When can spray polyurethane foam insulation be installed?
Spray polyurethane foam insulation is professionally installed at the same point in the construction cycle as other types of insulation. That is, it should be installed after the rough plumbing, electrical wiring, and heating and air conditioning ducts have been installed, but before the interior walls are completed in new construction. In some cases SPF can also be applied in older buildings or structures, to the inside of roofs, and under floors after construction has been completed.
