Does cracked mortar mean my foundation is failing?
Usually not — but it depends on the crack. How to tell a mortar problem from a structural one on brick and block foundations in Omaha, and what each one costs to fix.
Most of the time, no. Cracked mortar in a brick or block foundation is usually a mortar problem — the mortar wore out, water got in, freeze-thaw did the rest — and the fix is repointing. But some cracks are the foundation telling you it's moving, and those need a different conversation. Here's how we tell them apart on a free estimate, and how you can too.
Read the crack
Stair-step cracks following the joints
The most common crack on brick and block foundations in Omaha. The crack zig-zags up through the mortar joints, not through the brick. If the crack is narrow (under ¼"), the same width top to bottom, and the mortar around it is crumbly, it's almost always a mortar failure. Repoint it, fix the water source, done.
If the stair-step crack is wider at the top than the bottom (or vice versa), or one side of the crack sits proud of the other, the wall has moved. That's settling or heaving, and repointing alone won't hold.
Horizontal cracks
A long horizontal crack in a block foundation wall, especially a third of the way down from the top, means soil pressure is pushing the wall inward. This is structural. We'll tell you so and recommend an engineer or a foundation specialist before anyone touches the mortar.
Vertical cracks
A straight vertical crack through block or poured concrete is usually shrinkage or minor settling. Narrow and stable: seal it. Wide, growing or leaking: get it evaluated.
Cracks through the brick itself
When the crack runs through the faces of the bricks rather than around them, there's enough stress to break the unit. That's movement, not mortar.
The quick checks
- Measure and date it. Pencil a line across the crack, write the date. If it's wider in three months, it's moving.
- Look for offset. Run a finger across the crack. If one side sticks out, the wall has shifted.
- Check doors and windows. Doors that have started sticking and drywall cracks at the corners of openings point to movement.
- Check the water. Is a downspout dumping at that corner? Does the grade slope toward the house? Most "foundation problems" in Omaha start as drainage problems.
What each fix looks like
| Diagnosis | Fix | Who does it |
|---|---|---|
| Failed mortar, wall stable | Grind out and repoint, regrade, extend downspouts | Us — brick foundation repair |
| Failed mortar plus water in the basement | Repoint plus seal/waterproof the wall | Us — with basement waterproofing |
| Minor settling, crack stable | Repoint, monitor, fix drainage | Us, with a note to watch it |
| Active movement, horizontal crack, bowing | Piers, anchors or bracing, then repoint | Engineer / foundation specialist first, then us for the masonry |
Why we'll tell you if it's not us
We don't do piering or wall anchors, and we'd rather lose a job than repoint a wall that's still moving — it fails, and you're out the money. If your crack is structural, Jake will say so on the spot and point you to the right people. If it's mortar (and it usually is), he'll quote the repointing and that's what you'll be billed.
Related questions
A few more answers.
Can I just caulk a foundation crack?
Does homeowners insurance cover foundation mortar repair?
Ready for a straight answer on your house?
Free, honest estimates across the Omaha metro — Mon–Sat, 8 AM–8 PM. Talk to the owner, not a call center.