Open Cell Spray Foam

Open Cell Spray Polyurethane Foam is a two component polyol formulation that uses a water blown agent to form a low-density foam of loosely-trapped air bubbles within a soft laminated shell. By sacrificing cell density, ocSPF can be spray applied in incredibly high volume and is the go-to for residential and commercial air-barrier & insulation assemblies.

Noise Reduction Coefficient

STC 0.55 (under ASTM C423)

Flame Spread Index

<25 (under ASTEM E84)

Air Permeance

<0.02 (under ASTM E2178)

R-Value @ 1"

3.72 - 4.1 (under ASTM C518)


Common Use Cases

Almost exclusively due to its high expansion and high yield, ocSPF is the dominate product for residential and commercial foam encapsulation. At costs that are increasingly competitive with traditional forms of insulation, ocSPF is a valuable alternative for a total building insulation system. Notwithstanding an R factor nearly double that of fiberglass, ocSPF easily seals up most vectors for air infiltration/exfiltration, swiftly eliminating the cause of 20-30% of all energy loss within a building. By reducing the load requirements of HVAC units, ocSPF can be used in conjunction with smaller and/or decentralized air-supply units to cut annualized utility costs in half (or more). Incidentally, ocSPF also acts as an efficient sound attenuator; comfort, economy and quietude -all in one.


Material Specs & Characteristics

Open Cell Spray Polyurethane Foam (ocSPF) uses a 1:1 mix of isocyanate and a 100% water blown polyol resin to produce a high-expansion, low-density, spray-applied insulator containing zero ozone-depleting blowing agents. By compromising on cell-wall rigidity, ocSPF is capable of achieving yields 3-4x higher than that that of ccSPF while retaining essentially zero air permeance. This enables the applicator to achieve higher total R-value at a fraction of the cost while more quickly filling gaps and voids in the building envelope. The looser structure of the air bubble cell walls in ocSPF do allow liquid water and water vapor to marginally permeate through the foam capillaries -which in many wood-framed structures works to the builder's advantage in identifying leaks long before rot can set it.

Other products & services

Quick info

Crawlspace Conditioning

Quick info

Sound Attenuation

Quick info

Spray Foam Roofing

Quick info

Closed Cell Spray Foam