Tuckpointing is the repair of worn mortar joints in brick or stone: the old mortar is cut out to a consistent depth and replaced with new mortar matched to the original. In Lake County’s freeze-thaw winters, failed joints let water into the wall, so repointing them early is what keeps a brick home from needing brick replaced later.

Most brick homes around Mundelein, Libertyville and Lake Forest reach the point where some of their mortar needs attention. Brick itself can last a century or more; the mortar between it is designed to be the weaker, replaceable part of the wall. This guide explains how to spot mortar that has failed, what proper tuckpointing involves, when in the year it can be done in northern Illinois, and what to ask a masonry contractor before you hire one.

What is tuckpointing, and is it different from repointing?

Strictly speaking, repointing is the general term for removing deteriorated mortar and replacing it, while tuckpointing originally described a decorative finish, where a thin line of contrasting mortar was “tucked” into the joint to make old brickwork look crisper. Around Chicago the two words are used interchangeably, and most homeowners and contractors say tuckpointing when they mean any mortar joint repair. Either way, the goal is the same: sound, weather-tight joints that protect the brick and the wall behind it.

What are the signs your brick needs tuckpointing?

Mortar rarely fails all at once. It wears unevenly, usually worst where water runs or sits, so the first signs tend to appear in a few places rather than across a whole wall.

Recessed, crumbling or sandy joints

Run a key or screwdriver along a joint. Healthy mortar is hard and sits close to the face of the brick. If it scrapes away as sand, or the joint has receded a quarter inch or more behind the brick face, that section is due.

Cracks, gaps and missing mortar

Hairline cracks along joints, gaps you can see light or daylight through, or mortar that has fallen out entirely all let water straight into the wall. Stair-step cracks that follow the joints diagonally can also point to settlement, which needs assessing before any repointing.

Damp walls, stains and white residue

White, powdery deposits on brick (efflorescence), dark damp patches that linger after rain, or moisture on an interior wall behind the brick are signs water is moving through the masonry. Failed joints are one of the most common entry points.

Loose or flaking brick

When water sits in a wall and freezes, the faces of bricks can pop off (spalling) and individual bricks can loosen. At that stage the job is no longer just tuckpointing: damaged brick has to be replaced as well, which is why catching failed joints early matters.

The chimney usually goes first

Chimneys are exposed on every side, take the most wind-driven rain and heat-and-cool cycling, and are the hardest part of the house to see. If the rest of the house looks sound, it is still worth having the chimney joints checked.

Why do Lake County winters wear mortar out faster?

Water expands by roughly nine percent when it freezes. Northern Illinois sees dozens of freeze-thaw cycles each winter, and every one pushes on any water sitting in a cracked or porous joint. Over years that slowly opens the joint further, lets more water in, and speeds the whole process up. De-icing salt around steps, walkways and driveways adds to it, which is why masonry steps and the lowest courses of brick near grade often need repair before the rest of the wall.

What does proper tuckpointing involve?

Good tuckpointing is slow, careful work, and most of the difference between a repair that lasts decades and one that fails in a few winters happens in steps you cannot see once it is done.

Assessment first

A mason should look at the whole wall, not just the worst joints: how widespread the deterioration is, whether any brick needs replacing, whether cracks suggest movement, and where water is coming from, including flashing, caps and gutters that may be the real source.

Cutting out the old mortar to the right depth

Deteriorated mortar is removed to a uniform depth, generally about two to two and a half times the width of the joint, so the new mortar has enough body to bond and hold. Cutting too shallow is the most common shortcut, and it produces a thin skim of mortar that falls out within a few seasons.

Matching the mortar, not just the colour

New mortar should match the original in colour and texture, and just as importantly in strength. Mortar is meant to be softer than the brick so that movement and moisture are taken by the joint, not the brick. Many older Lake County homes were built with softer, lime-rich mortar; repointing them with a modern, hard, high-cement mix can trap moisture and crack or spall the brick around it.

Packing, tooling and curing

The new mortar is packed into the joint in layers, then tooled to match the joint profile of the rest of the wall, which also compresses it and helps it shed water. It then needs to cure slowly; in warm or windy weather that can mean misting the work so it does not dry too fast and weaken.

Tuckpointing, brick repair or restoration: which does the wall need?

If the brick is sound and only the joints have failed, tuckpointing alone is the fix. If bricks are spalled, cracked through or loose, they need to be cut out and replaced with a matching brick before the surrounding joints are repointed. And where large areas have failed, a wall has bulged, or an older home needs its original character kept, the work becomes masonry restoration: rebuilding sections to match the original brick, bond pattern and mortar. A good contractor will tell you which you need and why, rather than selling the largest job.

When can tuckpointing be done in northern Illinois?

Mortar needs to cure above freezing, so most masons in the area tuckpoint from spring through late fall, when temperatures stay reliably above about 40°F for the days after the work. Late-season jobs are possible with cold-weather precautions such as covering and protecting the work, but the practical season is shorter than it looks. If you notice failing joints in the fall, having them assessed before winter at least tells you whether anything needs protecting now and lets you get on a contractor’s schedule for early spring.

How do you choose a masonry contractor for tuckpointing?

Because the quality of tuckpointing is mostly hidden once it is finished, the questions you ask before hiring matter more than for most home projects.

How will you match my mortar?

Listen for an answer about strength and composition as well as colour. For an older home in particular, the contractor should be thinking about using a mortar that is softer than the brick.

How deep will you cut the joints?

You want to hear a consistent depth tied to the joint width, not “we clean them out”. Ask to see it on a small area first if you are unsure.

Can I see recent work nearby?

Brickwork in Lake County a few years after repointing is the best evidence of how a contractor’s work holds up through local winters.

Is the scope in writing?

A written scope should say which walls or areas are included, how much brick replacement is expected, how the mortar will be matched and how the site will be protected and cleaned.

Frequently asked questions

How long does tuckpointing last?

When the joints are cut to the right depth and the mortar is properly matched, repointed joints commonly last for decades. Joints that were only skimmed over, or filled with mortar that is too hard for the brick, can fail within a few winters.

Does tuckpointing stop leaks?

It stops water coming in through failed joints, which is one of the most common sources. Leaks can also come from chimney caps, crowns, flashing, gutters or windows, so a good assessment checks those before assuming the joints are to blame.

Is tuckpointing the same as brick repair?

No. Tuckpointing repairs the mortar joints. Brick repair replaces damaged or loose bricks. Many walls need both, in that order: replace the failed brick, then repoint around it.

Can you tuckpoint in winter?

Not in freezing conditions without protection, because mortar that freezes before it cures loses strength. In northern Illinois most tuckpointing is done between spring and late fall.

Tuckpointing and masonry repair from A.M. Woodland

A.M. Woodland Construction handles tuckpointing, brick repair and masonry restoration for homes across Mundelein and Lake County, along with new brick and stone work: stone veneer, masonry steps, columns, fireplaces and natural stone and limestone retaining walls. See our masonry services to find out more or to arrange an assessment of your brick.