We were employed by a local builder to install spray foam insulation in this new construction home in New Hartford (NY) To comply with the building code we had to install 7” (inches) of Closed Cell Foam to the underside of the roof deck. We also sprayed the gable end attic walls with 3.5” R-25. This was the first time we had worked for this builder and reports are good that we’ll hear back from him again! You know who to call!