Brick and block structures are built to last decades—but only if you maintain them properly. Neglecting mortar joints, cracks, and weathering can lead to costly structural damage and safety issues that are far more expensive to fix. Learning the fundamentals of brick maintenance helps you catch problems early and keep your walls performing their job.
Why Regular Brick Maintenance Matters
Brick is durable, but it's not maintenance-free. Water penetration is the main culprit behind deterioration. When moisture gets behind the brick face and freezes, it can push mortar out and crack units. Over time, this weakens the structural integrity and creates pathways for further water damage into your building.
Most brick walls have a lifespan of 100+ years, but only with consistent upkeep. Catching issues early—like failed mortar joints or spalling bricks—prevents them from spreading and compounding your repair costs.
Inspect Your Brickwork Regularly
Schedule a visual inspection at least once per year, ideally in spring or fall.
Look for:
- Mortar joint deterioration – Mortar should be flush or slightly recessed. If you can scrape it out easily with a screwdriver, it needs repointing.
- Cracks in brick units – Horizontal cracks are more serious than vertical ones. Step cracks (stair-step pattern) often signal foundation movement.
- Spalling – When the brick surface flakes or chunks come away, exposing the interior, the unit may need replacement.
- Efflorescence – White, chalky deposits on the surface indicate salt migration. Usually harmless but signals moisture movement.
- Vegetation growth – Moss, ivy, or vines trap moisture and accelerate decay.
Repointing: The Most Common Repair
Repointing (replacing failed mortar) is typically the first maintenance step and costs $15–$30 per square foot, depending on your region and mortar depth. For a typical 100 square foot wall section, expect $1,500–$3,000 in labour.
The process involves:
- Removing old, crumbling mortar (usually 2–3 times the mortar joint width deep)
- Cleaning out dust and debris
- Applying fresh mortar that matches the original in colour, strength, and composition
- Tooling joints to match the existing profile
Critical point: Using the wrong mortar type accelerates future damage. Modern brick often requires softer, more flexible mortar (Type N or O) than older hard-fired units. A reputable bricklayer will test the existing mortar and match it appropriately.
Cleaning Brick Safely
Pressure washing can damage mortar joints and force water into brick. For most residential brick, use a soft brush and mild detergent solution instead.
If staining is severe:
- Chemical cleaners for efflorescence or rust stains run $300–$800 for professional application on a typical house facade
- Gentle acid wash (used by pros) removes stubborn deposits without the risk of high-pressure damage
- Avoid DIY pressure washing over 500 PSI on brick
Addressing Cracks and Spalling
Small hairline cracks in mortar joints are normal and expected. Cracks wider than ¼ inch warrant investigation—they may indicate settling, foundation issues, or moisture problems.
Spalling bricks (where the face layer is damaged but the core remains sound) can sometimes be left alone if they're not absorbing excessive water. Fully compromised units should be replaced. Single brick replacement typically costs $100–$300 per unit in labour, plus material, depending on brick type and location.
For structural cracks (those that span multiple bricks or show a stair-step pattern), consult a structural engineer before attempting repairs. These often indicate underlying foundation or wall movement that needs professional assessment.
Waterproofing Considerations
Applying a water-repellent sealant can extend the life of your brickwork. Quality masonry sealers cost $300–$1,000 for a typical house exterior and last 3–7 years. Choose breathable products that allow moisture vapor to escape; trapping moisture inside is worse than leaving brick unsealed.
Finding and Hiring a Qualified Mason
Not all bricklayers specialize in repair work. When hiring, ask for:
- Experience with repointing and masonry repair (not just new construction)
- References from previous maintenance jobs
- Mortar analysis or testing (they should match existing mortar, not guess)
- Written quotes specifying mortar type, labour scope, and timeline
You can compare and find trusted brick and block laying providers in your area through Mercoly, which connects you with vetted specialists for straightforward comparison.
Frequently Asked Questions
Q: How often should I repoint my brick walls? A: Well-installed mortar typically lasts 25–40 years, depending on climate and exposure. More exposed walls or harsh weather may need repointing every 20 years; sheltered walls might go 50+ years.
Q: Can I patch small mortar cracks myself? A: Small cracks can be filled with flexible caulk or mortar caulk temporarily, but proper repointing (removing and replacing mortar 2–3 joint widths deep) is the lasting solution and shouldn't be DIY'd.
Q: Is my brick facade load-bearing? A: Most modern residential brick is veneer (non-structural), but older homes often have solid brick walls. A structural engineer can determine this; it affects repair urgency and cost.
Get quotes from qualified masons in your area today to assess your brick's condition and plan maintenance before small issues become expensive problems.