Water Damaged Drywall Repair & Replacement in Boston

Water damage is one of the most common repair situations we encounter across Greater Boston — from roof leaks in Allston triple-deckers to pipe failures in Cambridge apartments. Here's how we handle it and why painting over water damage is never the right answer.

Why You Can't Just Paint Over Water Damage

Water-damaged drywall loses structural integrity. The paper face delaminates, the gypsum core becomes soft and crumbly, and mold can grow inside the wall cavity. Painting over it traps moisture and hides an ongoing problem. The stain almost always bleeds through paint — even multiple coats — without proper treatment.

The Right Process for Water-Damaged Drywall

First, verify the leak source is fixed. This is critical — we won't do a repair until the water source is resolved. Then remove all damaged drywall until we reach solid, dry material. Let the wall cavity dry completely — sometimes a few days with air movement. Install new drywall, tape, mud in proper coats, texture match, apply stain-blocking primer (Zinsser BIN or oil-based Kilz), then finish paint.

Mold Considerations

If we find mold in the wall cavity, we stop and advise the homeowner. Significant mold requires professional remediation before any drywall work. The EPA's mold remediation guidance recommends professional assessment for any mold covering more than 10 square feet. We refer Boston homeowners to licensed remediation contractors for significant mold issues before we proceed with repairs.