You may have heard of open-cell and closed-cell spray foams but are not quite sure of the difference. As spray foam insulation experts, we will make sure that we install the spray foam that fits the needs of your building, whether it be your family home or a commercial site. That said, our company is committed to offering the best customer service and we want you to be part of the decision. The Wichita Falls Foam Insulation team thinks it is important that you are knowledgeable of the materials that go into your home or commercial space and will guide you through the installation process, answering any doubts at any time. The main difference between open-cell and closed-cell spray foam is the density of the foam bubbles which causes a difference in their R-value, or thermal insulation capacity.
Open-Cell Spray Foam
Open-cell spray foam is, as its name describes, a spray foam with wider, or more open, cells. The material is the same as closed-cell spray foam, only less dense. Since open-cell spray foam is less dense than closed-cell spray from, it is a more flexible material that will mold to any space its placed on. The wider spaces between cells creates a air filtration system that allows the spray foam to breath, while being air-tight. Because of this characteristic, open-cell spray foam is best for hot climates where the outdoors is significantly hotter than the indoors, especially if there is AC indoors. Since open-cell spray foam breathes, it allows ventilation that will help keep a space cool. The R-value of open-cell spray foam is an average of 3.5, lower than that of closed-cell spray foam.
Closed-Cell Spray Foam
Unlike open-cell spray foam, closed-cell spray foam is denser since its foam cells are packed closer together. This characteristic causes closed-cell spray foam to be an excellent structure supporter, since it is less flexible than open-cell spray foam and will reinforce the shape of any structure. Since closed-cell spray foam cells are packed closer together, it acts as a vapor barrier, effectively preventing any water vapor from condensing within walls. Closed-cell spray foam is best for colder climates where outdoor temperatures drop below freezing point and indoor temperatures are heated. Without closed-cell spray foam, condensation could accumulate in between walls and cause mold. For that reason, closed-cell spray foam is best for colder climates. Since closed-cell spray foam is packed more densely, it has a higher R-value, at an average of 6.
To Keep in Mind