The Blown-In Insulation is a process used commonly in new construction.
Netting is placed on the wall and insulation is blown into the cavity. This process can be done on exterior (sidewalls) walls and/or interior walls. Insulation on interior walls is typically used for sound-proofing.
The dense pack method ensures that even odd-sized wall cavities and spaces are filled with insulation creating a more thermally efficient barrier than with standard batt insulation.
Because the insulation is densely packed it creates a higher R-value than batt insulation, and reduces the infiltration of air and noise into the wall space.
A second hybrid option is available that brings together the benefits of blow-in-blanket and spray foam insulation. Because spray foam is used it creates a better seal on the exterior wall than any fiber insulation can provide but because it’s only a thin layer it is a high performance, cost effective insulation solution that can be applied in exterior walls, attics, cathedral ceilings, floors and many other applications.
A third option is flash and batt hybrid system which combines 1/2" or 1" closed cell spray foam with fiberglass.