Santa Fe Floor Care


Pressure Washing Caution

The Dangers of Pressure Washing Stone and Masonry Surfaces

Are you a property owner or manager looking for a cleaning solution for dirty concrete and sidewalks, oily driveways, and other sullied surfaces? You may have considered pressure washing, which is a fast and easy way to clean such surfaces, but be warned, when it comes to stone and masonry, pressure washing can cause damage. Anyone can purchase a pressure washer and claim to be qualified to clean exterior stone and masonry. One should always opt to consult with a professional stone restoration contractor for safe, lasting results.

Over-saturation Can Cause Efflorescence

Pressure washing can remove the natural protective patina of stone and masonry surfaces. It will also remove any coating or sealers. This opens up the pores in the surface, allowing water to seep deep into the stone or masonry. The higher the pressure, the more water the stone or masonry will consume, and the more saturated it will become. Over-saturated stone or masonry can cause a condition known as efflorescence, a white powdery residue that accumulates on the surface. This powder consists of salts originating from the stone and the setting material. The salts are dissolved from the water and deposited on the surface. In many cases the salts will deposit into the pores without making their way all the way to the surface, causing pitting, flaking and delamination.

Scarring by zero tip pressure washer
Scarring by zero tip pressure washer


In order to get difficult soiling removed, many contractors will intentionally not place tips on their pressure washers. This can cause severe scarring of the surface. It is easy to recognize scarring by deep patterns carved into the surface of the stone or masonry.

Damage caused by chemical application
Damage caused by chemical application


In addition to pressure washing, unqualified contractors often use inappropriate chemicals in an attempt to help remove the soiling. These chemicals are applied before and during the pressure washing process. The chemicals can be driven deep into the stone with the high water pressure, causing etching and other damage. Common chemicals are acids, bleach, and high alkaline cleaners, which if not applied and neutralized properly, can cause irreversible damage.

Missing grout
Missing grout

Missing Grout and Point

Grout on interior surfaces and point on exterior surfaces can be removed by pressure washing. Grout and point can become soft, weak, and crack with age. Using a pressure washer accelerates this process through over-saturation.

The Proper Use of Pressure Washing

Not all pressure washing is damaging, and if done properly, it can be a good cleaning solution. If you intend to have anyone other than a professional stone and masonry restoration contractor use a pressure washer on your surfaces, you, or whoever performs the cleaning, needs to be aware of the following:

  • The surface to be cleaned should be inspected and evaluated to determine the softness of the material.
  • Grout and point should be examined carefully before washing.
  • Never use a pressure washer over 1000 PSI.
  • Never use a zero-point tip. Only fan tips should be used.
  • Do not use bleach, acids, or high-alkaline chemicals on stone or masonry surfaces.
  • The pressure washing tip should be at least 12 inches from the surface of the material being cleaned.

In order to avoid damage, it is best not to do your own pressure washing or to hire a pressure washing company to clean stone or masonry. Save yourself the trouble and consult with a professional stone and masonry restoration contractor.

This article written by Fred Hueston, Chief Technical Director for SurpHaces, is one of a series of articles of SurpHaces and published on behalf of SurpHaces PRO Partners.

Limiting and Eliminating Carpet Grease

Cooking grease is easily and invisibly tracked through the home from the kitchen and onto carpets by people and pets—and cannot be vacuumed away. Here are a few tips for limiting and eliminating grease.

Prevention: Modify Cooking Methods

Try increasing your use of alternatives to frying, such as boiling, broiling, crock pot, or other cooking methods. When you do fry, use a splatter guard or lid on your pan, lower your cooking temperature, and use high-temperature-friendly oils or fats.

Removing a Grease Spot on Carpet

If you have a grease spot from a spill, you may be able to clean it using DIY methods. First, remove any excess grease using paper towels, and if necessary, the flat edge of a dull knife. Sprinkle some baking soda on the grease and allow it to remain for an hour or longer. The baking soda will absorb excess grease. Vacuum the baking soda off the carpet. Mix mild, bleach-free, alkali-free detergent and warm water. Use two clean, absorbant, white rags, one to apply the detergent, and the other to absorb the detergent. Blot the spot, and do not rub it. Rubbing will only spread the grease to clean carpet fibers. Repeat this process until the spot is removed. For stubborn grease spots, use a dry cleaning solvent or a protein enzyme like laundry detergent or OxiClean.

Professional Carpet Cleaning Removes Grease

If you have a thin layer of grease over a wide area of carpet, or if your DIY spot removal methods failed, then it is time to contact your professional carpet cleaner. Professional carpet cleaning solutions and equipment achieve a deep level of clean not possible with regular vacuuming, spot removal methods, or using a rented carpet cleaning machine. If you do not have a professional carpet cleaner, contact us. We will safely and effectively get the grease out and leave your carpets clean and fresh.

This is one of a series of articles written and published on behalf of SurpHaces PRO Partners.