Cracks Over Your Windows? It Might Be a Lintel Problem
You’re walking around your house, enjoying a nice day, and then—bam—you spot a crack forming above your window. Maybe it’s small. Maybe it’s zigzagging like lightning through the bricks. Either way, it doesn’t look good. But what’s actually going on? If there’s one thing we’ve seen time and time again here in Milwaukee, it’s homeowners ignoring those little cracks until they turn into serious structural problems. Most of the time, the issue isn’t the brick itself. It’s the lintel. Let’s break down what a lintel is, why it fails, what signs to look for, and—most importantly—how we fix it the right way. What’s a Lintel, Anyway? A lintel is a horizontal support—usually made of steel or concrete—that sits above windows and doors in brick walls. It carries the weight of the bricks above the opening, preventing them from sagging or cracking. Without a lintel, or with one that’s failing, the bricks above your windows and doors can’t hold themselves up. That’s when you start seeing cracks, shifting masonry, or bowed walls. In older Milwaukee homes, many of these lintels were installed decades ago and weren’t designed to last forever. Add in our freeze-thaw cycles, moisture, and general Midwest weather abuse, and you’ve got a recipe for failure. Common Signs of Lintel Trouble Here’s what to watch out for: 1. Cracks Forming Above Windows or DoorsEspecially those that angle upward from the corners—classic sign the lintel is sagging and bricks are being forced to carry weight they weren’t meant to. 2. Rust Stains on the BrickSteel lintels rust. When that rust expands, it puts pressure on the bricks, causing them to crack or bulge. The rust also bleeds through, leaving brown streaks. 3. Bowing or Bulging WallsIf the wall above an opening is starting to bulge outward, it’s often because the lintel has failed and the bricks are being pushed out of place. 4. Separation Between Brick and Window FrameThe gap wasn’t always there—it’s growing as the support shifts and bricks drop. 5. Water InfiltrationFailed lintels allow moisture into areas it doesn’t belong. This leads to interior leaks, insulation damage, and even mold. 6. Brick Displacement During StormsIn homes with already weakened lintels, a heavy rain or windstorm can dislodge bricks or expand existing cracks overnight. Why Milwaukee Homes Are at Risk We’re not just making noise. Lintel issues are rampant in this area for a few key reasons: In neighborhoods like Riverwest, Sherman Park, and Bay View, homes often sit on tight lots and were built with older materials. Brick lintels or undersized steel supports were common in many of these homes. We’ve handled dozens of projects in these areas and know what to expect. Our Lintel Repair Process We don’t cut corners—because doing this wrong is worse than not doing it at all. Here’s how we approach lintel repair in Milwaukee: Step 1: Full InspectionWe start by examining both the visible damage and the hidden causes. We check the condition of the lintel, flashing, mortar joints, and surrounding masonry. We also assess if there are drainage or grading issues contributing to the failure. Step 2: Brick RemovalWe carefully remove bricks above the window or door to access the failing lintel. Our crew is trained to do this without damaging surrounding masonry. Step 3: Replace or Reinforce the LintelDepending on the extent of the damage, we’ll either install a new galvanized steel lintel or reinforce the existing one. We make sure it’s properly sized and seated to carry the full load. Galvanized lintels are our go-to—they resist rust better and last longer in our climate. Step 4: Add Flashing and SealantsThis part is crucial. We install proper flashing above the lintel to redirect water and keep future rust at bay. Sealants are used to protect all vulnerable joints. Step 5: Rebuild with Matching Brick and MortarOnce the structure is sound, we reinstall the bricks, taking the time to match the existing mortar color and texture so the repair doesn’t stand out. We use reclaimed brick when necessary, and we’re not afraid to stain and blend. Step 6: Final Grade and Drainage CheckWe make sure water flows away from the repair—not toward it. This prevents a repeat problem down the road. Step 7: Warranty and Check-InWe stand by our work. Once the repair is done, we schedule a follow-up inspection in 6–12 months to make sure everything’s still solid. Real Stories from Milwaukee Homeowners One customer in the Bay View area called us because their second-story window had a widening crack. Another contractor told them it was just a cosmetic issue. We knew better. We opened up the wall and found a completely rusted lintel with crumbling support. We replaced it, cleaned the surrounding bricks, and now you can’t even tell work was done. Another project in Wauwatosa involved a historic brick home where a previous repair had been done without any lintel at all—just mortar holding things up. It held for a few years, then started to collapse. We rebuilt the opening with proper support and saved the original bricks. We also helped a homeowner in Glendale who’d dealt with two prior repairs—both had skipped the flashing. Their lintel rusted again within five years. We rebuilt it from scratch, added a water diverter, and made sure the wall won’t need attention again for decades. In one East Side triplex, we were called after a renter reported a musty smell coming from the window. Turns out, a failed lintel had let water in through the brick cavity for months. We caught it in time to prevent major mold and helped the owner avoid thousands in water damage. Lintel Work Isn’t DIY—and It’s Not Optional Fixing a lintel isn’t like caulking a crack. It’s structural work. Done wrong, it can compromise the entire wall, and in some cases, the floors above it. We’ve had to redo too many jobs from other contractors who reused the same failing lintel or skipped basic weatherproofing steps. Our goal isn’t just to make the wall