Source: https://axaxl.com, March 14, 2019
Mold lives everywhere in air, in water, on land, in soil, and on or in plants and animals. All it needs to grow is the right temperature, moisture, and a nutrient source. Despite many harmless and beneficial molds, some molds can be toxic and pose very serious health threats to humans. That is why few want mold growing where they live or work. That’s why contractors, being the first gatekeeper in preventing a moisture intrusion, need to take appropriate precautions to prevent mold from getting a hold during construction.
Because mold “eats” or digests what it is growing on, it will gradually damage whatever it grows on. And that can be a problem for contractors. Much of the construction material used to build residences and commercial buildings in the US is composed of organic materials including particleboard, wood studs, wallboard and ceiling tiles. Under proper conditions, these materials are readily available food sources for mold, which may start to grow in a little as 24 to 48 hours. And once mold growth is established on such materials, it is often difficult to eliminate. Mold can even grow on the dust and dirt present on inorganic construction materials such as concrete, metal, and glass.
That’s not contractors’ only worry with mold. In addition to the structural damage that mold can do, indoor air quality concerns from elevated levels of mold reproductive structures (called spores) and mold metabolites (called mycotoxins) have been associated with causing a variety of adverse health effects in humans. The US Environmental Protection Agency (EPA) cautions that all molds produce allergens and irritants that can cause health problems under the right conditions. Often included in the list of toxic molds is Stachybotrys Chartarum, a greenish-black mold, which can grow on high cellulose, low nitrogen materials such as fiberboard, drywall, paper, dust and lint – in the presence of moisture. Its effects when airborne are particularly of concern for building occupants with impaired immune systems such as the very young, the elderly, and those individuals who are immune-suppressed.
If the health concerns and associated bodily injury claims aren’t motivation enough to control mold growth, construction firms should be concerned with the increase in legal actions against builders in which claimants allege faulty designs or construction defects have contributed to water intrusion and mold contamination. Jury awards have been significant in several cases. Claims activity is often driven by improper use and installation of products that trap moisture such as insulating systems, flashing and drainage systems, and wall coverings/vapor barriers.
Construction firms are wise to recognize the importance of preventing mold growth, from the start. Some proactive considerations should include:
Mold can be a nightmare for any contractor or their customers. It can delay sales of a property, delay a project, or prevent timely occupancy. Plus, it could add hundreds of thousands of dollars to the cost of a project. If claims and lawsuits result, there may be reputational risk and/or longer-term business impacts for contractors. Preventing mold growth is the best method of battling mold. Potential mold exposure and liability will continue to be a concern in construction as long as moisture sources exist, biodegradable building materials are used, and dust and dirt are present.
Given this fact, there are several best practices a construction firm can implement to prevent mold from becoming a very expensive problem. Download AXA XL’s latest Environmental Risk Bulletin– Preventing mold in construction– for more guidance.