You can be in the home but should stay out of the spray-zone for 4 hours after each lift. Most homeowners leave the house for the install day. The chemical odor dissipates within 24 hours.
More detail
During spray, the work area is restricted (PPE required) and the rest of the home is typically livable but with elevated chemical odor (off-gassing from the curing reaction, though the chemicals are not toxic at the levels reached). Most Cincinnati local install teams recommend the homeowner and pets vacate the home for the spray day, returning after the crew has packed up and the work area has ventilated for 2-4 hours. Re-entry guidelines: 4 hours after final lift in any room before light occupancy, 24 hours before sleeping in foamed rooms, 48 hours before strenuous use. The chemicals fully cure within 24 hours; persistent odor beyond that timeline indicates an off-ratio mix and should trigger a service call. Pet considerations: cats and small dogs are more sensitive to the curing odor than humans; arrange off-site care for the install day plus 24 hours after. Cincinnati pet-care planning: arrange off-site care for pets on install day plus the following 24 hours. Local install teams work hard to limit chemical-odor exposure but the curing reaction does produce mild detectable odor for the first 24 hours that pets (especially cats and small dogs) tolerate poorly. Boarding for 1-2 days, or asking a neighbor to host the pet, is the typical solution.