Professional decontamination steps in when a space has been exposed to microorganisms, allergens, odors, or biohazards that regular cleaning cannot safely remove. Situations like sewage backups, pest activity, medical spills, or contamination in multi-unit NYC buildings often require a certified team to sanitize both surfaces and the air. GreenRoom Remediation uses EPA-approved disinfectants, HEPA-filtered equipment, and targeted fogging so hidden areas and high-touch surfaces are treated fully. Many property owners also request decontamination before reoccupying a space, preparing a rental for new tenants, or restoring a building after water or mold issues.