Without exception, it’s vital for Spray Polyurethane Foam (SPF) insulation professionals to realize that building reoccupancy should always be restricted until any spray foam that was installed has cured – or fully reacted) – and the home or building has been properly ventilated and meticulously cleaned.
In general, reoccupancy time is dependent upon a number of factors, including SPF formulation, the amount of foam applied per volume of space, temperature, humidity, the degree of ventilation and several other variables.
At Intech Equipment and Supply, we tell contractors that to determine a safe reoccupancy time for unprotected workers and building occupants, decision makers should always exercise caution and consult their SPF contractor for specific guidance prior to the SPF installation.
Furthermore, they should always request to see any reports developed from product testing on reoccupancy times, as well as the affect of the factors that influence curing variability. We also suggest reading the manufacturer’s recommendation in the material safety data sheet (MSDS), which can be obtained directly from the manufacturer.
Most importantly, when determining a safe reoccupancy time, it’s important to take into consideration vulnerable populations, including small children, people with asthma and pets.
The bottom line: reoccupancy time ultimately depends on curing time, which can vary depending on a number of factors. Per the EPA and manufacturer estimates, reoccupancy time for two-component high-pressure SPF applications is at least 24 hours, and can be as long as 72 hours. For one-component low-pressure SPF applications, reoccupancy can take place after approximately eight to 24 hours.
Intech Equipment and Supply, founded in 1995, is a full service spray foam equipment and related parts supplier. Our online store features an array of industry manufacturers, providing the best in trusted industry equipment and backed by our expert service, with easy online ordering. Shop equipment for spray foam insulation, spray foam equipment parts and turnkey mobile spray foam rigs, as well as traditional roofing equipment and safety equipment.