The methods for dealing with damage to walls depend on the type of materials and also what’s behind those materials. Drywall can often be salvaged, when you respond quickly to damage. You can purchase moisture meters that allow you to assess structural integrity. If the integrity checks out then your drying approach will depend on wall contents. If the wall has insulation, you will need to use flood cuts. If there is no insulation, then usually the best method is to create weep holes. And if you’re dealing with a firewall, you’ll want to use staggered cuts.
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.
Category 2 Water - Refers to a source of water that contains a significant degree of chemical, biological or physical contaminants and causes discomfort or sickness when consumed or even exposed to. Known as "grey water". This type carries microorganisms and nutrients of micro-organisms. Examples are toilet bowls with urine (no feces), sump pump failures, seepage due to hydrostatic failure and water discharge from dishwashers or washing machines.