To purify a second-hand home before renovation, prioritize mold assessment and remediation using HEPA vacuums and encapsulation materials. Test for lead paint and hire certified professionals for safe removal. Deep clean surfaces with disinfectants, replace HVAC filters, and conduct air quality testing post-renovation.

Mold and lead paint pose significant health risks if improperly addressed. Mold exposure can trigger allergies, asthma, and respiratory infections, with the EPA estimating that 50% of indoor air quality issues stem from mold growth. Lead paint, prevalent in homes built before 1978, can cause developmental delays and neurological damage in children. The CDC reports that lead poisoning accounts for 3.5 million cases of child health issues annually in the U.S. Professional remediation reduces these risks by ensuring mold spores are contained and lead particles are safely removed, preventing long-term health consequences. Deep cleaning eliminates residual microbes, while HVAC upgrades improve air circulation and filtration efficiency. Air quality testing post-renovation verifies compliance with EPA standards, guaranteeing a safe environment. According to a 2021 ASHRAE study, proper ventilation reduces airborne contaminants by 60-80%, underscoring the importance of these steps. Combining expert assessment, targeted remediation, and rigorous cleaning creates a healthier, safer space for future occupants.