How to Maintain Granite Countertops: A Complete NH Homeowner's Guide

Granite Is Tough — But It's Not Maintenance-Free

One of the most common misconceptions we hear from NH homeowners is that granite is completely maintenance-free. It's one of the most durable natural stone materials available, but "durable" doesn't mean "invincible." Granite is porous, and without proper sealing and care, it can stain, dull, and lose the finish you paid for.

The good news: maintaining granite properly requires very little time or effort if you build the right habits. Here's the complete guide.

Daily Cleaning: Keep It Simple

For everyday spills, crumbs, and cleaning, a soft cloth or non-abrasive sponge with warm water and a few drops of mild dish soap is all you need. Wipe, rinse, and dry. That's the entire routine for daily maintenance.

What to avoid: Acidic cleaners — vinegar, lemon juice, or anything with citric acid — will strip your sealant over time. Bleach-based cleaners and harsh chemical products like oven cleaners should never touch your granite surface. Abrasive sponges or steel wool will scratch the polished surface.

If someone in your household reaches for the vinegar-and-water spray bottle for kitchen cleaning, redirect that habit. It's excellent for glass and tile, but it's slowly damaging your granite.

Sealing: The Annual Ritual

Granite must be sealed to prevent liquid absorption and staining. We seal all granite surfaces at installation, but sealing is not a permanent treatment — it wears down over time and needs to be reapplied.

How often: Most granite should be resealed once per year. Some denser granites (particularly very dark stones like Absolute Black) may need sealing less frequently. Some more porous varieties may benefit from sealing twice annually.

The water test: Pour a small amount of water on your countertop and observe it for five minutes. If the water beads up and sits on the surface, your seal is intact. If the water darkens the stone and absorbs, it's time to reseal.

DIY vs. professional: Granite sealing is a straightforward DIY project. Clean the surface thoroughly, apply a quality impregnating sealer (available at any home improvement store), let it absorb for 15–20 minutes, wipe off excess, and allow to cure for 24 hours. Follow the product instructions carefully.

Handling Spills: Speed Matters

Even well-sealed granite can stain if spills are left sitting. Red wine, coffee, oils, and certain fruit juices are the most common culprits. The protocol is simple: wipe spills immediately. The longer a spill sits, the deeper it can penetrate.

For spills you didn't catch immediately, try a poultice — a mixture of baking soda and water (for oil-based stains) or hydrogen peroxide and a drop of dish soap (for organic stains). Apply to the stain, cover with plastic wrap, and leave for 24 hours. Lift the poultice and check the stain. Repeat if necessary.

If a stain doesn't respond to poultice treatment, professional stain removal is an option. Our team uses specialized drawing compounds to extract absorbed stains from natural stone.

Protecting Against Heat and Impact

Granite is genuinely heat-resistant — you can set a hot pan directly on the surface without damage in most cases. However, extreme thermal shock (moving from very cold to very hot rapidly) can theoretically cause cracking over time. Using trivets is a good habit and costs you nothing.

For impacts: granite is hard but brittle at thin profiles — particularly at cutout corners near the sink or cooktop. Avoid standing or applying heavy concentrated force near these areas. If you do chip a corner or edge, professional chip repair can restore the surface invisibly in most cases.

Questions? We're Always Available

We stand behind every countertop we install with post-installation support. If you have questions about your granite's maintenance, a stain that won't come out, or anything else, call us at 603-736-0004. We'd rather spend five minutes on the phone helping you than have you live with a problem that's fixable.