Tuckpointing is the process of removing deteriorated mortar from the joints between bricks and replacing it with fresh mortar. Over time, Chicago’s freeze-thaw cycles break down mortar faster than the brick itself, so repointing the joints is what keeps a masonry wall waterproof and structurally sound. Done right, a tuckpointing job lasts 20–30 years. Learn more about our tuckpointing services →

Most of the time it’s a markup problem. Many “masonry contractors” bidding your job aren’t the ones doing the work—they’re sales outfits that sign the contract, then hand it off to a subcontracted crew and keep 20–40% off the top. The sub works with what’s left, and that’s where corners get cut. Shamrock is a family-run company with our own full-time crew. The person who walks your property is one of the owners, and the masons on the scaffold are the same team that’s been doing this work for decades. That’s why our number tends to land honest.

No. Every estimate is free, no obligation. One of the owners will come out, walk the property with you, explain what we’re seeing, and give you a written scope and price—usually within a day or two of the visit. Request your free estimate →

We aim to respond within one business day. During our busy season (April–October) it may take up to two, but we always get back to you. If you need something looked at urgently, call us directly at (708) 388-2871.

Every Shamrock job comes with a 5-year written warranty on materials and workmanship. Most of our work lasts well beyond that—proper tuckpointing, for example, holds up 20–30 years in the Chicago climate. If something goes wrong within the warranty window, we come back and fix it at no charge.

We cover the City of Chicago and surrounding suburbs, including the South Suburbs, Western Suburbs, North Suburbs, and DuPage County. Our shop is in Alsip, IL—we’ve been based here since 1981. See our full service area →

April through October is the sweet spot. Mortar needs temperatures above 40°F to cure properly, and it shouldn’t freeze within the first 48 hours. We do book winter emergency work when conditions allow, but for planned projects the spring–fall window gives the best long-term result.

Yes. Shamrock Tuckpointing is a fully licensed, insured, and bonded masonry contractor. We carry general liability and workers’ compensation coverage, and we’re happy to provide certificates on request. We’re also BBB A-Rated.

Properly done tuckpointing should last 20–30 years in the Chicago climate. The biggest factors are mortar mix (it must match the hardness of your brick), joint depth (too shallow and it fails fast), and workmanship. Shamrock backs every tuckpointing job with a 5-year written warranty, and most of our work outlasts that by decades. Learn more about our tuckpointing services →

Look for: crumbling or missing mortar between bricks, mortar you can scratch out with a screwdriver, hairline cracks running through joints, white chalky residue (efflorescence), or water staining on interior walls near masonry. If you see any of these signs, schedule a free inspection—catching it early avoids much bigger repair bills later.

Yes—when it’s done right. Our crew matches mortar color, texture, and joint profile (concave, V, flush, etc.) to your existing work. On older buildings with historic mortar, we adjust the mix to match the softer lime-based mortars used before WWII so the new work doesn’t stress the original brick.

Tuckpointing replaces deteriorated mortar in brick-to-brick joints using a mortar mix that bonds to both sides of the joint. Caulking fills expansion joints and transitions (brick to window, brick to lintel, etc.) with a flexible sealant. They’re different materials for different joints, and most buildings need both. Learn about our caulking services →

Warning signs include crumbling mortar joints near the top, a cracked or missing chimney crown, rusted or loose flashing where the chimney meets the roof, white staining (efflorescence), and water spots on the ceiling near the chimney. Because chimney damage is often at the top where you can’t see it from the ground, we recommend a professional inspection if your chimney is over 15 years old. Learn about chimney repair →

The crown is the concrete or mortar slab that covers the top of the chimney around the flue opening. It sheds water away from the flue. A cap is the metal cover that sits on top of the flue opening to keep out rain, animals, and debris. Both can fail and both are critical for keeping water out.

Yes. We install stainless steel chimney liners when the existing clay tile liner is cracked, deteriorated, or missing. A damaged liner is a fire and carbon monoxide hazard—if your chimney inspector flags it, don’t wait.

Yes. Chimney leaks usually come from one of three places: a cracked crown, bad flashing, or deteriorated mortar joints. We diagnose the source and fix it—not just patch over symptoms. In some cases a full chimney rebuild above the roofline is the right call, and we’ll tell you straight.

In most cases, yes. We maintain supplier relationships for reclaimed Chicago common brick and can source matching brick for most vintage and modern builds. When an exact match isn’t available, we get as close as possible and discuss options with you before starting. Learn about brick repair →

Spalling is almost always moisture getting trapped behind or inside the brick and then freezing. The freeze-thaw cycle pops the face off. Common causes include too-hard mortar (especially Portland cement on soft vintage brick), failed caulking letting water behind the wall, and clogged weep holes.

When a steel lintel rusts, it expands and pushes the brick above it out of alignment. The fix is to support the brickwork, remove the old lintel, install a new galvanized or stainless steel lintel, and reset or replace the displaced brick. Caulking over it or painting it buys you a season at best. Learn about lintel replacement →

It can be. Stair-step cracks follow the mortar joints in a diagonal pattern and usually indicate foundation settlement or lateral pressure. A few hairline stair-step cracks in an older building can be cosmetic, but wide or growing cracks need professional evaluation. We’ll tell you whether it’s a tuckpointing fix or something that needs a structural engineer.

Quality polyurethane or silicone-based caulk lasts 10–15 years on a Chicago building. Cheap acrylic caulk from a hardware store might last 3–5. We use commercial-grade sealants rated for masonry movement and our climate. Learn about our caulking services →

No. New caulk needs to bond to clean masonry on both sides of the joint. Layering over old, cracked caulk traps moisture underneath and the new bead peels off within a year. We always strip the old sealant, clean the joint, and apply fresh—it’s the only way it holds.

Sometimes. If the leak is at a transition joint (window-to-brick, lintel-to-brick) and the masonry around it is sound, re-caulking can solve it. But if the mortar joints themselves are failing, you need tuckpointing—caulking won’t fix deteriorated mortar. We’ll diagnose which you actually need.

Masonry repair is the catch-all for structural work that goes beyond repointing mortar or swapping a few bricks. Lintel replacement, parapet rebuilds, retaining walls, stoop and step reconstruction, stone repair, and coping replacement all fall under masonry repair. See our full masonry repair services →

In most cases the lintel needs to come out and be replaced—not repaired. A sagging lintel means the steel has lost structural integrity. We shore up the brickwork, remove the failed lintel, install a new one, and reset the masonry above it.

Yes. Concrete and brick stoop rebuilds are one of our most-requested jobs. We tear out the old structure, pour new footings where needed, and rebuild with matching brick, bluestone, or concrete to fit the building.

A bulging wall is serious. It can mean the wall ties connecting the brick veneer to the structural wall have failed, or there’s lateral pressure from the foundation. We evaluate whether a brick veneer re-anchoring or a partial rebuild is called for, and if it’s a foundation issue we’ll refer you to a structural engineer we trust.