Rodents in Attic and Crawlspace

Author: Pacific Northwest Inspections Group, LLC   Date: 25-Nov-2013.   Category: Pest Rodents   Add to Favorites 

Signs of Vermin/Rodents -trails through/over the insulation, droppings, urine spots and nesting materials - are often signs of a rodent issue.  Vermin can gain access by tunneling beneath the foundation wall, through a poorly fitted hatch, damaged vent screens or by other means. We recommend yearly serice by a reputable exterminator to identify and seal all points of entry and eliminate any vermin present.

The Center for Disease Control (CDC) defines this as less than 20 feces per square foot. Rodent infestation may be a safety hazard due to the risk of contracting Hantavirus Pulmonary Syndrome (HPS). HPS is a rare (only 20-50 cases per year in the United states) but deadly (40% mortality rate) disease transmitted by infected rodents through urine, droppings, or saliva. Humans can contract the disease when they breathe in aerosolized virus. For example, from sweeping up rodent droppings. Recommend following guidelines in the CDC's Clean Up, Trap Up, Seal Up article for eradicating rodents, cleaning up their waste and nesting materials, and preventing future infestations. While Hanta virus is believed to survive less than one week in droppings and urine, specific precautions should be taken during clean up.

A qualified licensed abatement contractor or industrial hygienist could be contacted for clean up. If the infestation was minimal, clean up of rodent waste and nesting materials in non-living spaces (crawl spaces and attics) may not be necessary, or may be performed for aesthetic reasons only (odor and appearance).