Can Granite Countertops Be Damaged by Water?

Granite is a natural stone that is dense but not completely waterproof. The surface is usually sealed to keep liquids from penetrating, but that sealant wears down with regular use and cleaning. Once the seal weakens, water can soak into the microscopic pores and crevices.

When water gets in, it can leave dark, blotchy stains that look like wet spots. If the water contains minerals or acids, like from lemon juice or vinegar, it can etch the surface and dull the polish. Over time, repeated exposure can weaken the stone and lead to small cracks or chips.

Wipe up spills right away, especially acidic ones like wine, coffee, or citrus. Use a gentle, pH-neutral cleaner and a soft cloth to avoid scratching the surface. Avoid harsh chemicals or abrasive pads that can strip the sealant and damage the stone.

Reseal your countertops regularly, usually every one to two years depending on use. You can do this yourself with a store-bought stone sealer, following the instructions on the bottle. If you're unsure about the condition, a local water damage pro can inspect the area for hidden moisture issues.

Here are answers to common questions about water damage on granite countertops. Each one covers a specific concern you might have when dealing with a spill, a stain, or a leak.

If your question isn't listed, remember that the key is to act quickly and keep the stone sealed. For more serious issues, a professional inspection can reveal whether water has traveled beyond the countertop surface into the surrounding structure. Staying proactive helps you avoid bigger repairs later.