What is a chemical wash?
A chemical wash is a specialized sanitization treatment applied to surfaces and structures after severe hoarding or biohazard cleanup to neutralize odours, bacteria, and contamination.
After a major cleanout of a heavily hoarded space or biohazard site, residual odours and microbial contamination often remain embedded in walls, floors, and ventilation systems. A chemical wash addresses this problem by applying antimicrobial and deodorizing agents to affected surfaces and areas to break down odours at their source and kill bacteria, mold, and other harmful organisms that standard cleaning cannot remove.
The treatment typically involves spraying or fogging chemical solutions throughout the property, including hard-to-reach spaces like wall cavities, crawl spaces, and ductwork. These products work to neutralize ammonia, decomposition smells, and other pungent odours while also addressing health risks from urine, feces, mold, and decay that accumulate in severe hoarding situations.
A chemical wash is distinct from routine cleaning. It is a necessary follow-up step after a major hoarding or biohazard cleanout to restore indoor air quality and make a space safe and habitable again. Property owners, estate managers, and landlords typically arrange this service after bulk junk and waste removal is complete, especially when odours persist or contamination poses health concerns.