The short answer
How Water Damages Stone
Stone countertops are naturally porous, but the level of porosity varies widely. Marble and limestone absorb water readily, which can cause dark water rings, mineral staining, and even weakening of the stone structure over time. Granite is denser and more resistant, but it is not completely waterproof. Water can penetrate through tiny cracks, pits, or the seams where slabs meet.
The source of the leak matters too. Clean water from a pipe leak may only cause temporary discoloration if dried quickly. However, water from a dishwasher or refrigerator line can carry food acids, detergents, or minerals that etch the stone's polish. Standing water on the surface for hours increases the chance of permanent damage, especially on softer stones.
What You Can Do Right Now
Your first step is to stop the water source if you can do so safely. Turn off the water supply valve for the appliance or pipe that is leaking. Then, blot the countertop with a clean, dry cloth or paper towels. Avoid rubbing, which can push water deeper into the stone. Use a dry cloth to soak up as much moisture as possible.
After blotting, allow the surface to air dry completely. Do not use heat guns, hair dryers, or direct sunlight, as rapid temperature changes can crack the stone. If the water came from a clean source, you may see the discoloration fade as the stone dries. For stubborn spots, a stone-safe cleaner can help, but avoid acidic or abrasive products that can etch the finish.
- Turn off the water supply valve for the leaking appliance or pipe.
- Blot the surface gently with a dry cloth; do not rub.
- Let the countertop air dry naturally for 24 to 48 hours.
- Use only pH-neutral stone cleaners if needed.
- Check the area under the counter for signs of water pooling.
- Keep a record of the leak for your insurance claim.
When Professional Help Matters
If the water has seeped into the seams, under the countertop, or into the cabinet below, the damage may extend beyond the visible surface. Water can weaken the adhesive holding the stone, cause the underlayment to swell, or promote mold growth in hidden areas. In such cases, you need a professional assessment to determine the full extent of the damage.
Local water damage pros can use moisture meters to detect hidden moisture and structural drying equipment to remove it safely. They can also advise whether the stone can be refinished or if a replacement is needed. For severe leaks, especially those involving contaminated water, the pros may recommend removing the countertop to dry the subfloor and prevent further issues.
Repair Options for Stone
If the stone is only stained, a professional stone restorer can often polish out light etching or use poultices to draw out deep stains. For cracks or chips caused by water damage, epoxy fillers matched to the stone color can be applied. However, these repairs are not always invisible, and the stone may need to be resealed afterward.
Prevent Future Leak Damage
A sensible way to protect your stone countertop is to prevent leaks in the first place. Regularly inspect the water lines under sinks and behind appliances for signs of wear or drips. Check the sealant around your sink and countertop edges for gaps. Keep your shutoff valve location written down so you can act quickly in an emergency.
Consider installing a leak detection system that alerts you to water presence before it causes extensive damage. These systems can be placed under the sink or near appliances. Also, always wipe up spills immediately and never let water pool on the surface for extended periods. These simple habits can save you from costly repairs or replacement.
- Inspect water lines and connections monthly for drips or corrosion.
- Reapply stone sealer as recommended by the manufacturer.
- Install leak detectors under sinks and near appliances.
- Wipe up spills immediately with a dry cloth.
- Avoid placing hot pans directly on the stone to prevent thermal shock.
- Know the location of your main water shutoff valve.
Talk to someone now
Water keeps spreading into floors and walls, so it is worth acting early. Calls are answered 24/7.
Call Now (801) 383-0232Frequently asked questions
Can a water stain be removed from my stone countertop?
Sometimes, yes. If the stain is fresh and from clean water, drying the stone may make it disappear. For stubborn stains, a poultice paste can draw out the moisture. If the stone is etched or cracked, you may need a professional stone restorer to polish or fill the damage.
How long does it take for stone to dry after a leak?
Drying time varies based on stone porosity, humidity, and the amount of water. Surface drying can take 24 to 48 hours, but deeper moisture may take days or weeks. The pros use dehumidifiers and airflow to speed up the process and prevent secondary issues like mold.
Will my insurance cover the countertop damage?
Policies vary, and your insurer decides what is covered. Homeowners insurance often covers sudden, accidental water damage from plumbing leaks, but not gradual issues or lack of maintenance. Check your policy and document the damage with photos and receipts to support your claim.