What Is the Difference Between Tuckpointing and Repointing?
In everyday use, tuckpointing and repointing mean the same job. A mason cuts worn mortar out of the joints and packs in new mortar. Strictly speaking, tuckpointing is an older decorative finish. Federal preservation guidance and the brick industry’s technical notes both draw that line.
The word on a quote matters less than the mortar that goes back in. On older brick, the new mortar should be softer than the brick. We cut out failed joints and repoint brick and stone with matched mortar. Our tuckpointing and repointing work covers walls, foundations, steps and facades around Mechanicsburg.
What does each word mean?
Repointing means removing worn mortar from the joints and placing fresh mortar. Federal preservation guidance and the brick industry both define it this way.
In the strict sense, tuckpointing is an older finish for looks. The mason fills the joint flush in a color close to the brick. Then a thin strip of contrasting mortar or lime putty is shaped on top. From the street, the wall looks like it has very fine joints.
The brick industry notes that the two words often get used interchangeably. It adds that the meaning of tuckpointing can vary by region, which can lead to disputes over job scope. On this site, tuckpointing means repointing in the everyday sense. Whoever you hire, ask what the quote covers: how deep the joints get cut and what mortar goes back in.
How does a mason judge failed mortar joints?
The brick industry’s technical notes list the conditions that call for brick repointing:
- mortar worn back more than a quarter inch from the brick face
- mortar that crumbles
- holes or voids in the joints
- hairline cracks in the mortar
- cracks between the brick and the mortar
A mason looks first, then scrapes. Federal guidance starts with a screwdriver, then taps harder with a chisel and hammer. It tests the brick even more gently, with a fingernail. The goal is to learn which is softer, the mortar or the brick.
Next comes the cause. Federal guidance names leaking roofs or gutters and a settling building among the root causes. Fix the source first, or the new mortar wears out the same way.
The same guidance prefers repointing only the joints that need it. Once 25 to 50 percent or more of a wall needs work, redoing the whole wall may cost less.
Cracks that cut through the bricks themselves can signal a structural problem. Federal guidance puts structural repairs ahead of repointing. Cracked or flaking bricks call for brick repair alongside the repointing.
Why does older brick call for softer, lime-rich mortar?
Many homes around here are old. Census estimates show nearly half the homes in York and Gettysburg were built in 1939 or earlier. In Harrisburg and Carlisle, it is about 4 in 10. In Mechanicsburg, it is about 1 in 3.
Until about 1900, the usual brick mortar was lime and sand. Portland cement was not made in this country until the 1870s. It came into common use in the early 1900s.
Federal guidance says new mortar must be softer than the brick and let moisture pass more easily. It should also be no harder than the old mortar, and the brick industry agrees. For a wall of soft old brick, federal guidance prefers a softer lime mortar.
A wall swells and shrinks with the weather. Soft mortar gives a little and takes that stress. Mortar harder than the brick pushes the stress into the brick, and the faces crack and spall. Moisture trapped behind hard mortar can also pop the faces off soft brick.
Mortar types run from hardest to softest as M, S, N, O and K. Carlisle’s historic district guide rules out Type S mortar on brickwork from before the 20th century. It also calls bagged Type N and Type S premixes too strong for historic masonry.
Color comes mostly from the sand, so matching starts there. Federal guidance matches the unweathered mortar deep in the joint. It cures a small test batch for about a week, then breaks it open to compare. New joints look a little different at first and usually blend in as they age.
How does freeze-thaw wear down brick around Harrisburg?
NOAA climate normals for two airport stations near Harrisburg show about 101 nights a year at or below freezing. On more than 80 of those days, the daytime high climbs back above freezing. Most freezes fall between November and March, and January has the most.
Each thaw lets water soak into open joints and cracks. Each freeze turns that water to ice, which expands and pries the gap wider. Federal guidance calls water the most destructive force on old masonry. The brick industry calls repointing one of the most effective ways to keep water out.
Federal housing guidance notes that chimneys face more weather than most parts of a house. Carlisle’s guide names a chimney top above the roof line as extreme exposure. Even there, it says to err on the weak side with mortar. Chimney joints are covered on our chimney repair page. For market numbers, see chimney repair costs in Pennsylvania.
Weather also sets the work season. Federal guidance calls for wall temperatures between 40 and 95 degrees during repointing. In this climate, that points to spring through fall.
What signs can a homeowner see?
Look closest near downspouts and under leaky gutters, where water runs down the wall.
| What you see | What it often means | Next step |
|---|---|---|
| Mortar sunk back more than a quarter inch | Worn joints | Repointing |
| Mortar that scrapes out like sand | Failed mortar | Repointing |
| Hairline cracks, or gaps between brick and mortar | Water can get in | Repointing |
| Brick faces flaking or popping off | Water and freezing, or mortar harder than the brick | Brick repair, then matched mortar |
| White powder on the brick | Salts left by moisture moving through the wall | Find the water source |
| Cracks through the bricks themselves | Possible structural movement | Structural check first |
| Loose bricks | Mortar that no longer holds | Reset the bricks in new mortar |
| Damp walls or damaged plaster inside | Water getting through | Find the leak first |
White powder, called efflorescence, is usually harmless on the surface. The water that carries the salts is the real problem.
When should you call a mason?
Call when worn joints spread across a section of wall. Call sooner when bricks are loose or water shows up inside. Fix gutters and downspouts first, so the new mortar gets a fair start.
In a historic district, check with the borough or city first. York, Carlisle, Gettysburg and Mechanicsburg each review exterior work in their historic districts. York’s application lists masonry repointing by name. Under the state construction code, ordinary repairs need no permit, but local rules can add a review.
Before you hire, ask a few questions:
- What does tuckpointing mean on this quote?
- How deep will you cut the joints? Guidance says at least twice the joint width.
- How will you cut joints on soft old brick?
- What mortar goes in, and how does it compare with the old mortar?
- Can I see a small test patch for color first?
How do you get a quote for repointing?
Steven Rigg Masonry repoints brick and stone on walls, foundations, steps and facades around Mechanicsburg and the Harrisburg area. We look at the job and put the quote in writing. See our tuckpointing service or call or text (717) 608-2175.