sinks unevenly, brick walls pull apart, forming jagged cracks in brickwork mortar joints. 

 

At LUX, we install push piers beneath your foundation to fix mortar cracks, lift and stabilize it—stopping further damage and restoring structural integrity.

My exterior wall is bowing outward in Gainesville—what’s causing this?

In Gainesville, high groundwater and shifting soils can push against foundation walls, causing them to bow and crack. This pressure often leads to wide mortar joint separation. 

 

LUX uses wall anchors to counteract lateral force, restore wall alignment, and reinforce your foundation permanently—keeping your home safe in Florida’s unstable soil conditions.

I see long vertical mortar cracks forming between bricks in St. Augustine—should I be concerned?

Yes. Vertical cracks between bricks in St. Augustine may result from foundation stress or wall movement due to nearby root pressure or erosion. 

 

At LUX, we install carbon fiber straps—a non-invasive, high-strength solution that bonds directly to your wall and halts crack progression without major excavation.

Our Ocala home has wide mortar cracks and sagging in the basement—what’s the fix?

This is common in older Ocala homes where support beams degrade over time or soil beneath the structure shifts. These issues weaken brick and mortar walls, especially around support points. 

 

LUX offers wall stabilizer steel I-beam reinforcement to brace compromised walls and prevent further bowing or cracking—restoring stability before costly structural damage occurs.

Don’t Wait Until Mortar Cracks Worsen — Schedule a Free Estimate Today!

Mortar cracks may look small, but in Florida’s shifting soils and humid climate, they often signal foundation stress that spreads fast. Don’t wait until small fissures turn into structural risks.

 

At LUX Foundation Solutions, we provide expert foundation repair services in Jacksonville, Gainesville, Ocala, St. Augustine, Palm Coast, and surrounding areas. Whether your home shows stair-step cracks in mortar, gaps between bricks, or crumbling mortar joints, our team will inspect your foundation and recommend the right long-term solution.

 

Call 904-921-3589 to schedule your free foundation assessment today and get peace of mind before minor cracks turn into major damage.

Request a free Estimate

Mortar Cracks FAQ's

When should I be worried about cracks in mortar in Ocala or Palm Coast?

If you see stair-step cracks, widening gaps, or crumbling mortar—especially near your foundation in Ocala or Palm Coast—it may signal foundation issues. These areas are prone to soil shifts, so don’t ignore the warning signs. Our team here at LUX can provide  a free assessment of the structural risk.

What to do if mortar cracks in your Jacksonville home?

Cracks in mortar—particularly in Jacksonville’s humid, sandy environment—should never be brushed off as cosmetic. Before patching, schedule a professional assessment. 

 

LUX team investigates the cause and offers long-lasting solutions tailored to your property’s needs, whether the damage is from erosion, tree roots, or foundation settlement.

How much does it cost to repair mortar cracks in Florida?

Mortar crack repair in Florida can range from basic repointing to full foundation stabilization, depending on severity. LUX provides free, no-obligation assessments and clear estimates, with service areas across Gainesville, Ocala, Palm Coast, and more. We match your needs with durable, cost-effective solutions.

Are cracks in mortar between stones serious in Florida?

Yes. In Florida, mortar between stones weakens faster due to high humidity and salty stormwater exposure. Cracks often mean the foundation is shifting—especially if they appear in a stair-step or spreading pattern. 

 

Our LUX team evaluates and recommends proper reinforcement to protect your stonework and structure.

Can I repair cracked mortar myself in my Gainesville home?

DIY repairs in places like Gainesville only mask the problem. Without stabilizing the foundation, those cracks will return—often worse. Our team here at LUX will identify and determine if your issue stems from soil erosion, poor drainage, or settlement, and we provide expert mortar crack repair solutions designed for Florida’s unique climate.

Scroll to Top