This study is exploring how low- to moderate-cost interventions can alleviate the impact of high temperatures and humidity in ready-made garment factories in preparation for further climate change. It compares the use of green or white roofs and actively-managed fan-assisted cross-ventilation, compared to no interventions and air-conditioning. Climate-controlled chambers, computer-based modelling temperature monitoring, and worker interviews will be used to explore perceptions of discomfort caused by heat. Findings will help estimate when it will be necessary to invest in interventions and how effective they can be.