Granite is one of the most durable natural materials on earth, and a properly installed monument will last for centuries. However, regular cleaning and basic maintenance help your memorial look its best and prevent the accumulation of biological growth, mineral deposits, and environmental staining.
For routine cleaning, the simplest and safest method is warm water and a soft brush. A soft-bristled nylon brush or a natural sponge works well for removing surface dirt, pollen, and dust. Avoid wire brushes, steel wool, or abrasive pads, as these can scratch the polished surface. Rinse the monument thoroughly with clean water after brushing. For slightly more stubborn dirt, a few drops of non-ionic dish soap in warm water provides gentle cleaning power without leaving residue or damaging the stone.
Biological growth — including algae, lichen, moss, and mildew — is the most common maintenance challenge, especially in humid or shaded locations. For light biological growth, a solution of one part household ammonia to four parts water applied with a soft brush is effective. For heavier growth, specialized monument cleaning products are available from monument supply companies. These products are formulated specifically for natural stone and are safe for polished granite. Never use bleach, acid-based cleaners, or pressure washers on a granite monument, as these can etch the surface, damage the finish, and accelerate deterioration.
Seasonal maintenance is straightforward. In autumn, remove fallen leaves and organic debris that can trap moisture against the stone and encourage biological growth. In winter, avoid using salt or de-icing chemicals near the monument. In spring, give the monument a thorough cleaning to remove winter accumulation. Summer is a good time to inspect the monument for any signs of settling, shifting, or joint separation between the base and die.
If your monument develops stains from hard water, iron deposits, or other sources, consult a professional monument company before attempting removal. Some stains require specialized poultices or treatments that are best handled by experienced technicians. With basic care and attention, your granite monument will remain a beautiful and dignified tribute for generations to come.