Spray foam insulation is a spray applied foam, most commonly polyurethane, has an advantage to other types – such as rigid board or a fibrous insulation – because it handles both critical components of insulation: R-value and air leakage.  R-value is a measure that indicates the ability to limit conductive heat flow, i.e. heat transferred through the material.  Air leakage is the passage of air through cracks and crevices.  Air leakage can account for most of a building’s energy loss, so an airtight seal is critical to building performance.  The National Research Council of Canada (NRCC) concluded that without a proper air barrier, insulation alone cannot deliver optimal energy efficiency and comfort.

 

There are many different types of spray foam, but all have the same application process.  The nature of the application – a fluid material that hardens in place – lends itself to completely filling gaps and voids, thus achieving an air seal.  There are two components, usually called “A” and “B,” that are heated and sent through a mixing gun.  The blowing agent is different depending on what density insulation is being used.  Foam can be applied to vertical and horizontal surfaces.

 

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Roofing shingles appear to bulge at the joints of insulated roofing panels.  When sunlight washes across the roof, it is easy to see the outline of every insulated panel.  The term “Picture Framing” was coined to describe the appearance of a raised “frame” around each roofing panel.  In general, most clients are not happy with the appearance of their new roof.  Something appears to be wrong, even though there are no leaks or other failures, the new roof simply looks terrible.  Understandably, many Owners want the problem fixed before the end of the first year warranty period.

 

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