During and immediately following spray foam applications, fumes and mists are generated that can be hazardous to your health. Access to the work area during this time should be restricted to personnel wearing appropriate personal protective equipment (PPE). An example of PPE is a respirator. Furthermore, this area should be restricted to those whose job responsibilities require them to be in the area.
The application of spray foam can produce hazardous levels of airborne chemicals during and just after installation. These chemicals will degrade into non-hazardous compounds in a few hours when combined with moisture in the air. Because of these short-term airborne levels, re-occupancy of the work area by other trades or building occupants is typically 24 hours. However, specific re-occupancy time may vary depending on the type of material, the volume of mists and fumes generated, building size and rate of ventilation. Your contractor and their supplier can recommend re-occupancy times based on job-specific conditions.
