Why Is There a Crack in My Drywall That Keeps Getting Bigger?

Water damage is a frequent reason for expanding drywall cracks. Leaky pipes, roof issues, or condensation can soften the drywall paper and compromise the gypsum core. As the material swells and dries repeatedly, it loses integrity. The crack widens because the wall board can no longer hold a stable shape, and the problem will continue until the moisture source is stopped.

Check for other signs like staining, a soft or spongy feel, or a musty odor. These clues point directly to water intrusion. In a Mediterranean climate with dry summers and winter rains, seasonal leaks after storms are possible. Addressing the leak promptly is crucial to prevent further damage and potential mold growth behind the wall.

Patching a growing crack with spackle or joint compound is a temporary fix. The underlying force causing the crack is still active, so it will simply reappear. The new patch lacks the flexibility to withstand the ongoing movement or moisture. You end up with a visible seam or a new crack right beside your repair work.

A permanent fix requires stabilizing the cause first. For moisture, this means drying the area and repairing the leak. For structural movement, it may involve foundation work or reinforcing framing. Only after the root issue is resolved should the drywall be patched, taped, and finished properly to blend with the surrounding wall.

• Hidden plumbing leaks inside walls or above ceilings.
• Roof leaks that allow water to travel along rafters.
• Poor drainage around the foundation causing soil movement.
• Seasonal humidity changes that make wood framing swell and shrink.
• Improperly installed drywall without adequate backing or fasteners.
• Previous repairs that did not address the initial problem.

If you find active water, significant structural movement, or simply cannot locate the source, it's time to call the pros. Local water damage pros have tools like moisture meters and thermal cameras to find hidden leaks. They can determine the extent of water damage and outline the necessary drying and repair steps to prevent mold.

For suspected foundational issues, a structural engineer or foundation specialist provides an assessment. They can tell you if the movement is serious. In either case, acting quickly protects your home's value and safety. If you live in Long Beach, dealing with moisture promptly is key to avoiding costly secondary damage in your living spaces.