A critical part of any mold maintenance plan is to provide the technicians a historical summary of past issues and corrective actions so they may be aware of longstanding or unresolved issues during repairs. Unfortunately, some technicians skip this first stage until after they get a mold disassembled—and then they stop to research a problem whenever they see or feel something they don’t like.
Hurricanes and river flooding are common natural causes, as are high water tables and improperly graded ground. Installing a sump pump and water alarm are sensible preventions in areas with high water tables. The sump pump will pump water from under the foundation to drain it away from the home and averages about $1,200 to install. The sump pump itself will cost between $50 to $400. Also, ground that slopes towards the basement of the home can lead to leakage in the basement and increased stress on sewage systems.
The electrical systems in modern cars are particularly prone to flood water damage. Engine control computers, vehicle sensors, infotainment systems, and other electronic devices – along with wiring harnesses and the many connectors that join them together – can be very difficult to salvage. Unless every part is thoroughly cleaned and dried, inside and out, problems caused by corrosion can crop up weeks or even months after the flooding.
Assessing the severity of the damage is important for determining what is needed to start water damage repair and water removal. There are several different categories assigned to water damage. Category 1 refers to clean water, or water that does not pose a threat to humans. Possible causes of this type of damage include broken appliances or sink overflows. Category 2 water is also called gray water. This means that the water is contaminated and may cause sickness of ingested. This type of water contains microorganisms. Broken toilets, broken sump pumps, and seepage may cause category 2 water damage. Category 3 water is known as black water. This type of water is unsanitary, as it contains bacteria and other organisms that cause sickness. The possible sources of black water damage include sewage problems and contamination of standing water.
Steven Johnson worked as a toolmaker for 26 years, rebuilding and repairing multicavity molds for Calmar Inc. and then as mold-maintenance engineer for Hospira Inc., a medical device manufacturer. Today, he is the maintenance systems manager for Progressive Components and has his own business, MoldTrax in Ashland, Ohio, which designs and sells software for managing mold maintenance (www.moldtrax.com). He can be reached at [email protected] or (419) 289-0281. 
Unless you’re doing laundry, you probably don’t think twice about your washing machine. But if it breaks down, the results could be catastrophic. For example, if the supply hose is damaged or has a faulty connection to the wall or washing machine, more than 600 gallons of water could potentially spill out within an hour. That could lead to significant water damage, especially if your washing machine is located on the second floor of your home.
Mark the damaged drywall with a pencil after you determine the area of drywall you want to remove. Use a straightedge to mark lines vertically and horizontally on the face of the drywall. Whenever possible, have the lines fall over the centers of the framing members behind the drywall; this will provide backing and a fastening surface for the drywall patch.

Inspect the defects. To find the source of the defects, we perform a visual inspection as high as 24x magnification, use dye-penetrant inspection (DPI), or use fluorescent penetrant inspection (FPI). This allows us to find small pits, microscopic cracks and larger cracks in the gate. If these defects are not identified and repaired, more problems can arise for the gate and the mold.

Roofs. Keep roofs free of debris that can damage roofing and allow water to seep in. Trim tree branches to prevent them from rubbing and damaging the roof. Repair missing or damaged shingles. Properly seal any cracks around chimneys, skylights, and vents. Check metal flashing for holes, cracks, or other damage. Replace flashing or use silicone caulk to seal any openings.
If you’re dealing with anything other than a large incursion, you understandably may be considering handling the cleanup and drying yourself to save money or time. The problem is that cleaning up and recovering from water damage isn’t always as straightforward as it seems. This post highlights 3 key things you need to be aware of when addressing water damage from a minor clean water (or Category 1) incursion.
Category 3 Water - Known as "black water" and is grossly unsanitary. This water contains unsanitary agents, harmful bacteria and fungi, causing severe discomfort or sickness. Type 3 category are contaminated water sources that affect the indoor environment. This category includes water sources from sewage, seawater, rising water from rivers or streams, ground surface water or standing water. Category 2 Water or Grey Water that is not promptly removed from the structure and or have remained stagnant may be re classified as Category 3 Water. Toilet back flows that originates from beyond the toilet trap is considered black water contamination regardless of visible content or color.[6]