What it is
Tuckpointing is the removal of failed mortar from existing masonry joints and the careful replacement of that mortar — color, sand, binder, and tooled profile matched to the original mason’s hand. Done right, it is invisible. Done wrong, it disfigures a wall for decades.
When you need it
Most walls signal it the same way:
- Hairline cracks running along the joint, not the brick
- Mortar that crumbles to powder under a screwdriver tip
- White efflorescence streaks below the eave or chimney shoulder
- Daylight visible at a joint after a hard rain
- Spalled or freeze-cracked brick faces above failed joints
A failed joint reads as a cosmetic problem and lives as a structural one. Water entering a wall through an open joint freezes inside the brick or stone behind it. The next thaw cycle pops a face off. Three or four winters of that and the wall is no longer the wall it used to be.
How we do it
We grind the failed joint out to three-quarters of an inch, never deeper than the joint width. We brush and rinse the kerf clean. We mix mortar in small batches, matching the binder ratio of the original — usually a lime-rich Type O or Type K on pre-1940s homes, Type N on newer work. We pack the joint in two lifts, let it set up firm but not hard, then strike the profile — concave, V, weather-struck, beaded — to whatever the original mason used. We leave the joint clean.
Materials and methods
- Matched lime mortar for soft historic brick. Portland-heavy mortar will spall it.
- Type N for contemporary above-grade brick and CMU.
- Refractory mortar on chimneys above the firebox.
- Sand sourced from the same regional quarries the original masons used where we can identify them.
- Hand-tooled joints — no power-saw shortcuts, no tube-extruded sausage.
We do not quote tuckpointing by photo. We come out, look at the wall in person, and assess what’s failing and why. The why is what determines whether the job is a square-foot tuckpoint or whether a course or a corner has to come down.