With High Density Spray Foam Insulation from Jag Construction, you only need 3" to reach a 92% efficiency rating which is equivalent to R-50 of fiberglass.

This thickness easily fits in the space at the bottom edge of any roof deck.

The result: higher insulation efficiency, NO snow melt, NO ice dam.

This time of year that is especially important.  You don't want this to happen:

 

          

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