This Wednesday the Pole Barn Guru advises readers on adding 6″ fill to the site and the affect it would have on columns, the use of XPS insulation between the steel and framing of the building, and some thoughts on building a 3 bedroom, two bath house.
DEAR POLE BARN GURU: Hello, The site I am looking to build a pole barn had to be filled to bring the area up to a level grade. The depth of the fill is about 6′ at the deepest point. How does this impact the setting of the post? CRAIG in EAST WATERBORO
DEAR CRAIG: Provided fill was mechanically compacted to no less than 90% of a Modified Proctor Density in lifts no greater than six inches, it can be treated as native soil. If proper compaction was not achieved, then columns should be lengthened in order to provide full embedment into undisturbed soil beneath fill.
DEAR POLE BARN GURU: So I was going to place 2 layers of 1″ xps foam under my metal on the walls and roof of my pole barn. So it would be, purlins 2 1inch of xps and then my metal, is this a good or bad idea? Thanks BJ in JACKSON
DEAR BJ: Absolutely a bad idea. Pole barns “work” (e.g. stay standing) due to shear strength of steel sheeting (or OSB, plywood, etc., if used). When you place insulation boards between steel and framing, you are severely impacting ability of steel to carry those loads, as steel can shift slightly under wind loads. Eventually this will cause screw shank deformation (would take some very long screws), as well as slotting under screw gaskets, creating leaking (provided building doesn’t just fail first). If you really want to use XPS sheets, cut them to fit snugly between purlins and girts, taping all edges to achieve a tight seal.
DEAR POLE BARN GURU: I would like to think of something for my 2 boys and I. One story 3 bed 2 bath. Living room dining room kitchen, laundry room with walk in closets. About what size would you recommend? SHANNON in KIPTON
DEAR SHANNON: In order to determine best size for any particular client, I encourage them (and you) to utilize links found at #3 in this article https://www.hansenpolebuildings.com/2021/02/a-shortlist-for-smooth-barndominium-sailing/ This will assist you to work towards your ideal dream home, within budget.