Quick Answer
Okay, so here's the quick version. You're seeing cracks or gaps in the mortar between your bricks? Nine times out of ten, it's just wear and tear from weather. Water gets in, freezes, and pushes the mortar out. For a few small cracks, you can absolutely fix it yourself on a Saturday for less than $50. You'll need a bag of mortar mix and a few basic tools. But if you're looking at a whole wall that's crumbling, or the bricks themselves are busted, that's a different story. You're gonna need a pro, and that can run from a few hundred to thousands.
Common Symptoms
Possible Causes
Step-by-Step Diagnosis
Step 1
Perform a visual walk-around of the entire structure, paying close attention to chimneys and walls that face prevailing weather.
Step 2
Use a simple tool like a screwdriver to gently probe suspicious-looking joints. If the tool sinks in easily or the mortar crumbles, it needs replacement.
Step 3
Determine the depth of the damage by scraping out a small section of the failed mortar. Damage over 3/4-inch deep requires more intensive repair.
Step 4
Examine the bricks or stones next to the damaged mortar. If the masonry units themselves are cracking or flaking, it indicates a more serious problem than just mortar failure.
Step 5
Assess the total area of damage. Is it a few localized spots or a widespread issue affecting a large percentage of the wall?
DIY vs Professional Costs
| Repair Type | DIY Cost | Professional Cost | Time Required |
|---|---|---|---|
Tiny Patch Job (A few small cracks) | $20-$50 | $250-$500 (minimum charge) | 1-2 hours |
Weekend Project (A section of wall, 20-30 linear feet) | $75-$200 | $500-$1,500 | 1-2 days |
Major Repointing (Full wall, chimney, etc.) | Not Recommended | $2,000-$10,000+ | 1-2 weeks |
When to Call a Professional Concrete
- The mortar deterioration is widespread, covering more than 10-15% of a wall.
- The wall itself is bowing, bulging, or leaning, indicating a structural failure.
- The bricks or stones are cracking, flaking, or crumbling, not just the mortar.
- You see large, stair-step cracks that cut through the bricks.
- The repair is on a chimney or second story, requiring scaffolding or extensive ladder work.
- Your home is a historic building (pre-1940s) that requires specialized lime-based mortar.
- You're dealing with persistent water leaks that you can't solve with simple patching.
Prevention Tips
- Regularly clean your gutters and ensure downspouts direct water far away from the foundation.
- Perform a visual inspection of your masonry walls at least once a year to catch small cracks before they become large problems.
- Keep landscaping trimmed back at least one foot from masonry walls to allow for proper air circulation and drying.
- Use caution with power washers; excessive pressure can damage mortar and brick faces.
- Avoid applying non-breathable sealers, as they can trap moisture inside the wall and cause more damage.
Frequently Asked Questions
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