Natural Stone & Marble Installation

Understanding stone types and characteristics

Marble has dramatic veining but can etch from acids like lemon juice or vinegar. Travertine and limestone have a warm, earthy look and open pores. Slate and granite are harder and more stain resistant. Stone varies in color and pattern from piece to piece, so installers blend tiles from several boxes. Visit a supplier to see slabs or large samples, and ask how the stone will look when wet and when sealed. Visit the supplier with the installer and choose pieces from several boxes, so color and veining blend across the floor instead of changing room to room.

Setting stone correctly

Stone is heavy and sensitive to flexing, so the substrate must be stiff and flat. White thinset prevents staining in light stones, and the right trowel and technique ensure full support. Joints are kept small and filled with grout compatible with the stone. Some stones need back-buttering and careful handling to avoid chips. Expect more time than porcelain tile because of the care in layout and finishing. Ask about stain protection for kitchens and bathrooms, and avoid acidic cleaners on marble, limestone and travertine since they dull and etch the surface.

Sealing, cleaning and maintenance

Most natural stones need to be sealed to resist stains and need to be resealed on a schedule. Use pH-neutral cleaners and avoid acids. Wipe spills quickly, use mats at entrances and place trivets under hot items on counters. Honing or polishing can restore a worn surface. Ask the installer about maintenance products and a care schedule, and keep any extra stone for repairs. Keep the stone supplier’s lot number and a few spare pieces, because matching natural stone years later is difficult once the quarry batch has changed.

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