Professional Water-Damaged Drywall Repair in San Jose

November 11, 2025

It’s a sight no property owner wants to see: a dark, bubbling paint stain on the wall or a discolored patch spreading across the ceiling. Water damage. Here in the Bay Area, whether from a winter storm or a plumbing leak, it's a high-stress problem.


The first instinct is often to find the quickest, cheapest fix.


"Can't I just paint over it?"


We hear this all the time. It’s a tempting thought—grab some stain-blocking primer, cover it up, and pretend it never happened. Unfortunately, this "quick fix" is one of the worst things you can do. It's like putting a small bandage on a serious wound. You're not fixing the problem; you're just hiding it while it gets worse.

The Dangers of Painting Over Water Damage

Painting directly over a drywall water stain or bubbling paint is a costly mistake. Here’s what’s really happening when you just cover it up:


  1. You Trap Moisture: Even if the source of the leak is fixed, the drywall and framing behind it are likely still damp. Sealing this moisture in with primer and paint creates a perfect, dark, damp environment—an open invitation for mold and mildew to thrive inside your walls.
  2. The Drywall is Compromised: Water saturation destroys the structural integrity of gypsum (drywall). The material becomes soft, crumbly, and weak. Painting over it won't make it strong again. Over time, it will continue to bubble, peel, and potentially even collapse.
  3. The Stain Will Return: Those persistent water stains are notoriously difficult to cover. Even with the best primer, the stain will often "bleed" back through the new paint weeks or months later, leaving you right back where you started.
A before and after comparison of a professional drywall water damage repair.

The Professional Process: How to Fix Water-Damaged Drywall for Good


A true repair isn't about covering up; it's about removing the damage and rebuilding the surface. When our team handles a water damage repair in a Bay Area office or home, we follow a process that ensures the wall is not just painted, but properly restored.


Here are the steps we take, and what you should expect from any professional you hire:


Step 1: Assess and Remove All Damaged Material

First, we ensure the source of the leak has been completely repaired. Then, we cut away and remove all compromised sections of the drywall. We don't just patch over the stain. We cut back to clean, dry, and stable material. This is the only way to ensure we're not trapping any mold or soft drywall inside the wall.


Step 2: Patch with the Right Materials (Hot Mud)

For deep patches and repairs, we use a setting-type compound, often called "hot mud." Unlike standard, air-drying joint compound, hot mud sets chemically. This means it dries harder, faster, and is much more resistant to shrinking and cracking. It creates a durable, seamless patch that becomes just as strong as the original wall.


Step 3: Prime the Patch (The Most-Skipped Step!)

Once the patch is sanded smooth, we apply a high-quality primer. This step is critical. The new, porous patch material will absorb paint differently than the surrounding wall. Priming seals the patch, preventing a "flashing" or "blotchy" look in the final finish. It ensures the new paint will have a uniform, even sheen.


Step 4: Apply Two Coats of Finish Paint

Finally, we apply two full coats of your finish paint. This ensures complete coverage, a durable finish, and a flawless blend between the old wall and the new repair. The result? You'll never even know the damage was there.

Need Help with Drywall Repair in the Bay Area?


Spotted a water stain on your wall? Don't wait for it to get worse. Our team is here to handle the entire repair, from patching the drywall to the final, flawless coat of paint.


We are experts in commercial and residential drywall repair and painting, working after hours and on weekends to minimize disruption.


Contact us today for a professional assessment. Let's get your property back to perfect condition.

Contact Us

Exterior view featuring a two-tone stucco and stone veneer
January 13, 2026
managing a large-scale apartment repaint doesn't have to be a headache. See our proven 7-step process for minimizing disruption and maximizing transparency.
Pro-Industrial Waterbased Epoxy
January 5, 2026
Pro-Industrial Waterbased Epoxy creates a chemical-resistant surface where rust simply wipes away.
December 16, 2025
Graffiti on a commercial property is more than just a nuisance—it’s a signal.
Freshly painted exterior of apartment complex at San Jose by Commercial Painting Inc
December 9, 2025
Boost tenant retention with professional exterior painting. See our latest transformation at 3218 Impala Dr. in San Jose and learn how maintenance adds value.
December 2, 2025
Is your facility strategy reactive or proactive? Learn why annual painting maintenance plans save money, reduce downtime, and protect commercial assets better than full repaints.
November 17, 2025
Here in the Bay Area , our buildings face a unique set of challenges. From the persistent fog and moisture in the city to the strong sun in the valleys, our properties are in a constant battle with the elements. It’s easy to look at the resulting peeling paint, a dirty facade, or a small spot of rust as a cosmetic problem—something to "clean up" when you have the time or budget. At Commercial Painting Inc., we’ve seen what happens when "upkeep" is put off. That small rust spot becomes a major corrosion problem. That peeling paint lets moisture in, damaging the material underneath. What was a simple maintenance task becomes a costly, large-scale repair. This is why we believe maintenance matters. We're passionate about making the Bay Area prettier through paint, but we know "pretty" doesn't last unless it's built on a strong foundation.
Show More