We’re in the design phase of a house in central Texas between San Antonio and Austin. The wall and roof framing will be sheathed with OSB, perhaps Zip. We would like to use an inch or two of foil-faced polyiso as exterior insulation on both the walls and the roof. The contractors we have spoken to so far are not familiar/experienced with this approach. Can anyone suggest framing contractors in the area who are familiar doing exterior insulation? Thanks very much.