Tuckpointing vs Rebuilding: What Your Brick Wall Actually Needs
Two quotes for the same brick wall can disagree by a mile: one says tuckpoint, the other says tear it down and rebuild. Here is how to tell which one your wall needs.
Why the two quotes disagree
Tuckpointing and rebuilding solve different problems. Tuckpointing renews the mortar joints of a wall whose bricks are still sound. Rebuilding replaces brick that has failed, or a section that has moved. A contractor who only does one of them tends to see every wall as that one. The useful question is not which is cheaper, but where the wall is failing: in the joints, or in the brick.
Signs the joints are the problem
Mortar recessed back from the brick face, sandy mortar you can scrape out with a key, hairline cracks that follow the joints, and small gaps at the head joints. If the brick faces are intact and the wall is straight, this is a tuckpointing job: the old mortar is ground or raked out to a consistent depth and new mortar is packed in. It is the less invasive repair and, done properly, it lasts decades.
Signs the brick itself is failing
Brick faces flaking or popping off (spalling), cracks running through bricks rather than around them, crumbling brick at the base of a wall or chimney, and staircase cracks above windows where a steel lintel is rusting. Repointing around failing brick only buys a season or two. Those bricks need cutting out and replacing, or the section needs rebuilding, with brick matched for size, color and hardness.
Chimneys: usually the top first
Chimneys take weather on every side, and the top fails first: a cracked crown lets water straight in, and the upper courses go soft. A common sound repair is rebuilding the top section and crown and repointing the rest. Before paying for any chimney masonry, rule out the flashing, which causes many chimney leaks that get blamed on the brick; our chimney repair page explains how to tell.
Parapets: the most exposed brick on the building
Parapet walls on flat-roofed buildings, from two-flats to condominium buildings to commercial blocks, are exposed on both faces and the top. Once a parapet has loosened or started leaning, repointing will not hold it. It is taken down to sound brick and rebuilt, usually with new coping and through-wall flashing, and the roof flashing has to tie into it properly. That is why parapet work and roof work are best planned together.
Lintels: fix the steel, not the crack
Steel lintels over windows and doors rust, and rust takes up more room than steel, so it pushes the brick above into a stair-step crack. Filling the crack does nothing. The brick around the lintel is taken out, the lintel is treated or replaced, and the brick is relaid with flashing over the steel.
The mortar matters as much as the method
Whichever repair the wall needs, the mortar has to suit the brick. Older Chicago common brick is soft, and a hard modern mortar will crack and spall it. Our lime vs Portland mortar guide explains why.
How we handle it
We inspect the wall, chimney or parapet, find where the water is actually coming in, and write one scope covering the masonry and anything it touches on the roof. Experienced partner masons do the brickwork; inside Chicago the mason of record is City-licensed, and we pull the permit. One estimate, one point of contact, one invoice. More on our tuckpointing and brick repair page.