I watched a crew install a blown fiberglass product: they stapled fabric over the walls, poked holes in it, and stuck a hose in each hole so a machine in their

I watched a crew install a blown fiberglass product: they stapled fabric over the walls, poked holes in it, and stuck a hose in each hole so a machine in their truck could flow fiberglass into the cavity. It went very quickly and fully filled the cavities. John Mansville Spider Plus looks like another interesting product — blown fiberglass that is just sticky enough that it can supposedly be applied to walls and even ceilings without anything to contain it.