Envirofoam™ Low Density Spray Foam Insulation

Envirofoam™ Low Density - Open Cell Foam - EOC.5

 Envirofoam™ Low Density - EOC.5  is a high-yield, open cell, Class 1 fire-rated, 100% water-blown spray polyurethane foam insulation designed for use in residential and commercial walls, attics and roof decks. When applied,  Envirofoam™ Low Density Foam expands to over 100 times in size in approximately 4 seconds, filling and sealing building cavities of any shape and size. It is sprayer-friendly, offering a wide application window and temperature tolerance and excellent adhesion when installed in cold temperatures down to 15°F.

 Envirofoam™ Low Density seals and insulates in one step, helping property owners reduce energy consumption by up to 50% when compared to conventional insulation systems. Its superior thermal insulation, sealant and sound attenuation properties contribute to a healthy, quiet and more energy efficient building.

Envirofoam™ Low Density Foam has a 3.85 R-Value and is Appendix X compliant.

Open-cell foam is characterized as being composed of many air bubbles held within a polyurethane matrix. As with many insulations such as fiberglass, it is this trapped air that lessens the heat transfer through the foam. It is applied by a professional foam applicator through a High pressure Spray gun to an open wall cavity and quickly expands to fill the space, adhering tenaciously to anything it touches. With R-values of 3.8-4.2/in.,  it has very Specific applications in both sound control and Insulating material and Dry Places. In the industry, it is commonly called “half-pound” foam. Open-cell foam is not a vapor barrier but instead allows it to pass through the foam matrix. It is particularly effective in hot climates where loads are primarily cooling or for sound control because of its High STC ( Sound Transmission Control ). It is cheaper than closed-cell foam, and less dense. When installed in wall cavities, the foam may overfill the cavity. Later, the excess is trimmed away or In envirofoams new net and fill system the environet is Installed and the cavity is filled and there is no waste, Making the install environmentally friendly.

Envirofoam open cell roof deck application

Envirofoam open cell roof deck application

Low Density Foam

Open Cell VS Open Cell

Compare Open and closed cell foam

The name pretty much says it all. The open cell foam has open cells, same foam found in your couch cushions. Closed cell has closed sealed cells making it a vapor Barrier and rigid foam.

Cavity Fill Foam

envirofoam open cell foam in wall cavity

Open cell foam Normally is a Foam that fills the cavity & gets shaved Smooth. Filling a 2x6 cavity can give you an R-14.7 But More Importantly it's a Permanent Insulation solution. Does not sag or shrink & is effective for the lifetime of your home, unlike Fiber Materials. Cellulose & Fiberglass

Air Sealing

Envirofoam air leaks

 Imagine a draft free energy-efficient home. Spray foam expands up to 100 times its original size to fill every corner of a building’s envelope for thermal insulation and air sealing. With traditional insulation, spaces and gaps in homes that aren’t filled can leak enough air everyday to fill two air blimps! 

About Envirofoam ™ Low Density

envirofoam open cell foam sample


  • Aged Thermal Resistance: 3.85 per inch*
  • Construction Types: I - V
  • Core Density: 0.5lb.
  • Superior cold temperature adhesion to multiple substrates
  • <5% water absorption
  • Vapor permeable, support bi-directional drying of assemblies
  • Soft, flexible composition maintains an air seal even after seasonal expansion/contraction of building assembly

Benefits of Open Cell Foam

envirofoam open cell foam filling gaps

One of the biggest benefits of open cell foam is that it expands so much after it has been applied, meaning it can insulate hard to reach nooks & crannies in a home. These types of areas can be hard to insulate with closed cell foam. Open cell foam is excellent for soundproofing where a single application can completely fill the area between studs.

Open cell foam is also much more affordable than closed cell foam, however this foam won’t insulate a house as well as closed cell foam, so it’s not ideal for locations with extreme weather temperatures.

Envirofoam™ Low Density TDS

Technical Data Sheet for  Envirofoam™ Low Density EOC.5

Envirofoam™ Low density TDS (pdf)