Recommended Maintenance

Follow these simple guidelines to maintain your GenStone

How to Take Care of Your GenStone

GenStone Products are some of the most durable building products materials available today for residential applications. In most cases, normal rainfall is sufficient to keep it clean. But if your GenStone Products should need cleaning, we recommend the following procedures. Particular attention should be given to areas under eaves, porches, awnings and other overhangs that have limited exposure to the natural washing effect of rainfall.

Moderate Atmospheric Dirt: We recommend an occasional washing with clear water using a garden hose and soft-bristled brush (a long-handled, car-washing brush is ideal for this purpose).

Heavy Industrial Atmospheric Dirt: Wash in the manner indicated above, but use the following solution:

  • 1/3 cup detergent or 1/3 cup dish soap (Tide®, for example)
  • 2/3 cup trisodium phosphate (Soilmax or Dirtex, for example)
  • 1 gallon water

Mildew Accumulation: Mildew can collect on surfaces of all types of building products and is often evident on surfaces that have not been properly cared for and maintained. Normally, mildew will appear as black spots. Mildew is easy to remove by using the basic cleaning solution above with the addition of sodium hypochlorite as follows:

  • 1/3 cup detergent (Tide®, for example)
  • 2/3 cup trisodium phosphate (Soilax®, for example)
  • 1 gallon water

Caulking Compounds, Tar and Similar Substances: Use mineral spirits in reasonable amounts and apply directly to the foreign substance. Immediately after cleaning, rinse the area thoroughly with water.


Do not exceed the recommended concentrations of cleaners. To do so can cause damage to the Product. Avoid skin and eye contact with the solution, and in all cases follow manufacturer’s instructions for the use of cleaning compounds and solutions. Avoid use of abrasive-type cleaners and strong solvents. Test any cleaner on an inconspicuous area before applying to major areas. To minimize streaking, always follow with a rinsing of clear water. Excessive scrubbing is unnecessary and can be harmful to the Products, and may cause undesirable look in areas over the finish.

Other Upkeep Suggestions

Pressure Wash: We recommend power washing or hosing off your GenStone at least once a year (unless you notice dirt and grime), when you do the rest of your home to get grime and build-up cleaned up. Some GenStone owners also use a mild detergent and soft dish brush to remove any resilient dirt or stains.

Landscaping: At GenStone we do recommend making sure your bushes, hedges and flowers are at least 6″ away from the stone paneling to avoid it being nicked by weed whackers and other landscaping hardware especially if you aren’t doing your own yard work.