Cat 3 is our term for this type of water intrusion. This water contains contaminants that are not safe to touch or inhale.If you have a leaking upstairs toilet that has affected a downstairs ceiling, call A+. If you have had a sink, tub/shower, or toilet backup that has affected your cabinet, flooring, or walls call us ASAP. If you have had any outside water that has affected your exterior walls and interior of your home call us ASAP. We are available 24/7.g off the text-only areas of your page to keep your website interesting to visitors.