During renovation, it’s not unusual to remove stone or concrete. For example, in the case of water leakage, a concrete floor in the basement may have to be partially removed to repair pipes. Or kitchen counters made of quartz or granite may be removed by sledgehammer. These are examples of instances where a property owner can unknowingly be exposed to silica. Particles of silica that become airborne during work activities can severely affect the health of the occupants. As a property owner, you should be aware of the dangers of silica and how avoid health hazards.
What is silica? Silica is a chemical compound made of silicon and oxygen atoms that occurs naturally in the environment. It is found in nature as quartz. Silica is the major constituent of sand.
Why would silica be found in my home? Materials such as sand, stone, granite, concrete and mortar contain crystalline silica. And it is used to make products such as glass, pottery, ceramics, bricks and artificial stone. So basically, any content, bricks or artificial stone in your house may contain silica. By itself and undisturbed, silica in a home does not pose any risk to humans.
When is silica harmful to humans? After a basement, shower stall, kitchen counters or some other area containing stone has been damaged by flood or water intrusion from damaged pipes, it may be necessary to remove the concrete or stone during the renovation process. Often without knowing it, a restoration company can endanger the health of occupants by jackhammering or using a sledgehammer to break up the concrete or stone without first protecting the space. Work activities on concrete or stone can create small particles of silica that are harmful to humans. According to the CDC, silica dust is made up of small particles that can become airborne during work activities with materials that contain silica. Particles that are small enough to be inhaled deep into the lungs are called respirable. Hazardous levels of respirable dust can be released into the air when working with materials that contain silica.
How can concrete or stone be removed safely? When cement or stone must be removed, the area should be isolated first, to protect dust from reaching other parts of the structure. Isolating the area creates a zone where any particles that are disturbed will remain in place while demolition is in process. This is similar to the removal of asbestos in a home. Once contained, the particles can be removed safely by experienced technicians wearing protective equipment. This will keep the dust from harming occupants.
What should I do if I suspect silica in my home or office? In most homes, it’s best to assume that silica containing materials are present. However, if you are not renovating or planning a renovation, you are safe. If a renovation following a water disaster becomes necessary, an inspection by a trained, certified, and experienced professional will put your mind at ease. Hiring a restoration contractor experienced in concrete or stone removal is critical. They can locate any silica in your home and determine how to proceed safely. Experienced workers follow the established safety protocols and wear required personal protective equipment.