Spray Foam Insulation:
Spray Foam Insulation is developed from two types of composite materials: polyurethane and isocyanate. When combined, these two materials chemically react to each other and cause their combined substance to expand and harden. During the installation process, both materials are simultaneously sprayed from the tip of a spray foam gun. allowing them to expand and form a protective layer of spray foam insulation over the desired area.
Open Cell Foam Insulation:
Open cell is a type of foam where the tiny cells are not completely closed. open cell is less expensive because it uses fewer chemicals. It is a very good air barrier but does not to provide any type of water vapor barrier. It is much more sponge-like in apparence. It is ofen used for interior walls becaude it provides sound reduction by damping the movement of existing insulation. It is not recomended for outdoors applications.
Closed Cell Foam Insulation:
Closed cell foam insulation is a much more dense type of foam than open cell. It has a smaller, more compact cell structure. It is a very good barrier as well as water vapor barrier. It is ofen used in roofing projects or outdoors applications, but can be used anywhere in the home.