There are several common types of insulation, including:
Batts and rolls, which are usually made from fiberglass or mineral wool and can be placed between wall studs and ceiling/floor joists.
Concrete block insulation, which protects the outside of concrete walls from significant heat loss.
Blown-in insulation, which is made from fiberglass, cellulose or mineral wool and can fill in irregularly shaped areas.
Spray foam, which has a high R-value and is great at stopping air from leaking through holes and cracks.
If you’re not sure which type of insulation you should install in your home, an insulation contractor can help you decide.