What maintenance do granite countertops need in NB's climate?

Granite countertops in New Brunswick require sealing once a year, daily cleaning with a pH-neutral stone cleaner, and extra attention to moisture management because of NB's significant humidity swings between summer and winter. Granite is a natural stone with microscopic pores, and without proper sealing, it absorbs liquids, stains, and — in NB's humid Maritime summers — can harbour bacteria and even mold in unsealed areas near the sink.

Annual sealing is the most important maintenance task. A quality impregnating granite sealer fills the stone's pores and creates a barrier against stains and moisture without changing the surface appearance. The process is straightforward: clean the countertop thoroughly, apply the sealer evenly with a soft cloth, let it absorb for the time specified on the product (usually 15-20 minutes), wipe away excess, and allow 24 hours to cure before using the surface. One bottle of professional-grade granite sealer costs $20-$40 and covers a standard kitchen's worth of countertop. The best time to reseal in NB is early fall — after the humid summer and before the dry heating season begins — so the stone enters winter with maximum protection.

To check whether your granite needs resealing, drop a small amount of water on the surface. If it beads up, the seal is intact. If the water darkens the stone and absorbs within a few minutes, it is time to reseal. Some lighter-coloured granites and more porous varieties may need sealing every 6 months rather than annually.

For daily cleaning, use warm water with a pH-neutral stone cleaner or a few drops of mild dish soap. Wipe with a soft cloth or microfibre towel. Avoid acidic cleaners (vinegar, lemon-based products, and most bathroom cleaners) because acid etches granite's polished surface over time, leaving dull spots. Similarly, avoid ammonia-based glass cleaners and any product containing bleach.

NB Climate Considerations

New Brunswick's climate affects granite in ways that homeowners in more temperate regions do not experience. During winter, forced-air heating drops indoor humidity to 15-25%, which can cause the caulk joints between your granite countertop and the backsplash wall to dry out and shrink, creating gaps where moisture can penetrate. Inspect these joints each spring and reapply kitchen-and-bath silicone caulk if you see cracking or separation — a $10 tube of caulk prevents water from seeping behind the countertop and damaging the wall or cabinet tops.

In summer, when NB humidity climbs to 70-80%, moisture can condense on cooler granite surfaces, especially near exterior walls. Wipe down condensation promptly, and ensure your kitchen has adequate ventilation — a range hood that vents to the outside is essential.

Protect the surface daily by using cutting boards (granite dulls knives, and knife marks can chip the surface), trivets for hot pots (granite handles heat well but thermal shock can cause hairline cracks), and coasters under bottles of oil, wine, or citrus juice. Address spills of coffee, red wine, tomato sauce, or cooking oil immediately — blot rather than wipe to avoid spreading the stain. At $55-$110 per square foot installed, granite is a significant investment that rewards consistent care with decades of beauty and durability.

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Looking for experienced contractors? The New Brunswick Construction Network connects homeowners with qualified professionals:

• Gionetterenovations
• Thirty Four Renovations