A: The easiest way to reassure yourself about indoor air quality is to measure it using an inexpensive indoor air quality monitor. Ours is from Foobot but there are many others. Our indoor air quality is consistently excellent. Our insulation is a mixture of fiberglass and ISO board panels which are essentially spray foam in a board. I do not know of any indoor air quality issues arising from any of the common types of insulation like fiberglass, cellulose, spray foam, ISO board or rockwool. Concerns over off-gassing from insulation usually relate to urea formaldehyde foam insulation. The use of this was banned in the USA in 1982.