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EERE » BTO » Building America » Solution Center Home » Image Gallery » Right – The underside of this low-sloped roof is insulated with open-cell spray foam in this dry climate to achieve the code-required R-value; the builder used the same foam to insulate exterior walls.

Right – The underside of this low-sloped roof is insulated with open-cell spray foam in this dry climate to achieve the code-required R-value; the builder used the same foam to insulate exterior walls.

Right – The underside of this low-sloped roof is insulated with open-cell spray foam in this dry climate to achieve the code-required R-value; the builder used the same foam to insulate exterior walls.