Spray foam insulation expands as it comes into contact with the air and as it dries it hardens into a rigid state.
Spray foam insulation structural strength.
Why use spray foam vs.
Spray foam is a type of insulation that expands after you spray.
It is spray applied to a substrate and typically expands about 150 times its original volume to form a semi rigid flexible non structural plastic insulation.
Spray foam adds structural strength because of the second advantage.
Builders often turn to high density spray foam when high insulation values and strength are needed.
A wall with spray foam insulation has a higher racking strength or ability to maintain its shape under duress than a wall assembly without spray.
It protects the lining of your house and can even assist in the heating and cooling of your house during those unbearably cold or hot days.
Nahb has shown walls installed with closed cell spray foam have a racking strength up to 300 greater than walls without it.
As its name implies this foam has a denser structure than either of the other types of spray foam.
Touch n foam 2 component spray foam expands and touch n foam 2 component spray foam expands and cures quickly to fill cavities gaps cracks expansion joints and other sources of air leakage in a building envelope.
Open cell spray polyurethane foam also sometimes referred to as low density or 1 2 pound spf weighs between 0 4 and 0 6 pounds cubic foot when fully cured.
This spray foam is often an excellent choice for roofing or other exterior insulation because of its seamless monolithic nature.
Applying closed cell spray foam in the cavities of the walls increases durability of the wall system 3 because of the foam s ability to conform and adhere to the surface 4 upon which it is sprayed.
Since the insulation sticks to the building materials and hardens this rigidity is added to the building materials themselves.
Put simply wall assemblies installed with closed cell spray foam insulation outperform the other conventional wall assemblies.
The structural integrity of buildings.
The foam expands and seals deterring moisture which can create mold and pests from eating through your walls.