SPRAY IT:
Spray cellulose fills stud cavities completely, sealing off most air leaks and
preventing convection within the wall.
Cellulose insulation is made by a milling
process that grinds together two
raw materials: paper stock and chemicals.
The chemicals are fire retardants,
corrosion inhibitors, and, in the case of
spray products, adhesives and wetting
agents.
There are two major types of cellulose:
loose-fill and sprays. Loose-fill is
blown into attics and existing closed
walls. Cavity spray is applied to open
framing bays in new or existing
construction.
The cellulose used in residential cavity
spray generally has a dry adhesive
that is activated with water at the time it
is installed. It also has a chemical called
a reactant, which lets