Interior Pole Building Framing for Insulation

[spam4us]

Hello everyone. I've seen lots of posts about installing insulation in a pole building. I came across some 4 x 8 sheets of rigid insulation and am curious as to how others have installed them. My poles are 5-1/4 inches with the girts attached to the outside.

The insulation panels that I have measure 2 inches and also 2 1/2 inches thick. I would like to frame out the interior so that the studs will be even with the interior of the post. That way when I put the OSB/plywood up, it will cover the studs and the posts and I would see one continuous wall. I would like to do it this way so if I hang cabinets or shelving I would not have to worry about having them fit between the posts since the interior wall will be flat all the way across.

I live in Maryland.

What can you suggest to make up the 5-1/4 inch wall thickness. I was thinking about screwing 1 by's to the girts first(as a 3/4" spacer) and then placing the 2" 4x8 sheets against that then framing an interior wall with 2x3 spaced 2 ft. with the 2-1/2 insulation between and then putting up the osb.

The panels are rated R-5 per inch. I think doing it this way will be overkill as far as the R-value. It would be about R-22.5 with 4-1/2 inches of foam.
The wall would look something like this.
Exterior metal
1-1/2" Girt
then.............
3/4" 1x
2" foam panel
2-1/2" 2x3 and insulation
-------------------------
5-1/4"thick

Again, the reason I want to stud the wall out is to have it flat with the inside post of the building and also to support some weight for when I put up cabinets or shelves.

Please, no spray foam. I already have the rigid panels and they were free.

Thanks everyone.

 

[astroracer]

I wouldn't worry about the 3/4" spacers, no need. Just screw to the 2" right to the girts. The air gap will help insulate.
I would suggest using some house wrap (Tyvec or equiv.) to wrap the entire structure on the inside before building the interior walls. Easy enough to do and it will help IMMENSELY, even on the inside, in sealing out the wind. Spray foam all of the corner joints also.
The rest of the plan is sound.
Mark

 

[rieferman]

Agree with post above.

For "studs" simply install horizontal girts on the inside face of your poles (often called "re-girts") at 24" spacing. It makes framing extremely fast, attaching interior wall covering extremely easy, and gives a great space for chasing electrical lines etc. around the room.

Edit: in areas where you may have cabinets (or similar) you can add extra horizontal studs as needed.

In other words, no need to get stuck in stick framing mind set trying to fit between the poles. Just finish the inside exactly as they did the outside. You'll be done in 1/4 of the time (and this is how many of the national companies do it).

 

[astroracer]

Agree with post above.

For "studs" simply install horizontal girts on the inside face of your poles (often called "re-girts") at 24" spacing.

The only problem with this is lost interior space. If the barn is huge, probably wouldn't make a difference but, 2" is 2" in my book and I would want to keep it as large as possible.
Mark

 

[shelbyz28]

Yep, that's the way I did it; used nails with large plastic washers to outside girts to hold the first layer in place, spray foam in a can the gaps, trim excess, tack second layer to firstly yet and posts, then lay girts on the inside after spray foaming the gaps again.

Oh, and I had tyvec outside and 6 mil plastic sheeting inside. No air leakage in the wall structure for me!

 

[Disturbed]

I have used this method to finish the inside of my first pole building and am currently in the process of doing my current building the same way.

I run vertical 2x4s laid flat again the inside of the girts and finish the walls between each post, leaving the posts exposed. Takes a little longer but I was please with the results. I like leaving the posts exposed, I run my power around the top of the wall and drop a run of conduit down each pole for outlets.

Insulate between the horizontal gurts, then run the vertical 2x4s and insulate between them as well, will give you 3" of board insulation in the walls.

For wall covering I used OSB then covered it with 5/8" drywall on my first shop. On the current shop I believe I will use 1/2" drywall. With the drywall supported by the OSB behind it 1/2" is more than strong enough. The OSB allows me to mount stuff on the walls wherever I want and drywall provides the fire protection.