Do Not Patch Until You Know What Is Above It
Ceiling cracking after a water leak in a Las Vegas home is caused by the drywall absorbing water, softening, and then contracting as it dried. When water-saturated drywall dries unevenly which happens when the surface dries faster than the core in the dry Las Vegas air the material stresses internally and cracks along joints and at the paper face. The crack itself is not the problem. The question is whether the ceiling material and the assembly above it are actually dry or simply dry-looking on the surface.
Patching a cracked ceiling before confirming the assembly above is dry creates problems. If moisture is still present in the insulation or framing above and patching seals the ceiling surface, the moisture continues working and mold can establish in the assembly without any visible indication from below. When the smell develops weeks later, the repair has to come out anyway along with the affected materials above.
What to Check Before Patching
Moisture metering of the ceiling drywall to depth, thermal imaging of the ceiling plane to identify any remaining elevated moisture, and visual inspection of the assembly above through the cracked area are the right steps before any repair work begins. In Las Vegas summer heat, insulation above a wet ceiling can appear dry on the surface while retaining moisture deep in the batt. A homeowner in Paradise patched a cracked ceiling without checking above it. Three months later the patched area showed new cracking and a musty smell. The insulation had never been replaced and was still holding moisture.
What We Do
We assess the full moisture condition of the ceiling assembly before making any recommendation about repair scope. If the assembly is genuinely dry, the crack is cosmetic. If moisture remains, we define the remediation scope. Read more about our water damage restoration service. Call (702) 442-1126.