Adding Structural Strength With Closed Cell Spray Foam

Here's a summary of the key points about closed-cell spray polyurethane foam (ccSPF) and its structural benefits:

Research and Testing:

• Laboratory studies show ccSPF can significantly enhance wind uplift resistance when applied to roof and wall assemblies

• Testing by organizations like Underwriters Laboratories (UL) found that SPF's wind resistance exceeded their equipment's measurement capacity.

Structural Enhancement:

• ccSPF can increase racking strength of wall assemblies by up to 300%

• It can double or triple wind uplift resistance when applied to roof assemblies

• The foam acts as a bonding agent that helps distribute loads across structures

Real-World Performance:

• Multiple case studies demonstrate ccSPF's effectiveness during hurricanes and severe storms

• Buildings with ccSPF applications have survived major hurricanes while adjacent non-treated sections suffered significant damage

Protection Mechanisms:

• Acts as a shock absorber for wind-driven debris

• Creates a barrier against wind-driven rain

• Reduces potential for high wind pressurization

• Helps distribute loads across building components

The evidence suggests ccSPF can significantly enhance building structural integrity, particularly in high-wind events, though more formal development of standards and specifications is needed.