Pole Barn Finishing Questions

[inane2]

Good morning guys!

I'm working on converting a horse barn / indoor riding arena into a garage / workshop. This thing sat vacant and basically neglected for eight years in a divorce settlement (someone else's divorce settlement!) I've owned it for 3 years now and have been clearing out snakes and mice and clearing the exterior of trees and shrubs that were allowed to grow way to close. This is a 36'x48' barn with an attached 60'x96' indoor riding arena.

I've got all of my concrete poured and new overhead doors installed. I'm ready to finish and insulate the barn area. I'm working with the 36'x48' barn. The left 12' (running front to rear) consists of an office and two horse stalls. This leaves me with a 24'x48' clear working area. Due to this, I'm only finishing / insulating the front and rear walls (24') and the right wall (48'). The office and stalls are already finished.

Basic pole barn construction. 5"x5" posts, 12' OC. The wall consists of a 2x6 grade board, 3 more 2x6 girts and a 2x4 girt at the very top. Headers are 2x10 (single, on the inside only).

I've got to do a little work to the corner pictured. I'm replacing the metal thanks to a small hole made by a Case 580L and replacing the grade board and a girt thanks to a leaky fiberglass skylight. Once I'm done, I'm going to finish the walls, probably with OSB. For insulation, I've got some 1/4" Low-E.

ESP Low-E Reflective Insulation - Home Page

So far, I have 2 questions for you all. The first is regarding to the header area. The posts are 12' OC but every 6' OC is a small piece of a 5"x5" post.

I'm torn on how to approach this. I've considered putting up a 2x12 just below the 2x10 header. This will put the bottom of the 2x12 about 1 3/8" past the bottom of the cut of 5"x5" post. Then I thought about ripping a 2x8 running it flat towards the girt. This is kind of making a box, something that might look like a wooden gutter. It's just a rough thought, what do you all suggest?

Secondly, after I get the Low-E hung, would you guys place the OSB right against it and nail into the girt or would you frame out with 2x4's and nail the OSB to them instead? It makes no difference to me if the posts stick out from the wall or if the wall is flush with the posts. I'm running my new electric outside the wall in conduit, so nothing will be behind the wall except for insulation.

I apologize in advance for the lengthy post but eagerly await any responses!

Thanks!

 

[RxRatedZ71]

When i "decked" one of my walls with OSB i framed it in between the posts so they set out. I knew i wanted air space between the insulation and OSB.Now im doing the opposite wall and have considered making it flush with the posts. Just throw up some 2x6's and start at 1 end. I think there would be less waste in OSB. Really its whatever is easiest for you.

 

[inane2]

Thanks for the advice. I knew everbody would have differet ways of finishing the walls out. I guess my biggest question was with sealing the walls up along the headers if I don't bring the walls out from in between the posts.

I may frame it up to bring the walls out past the post, this may be an easy solution.