Abstract
Indoor air quality (IAQ) is a crucial factor in determining patient recovery, staff productivity, and overall health outcomes in healthcare facilities. This study examines the role of sustainable building materials in improving IAQ in hospital buildings within Ikorodu, Lagos. Data were collected through structured questionnaires administered to hospital staff and observational assessments of building materials, finishes, and moisture-related conditions. Findings reveal persistent IAQ challenges, including unpleasant odours, uneven ventilation, and minor mould growth in moisture-prone areas. Staff perceptions suggest that material selection is crucial for air quality; however, statistical analysis revealed no significant direct association between material type and IAQ satisfaction. Observations highlighted a mixture of sustainable and conventional materials, with the most sustainable use in critical areas like the ICU. The study concludes that sustainable materials enhance IAQ only when combined with effective ventilation, regular maintenance, and moisture management strategies. An integrated approach to material selection, operational practices, and environmental design is therefore essential for creating healthier hospital environments in humid tropical climates.