Foam thickness

Dear Tom,
I am building in a field and the wind blows all the time. Is there any gain with 1/2" foam on the outside with the seams taped? If I do this I am going to use high density insulation in the walls with the paper on it then sheetrock. Any concerns? I know there is not much R value in 1/2" foam but I would think it will keep the cold wind out. Thanks for your help...
Ron


Ron,
If you are building a new structure, you need more than 1/2".
It should be a minimum of 1.5" and I would go with 2". The higher R value will keep you above the dew point in the walls.
Use the tape and the high density fiberglass. You will not need a vapor barrier on the inside with that thickness of foam on the exterior.
It is more money but oil is even more!
You will be glad you did this.
Tom