Mortar deteriorates faster than brick or stone, and failing joints let water seep into walls where it causes real structural damage. Repointing—removing old mortar and packing new material into the gaps—is essential maintenance that most masonry buildings need every 25–40 years. Catching it early saves thousands in water damage repairs down the road.
Why Mortar Fails
Mortar is softer than brick or stone by design: it's meant to fail first, protecting the masonry units themselves. Weather cycles, salt air, freeze-thaw stress, and poor original installation all accelerate breakdown. You'll spot failing mortar when joints crumble easily under a screwdriver, show gaps wider than 1/8 inch, or have visible cracks running through them. Buildings in coastal areas, cold climates, or those with old lime-based mortar degrade faster than others.
What Repointing Actually Involves
Proper repointing isn't just slapping new mortar over old joints. Contractors remove the old mortar to a depth of 2.5 times the joint width (typically 2–3 inches deep), clean out dust and debris with compressed air or water, dampen the joint, and then pack new mortar in with specialized tools. The mortar type matters—modern cement-based mortar works for most applications, but older buildings with soft brick or historic mortar need lime-based alternatives that match the original composition. Rushing this process or using the wrong mortar type causes new joints to fail in 5–10 years.
The work is slow and labor-intensive. A crew of two can typically point 20–30 square feet of wall per day, depending on joint condition and accessibility.
Cost Breakdown
Repointing costs range from $10 to $25 per square foot for standard brick or stone walls, though specialty work or historic restoration can run higher. A typical 1,000-square-foot chimney might cost $500–$1,200. Full-house repointing on a 2,000-square-foot ranch-style home with 6-inch brick typically falls between $3,000 and $8,000.
What drives the price up:
- Mortar type: Lime-based or custom-matched historic mortar costs 30–50% more than standard Portland cement
- Access: Second-story work, steep roofs, or tight spaces require scaffolding or lifts
- Joint condition: Heavily damaged joints take longer to clean and reset
- Masonry type: Fieldstone or irregular patterns take longer than uniform brick
- Location: Urban areas and coastal regions typically charge 20–40% more
Get at least three quotes. Reputable masons will visit the site, assess mortar depth and condition, and specify which mortar type they're recommending and why.
How to Find a Qualified Contractor
Not all general contractors do quality repointing. Look for masons with:
- 10+ years' experience in repointing (not just general masonry repair)
- Certifications from the International Union of Bricklayers or local masonry associations
- References from residential or commercial clients with similar projects
- Written specifications of mortar type, joint depth, and weather protection during curing
- Insurance and warranty coverage (reputable contractors warranty joints for 5–10 years minimum)
Avoid contractors who push overly aggressive pressure-washing or sandblasting—these can damage the masonry itself. A good mason hand-cleans joints with carbide or diamond tools.
Mercoly connects you with vetted masonry contractors in your area, making it easy to compare quotes and see customer reviews in one place.
Timing & Weather Considerations
Repointing requires specific conditions. The best window is spring or fall when temperatures stay between 40–85°F and humidity is moderate. Work done in winter frost or summer heat cures improperly and cracks prematurely. Plan for the crew to dampen and protect the wall afterward—freshly repointed joints need 2–3 weeks of gradual curing without heavy rain or freezing.
Budget 3–6 weeks for a full-house job, depending on wall area and weather delays.
When to Act
If you see crumbling mortar, gaps wider than 1/8 inch, or water staining inside walls near masonry, get a professional assessment. Early repointing costs less and prevents costlier foundation or structural repairs. Ignoring deteriorating mortar can lead to water damage inside walls, efflorescence (white mineral deposits), and eventually brick or stone displacement.
Frequently Asked Questions
Q: Can I repoint just a few problem areas, or do I need to do the whole wall? Spot repointing on a few joints is cheaper short-term but creates visible patching and inconsistent weathering; most contractors recommend repointing entire wall faces at once for durability and appearance.
Q: What's the difference between repointing and tuckpointing? Repointing replaces deteriorated mortar; tuckpointing is a cosmetic finish where a thin line of contrasting mortar or sealant is applied to hide uneven joints and is mostly decorative.
Q: Do I need to repoint if mortar is cracked but joints still feel solid? Surface cracks allow water infiltration and typically signal that mortar breakdown is underway; have a mason inspect it—waiting risks hidden water damage inside the wall.
Compare quotes from trusted masonry contractors in your area today to protect your home's structure.