DEAR POLE BARN GURU: My walls from outside to inside will be as follows, vinal siding, house wrap(Block it), OSB, 2″ of closed cell spray foam, about 5″ of open cell spray foam then OSB inside painted with Kilz Premium Sealer. That is what my insulator has recommended. What do you think of that setup. Good, bad or otherwise? Thanks JOHN in GREENVILLE
DEAR JOHN ~ I don’t know the intended use of your building, so some of my response might not be applicable.
Vinyl siding – I personally would not use it. Other than expansion and contraction issues and it melting if a fire gets too close to it, this is a potential big concern:
Pre-painted steel siding is going to be your most durable and affordable choice. Housewrap is an excellent choice. I’m just now having spray foam done on an add to our home. I’d be inclined to place my money into thicker closed cell foam (which is exactly what I did).
I’d also drywall the inside, I always use 5/8″ thick drywall as it is sturdier and doesn’t show waves as much as 1/2″, plus by using Type X I gain the benefit of fire protection.
There actually isn’t anything wrong with your solution and if it fits your needs and budget, go for it!
DEAR POLE BARN GURU: All the information I’ve found on residential post frame construction normally has some emphatic declaration that the building site must be level to within xx inches.. I understand how that would be the case for a concrete slab floor but suppose one wanted a raised wood floor that I’m assuming would be attached to the structure posts. Would there be any issue then with using varying length posts to account for the variance in grade? What are the determining factors as to how high the floor can be above grade?… I may be using “grade” incorrectly but I basically mean above ground level at any given post.. Thanks, LONNIE in COLORADO SPRINGS
DEAR LONNIE ~ I am hearing you totally, as I own a 22 foot wide by 24 foot deep two car garage which has 12 feet of grade change.
After the building is done.
I had the building designed using longer columns (by 12 feet) and it worked out perfectly. The floor can be as far above grade as you need it to be.
DEAR POLE BARN GURU: I just finished putting together my pole barn garage and would like to know what kind of electrical box do you recommend installing for the outlets and switches? Metal or Plastic? SCOTT in AMISVILLE
DEAR SCOTT: My knowledge of electricity is barely one step above, “If I plug it into the outlet and it works, I am happy”.
My advice is going to be based upon asking others for advice, before doing anything, check with whomever is going to be issuing the permit, as there are a lot of variants from jurisdiction to jurisdiction on what they will accept.
The general theory seems to be if the box will be somewhere exposed where it could be run into then use metal, otherwise (like embedded in a wall) plastic is totally acceptable, as well as more affordable.