Sprayed Foam Insulation
Polyurethane spray foam is often categorized as either "open-cell" or "closed-cell".
There are several major differences between the two types, leading to advantages and disadvantages for both, depending on the desired application requirements.
Polyurethane spray foam is an extremely versatile material that is available in a variety of final physical properties and densities, making it necessary for the end-user to have an understanding of these differences in order to choose the spray foam system that is best suited for the particular application requirements
Comparison Open Vs Closed Cell Spray Foam
| Open Cell | Closed Cell |
|
Good Insulation Value R Value = 3.5 per inch U Value 0.35 at 100mm |
Excellent Insulation R Value > 6.0 per inch U.Value 0.26 at 100mm |
| Higher vapour permeability but controlled | Low vapour permeability |
| Air barrier at full wall thickness | Air barrier |
| Resists water - is a water resistive barrier - see Flood damage page | |
| Low density | Medium Density |
| Best sound absorbtion in normal noise frequency ranges | Aborbs sound, especially bass tones |
| Increases wall strength | |
| Economical yield |
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