Bad Air BNB guests: Raccoons
If there has been raccoon activity in an attic, there are two parts to the remediation. Firstly the animals should be removed by professional wildlife control people, and entrance holes should be covered.
Part two is to check for contamination and damage within the attic. Raccoons will set up bathrooms, often directly on top of the attic hatch as shown in the photo. Raccoon feces can be dangerous stuff, so caution is required for anyone entering the attic.
Raccoons are strong animals that can tear through vapour barrier and cladding materials inside the attic. If bathrooms have been established on drywall where there is no polyethylene vapour barrier, that drywall may have to be replaced. Raccoons have a preference for sheltered locations for their bathrooms, such as lowered ceilings above bathroom showers and baths, and the attic hatch.
Their travels through the attic will compress and displace insulation, so insulation will have to be redone. Often the entire attic area has compressed insulation.