While most closed-cell spray foams will be above 6.0 per inch, open-cell is much lower at 3.6 to 3.8 per inch range. Open-cell will expand as soon as its applied, making it the perfect foam for ...

Open cell spray foam remains soft once set and is only used for insulation. It is more breathable but is often installed where a highly-resistant underlay like bitumen felt is already present ...

Closed-cell spray foam becomes rigid once applied, providing superior insulation open-cell spray foam. It was initially used to stabilise deteriorating roofs.

Measuring open-cell content is a crucial aspect when it comes to selecting a suitable foam. This article describes using the BetterPyc 380, an ASTM D6226-compliant gas pycnometer, to obtain accurate ...