Greenfiber Cellulose | Environmentally Friendly | Green Insulation When it comes to insulation we at Showroom Partners have done it all. Installed most insulation types and sold them for nearly 40 years! Cellulose Insulation by Greenfiber is a great choice and widely used insulation that be be used to insulate a completely new constructed home or to retrofit existing homes. Visit Showroom Partners online for further information. #Greenfiber