Closed cell spray foam should be 4- to 5- inches on the ceiling and 2- to 3-inches in the walls. This might come as a surprise to you, but honestly, this is all the spray foam it takes to get the biggest bang for your buck with the air seal and thermal resistance needed for certain areas of the home

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Spray Foam Insulation NYC is a locally owned licensed insulation company that has insulation solutions for any project and can meet your client’s insulation requirements. We serve the New York City, Queens, Brooklyn, Staten Island, Manhattan, NJ areas.