About Open Cell Spray Foam Insulation

What is Open Cell Spray Foam?

Open-cell spray foam, a low-density polyurethane foam, provides a custom-fit air barrier. The foam expands instantly to fill every crevice and nook when applied. Open-cell foam is excellent at absorbing sound and creating a comfortable indoor environment. The majority of open-cell foam is used on above-ground walls, ceilings, and the undersides of roofs.

The open-cell spray foam in nature is very similar to the closed-cell version. But it does have a lower R-value. Open-cell foams have an R-value of between 3.6 and 3.8 per inch. Closed-cell spray foams are typically above 6.0 per inch.  

Open-cell foam expands as soon as it is applied. This makes it an ideal choice for difficult to reach places. Open-cell foam can be used to fill in those nooks and crevices.

Can Open Cell Spray Foam Get Wet?

Yes, there are open cell spray foams on the market that will absorb water, but that doesn’t mean they all do. 

Spray foam insulation can get wet easily. It is possible to wonder if the entire thing should be thrown away. It is possible to get damp spray foam insulation back.

Spray foam that has been wet will eventually dry again. Spray foam that has been wet for a long time is more likely to crack and expose insulation. Spray foams that are subject to water deformation would need a lot of water.

When To Use Open Cell Spray Foam

The insulation is effective in blocking heat transfer and has a R-value between R-3.5 and R-3.7 inches. Because it has a lower density, it is able to seal around the perimeter and edges of stud cavities as well as any penetrations with a flexible method. Open cell insulation has many other advantages. This lighter, flexible, and softer makeup is one of them. Acoustic control is improved in wall assemblies, thanks to its sound-absorptive qualities, which are greater than rigid insulation. Its vapor permeability allows water to pass through the wall assembly, so it can dry towards the exterior and interior as desired. It is not a material that can be used to grow mold. Open cell spray foam insulation is usually more affordable than other insulations in terms of labor and materials.

Low-density open cell spray insulation is suitable for many commercial building envelope applications. It can be used on exterior walls, roof/ceiling assemblies and roof/ceiling assemblies. Because of its inherent airtightness, it can expand the possibilities for better performance than rigid or fibrous board insulation options. This is especially true for unusual locations like cathedral ceilings and cantilevered floors, arches, unconditioned spaces separations, arches, and domed ceilings. It is also excellent at sealing and filling in irregularities such as plumbing, electrical and telecommunications lines or entry points.