We insulate the walls with either a closed or open cell foam and an R value that is determined by the customer. We apply open cell (Icynene type) 3.8 R value per inch, closed cell (ridged) R-6.8 per inch and foundation foam/polyurea (a premium foundation system). You can determine your own R value by the amount you want us to spray. With new construction application of foam is quick and virtually mess free.