Spray Foam Insulation

Leaks and seals

 

 

With metal roofs and buildings, it can be challenging and costly to identify and locate water leaks due to irregular surfaces and angular corners/junctions. Flashings tend to move, increasing potential for water leaks that may be hard to detect and stop.Closed-cell sprayed polyurethane foam conforms to these irregular surfaces, corners, and junctions forming a fully adhered, seamless waterproofing membrane that helps eliminate leaks.Figure 2 (below) shows how closed-cell foam inhibits water from penetrating the foam and traveling laterally, even if the surface is damaged. Repairs are easily done with sealant or foam packs.

 

Energy efficiency

 

There is a higher risk for poor energy efficiency in metal buildings if factors such as air infiltration, radiation, and thermal bridging are inadequately addressed. Traditional insulation techniques (e.g. installing fiberglass, cellulose, or board stock) poorly control these factors—consequently, the forces of convection, conduction, and radiation heat transfer frequently rob many metal buildings of their energy efficiency.Employing ccSPF roofing assemblies can increase energy efficiency in metal buildings in four ways.

 

Closed-cell sprayed polyurethane foam roofing:Is applied above the roof deck, completely separating exterior and interior temperatures;Is typically surfaced with light-colored and reflective materials;Eliminates thermal bridging by providing a continuous layer of insulation over existing thermal bridges in the roof deck and or/ assembly; andPossesses a very high aged R-value of 6 to 7 per inch, depending on manufacturer and the particular formulation specified.Research compiled by Mark Bomberg, PhD, PE—a scientist at the National Research Council of Canada (NRC) who studied ccSPF performance in buildings and authored

 

Spray Polyurethane Foam in External Envelopes of Buildings—confirms they can dramatically increase the energy efficiency of metal buildings and metal roof assemblies.2Severe weather resistanceSever weather is the toughest test for any building system or component. High winds, airborne projectiles, wind-driven water, flooding, hail, and snow are among the hazards that threaten buildings and their occupants. Wind damage claims alone tally hundreds of millions of dollars (Figure 3).