Spray Foam roof deck- climate zone 3a

We are looking to add insulation to our attic and are looking for recommendations. I received a quote for spray foaming the roof decking 7-8 inches thick with open cell,… We are looking to add insulation to our attic and are looking for recommendations. I received a quote for spray foaming the roof decking 7-8 inches thick with open cell,…Read MoreGreenBuildingAdvisor