Insulating a wood sided shop?

[aczlan]

We have a ~25x45 lean to on the barn that we use as a shop. It has a concrete floor, loft and a big rollup door.
I need to insulate at least the 3 outside walls and the roof. The two ends are 2x6 studded walls on 16" centers (both ends were done when we added the rollup door and the floor) with T111 for the skin, the other (long wall) is post and beam (doubled or tripled rough cut 2x4 posts every 6-8 feet) with vertical tongue and groove boards. Roof is shingles with plywood decking over old 1x10(?) deck boards and trusses under that.

Currently the only heat is a kerosene salamander, we have a woodstove that we will be adding at some point. I have access to a bunch of foil bubble insulation (~12' tall roll, white on one side, shiny on the other).

My first thought was on the ends (which have 2x6 studs every 16") wrap the studs with either the bubbles or tyvec from the inside (ie around each stud), then insulate it with fiberglass and add plywood to all the walls.

On the sides, I was thinking of 2" foam board between the posts and sealing that with spray in foam.

On the other hand, a friend got a bunch of this a while back and put it above his shop with good results: Foam Board. Polyiso. Delivered available. I could put that over the studs/posts and seal it with spray on foam.

My end goals are:
1. Insulate the shop enough that I can fire up the stove and keep it at a comfortable temperature (unlike now where 15 minutes after I shut the salamander off its freezing)
2. Get plywood up on all the walls so I can put up shelves

Edit: I saw http://www.tractorbynet.com/forums/showthread.php?t=299549 but didn't want to clutter up that thread...

Any thoughts?

Thanks

Aaron Z

 

[gengine]

My shop used to be a hay shed, as in roof and no walls. I put up purlins and steel on the outside, and later had foam sprayed in. I use a wood stove to heat it currently. It is 30' x42'. The wood stove will keep it about 50*f while it's around -10*f outside. My propane salamander was too loud. I think the spray in palm, although higher initial cost, is the way to go.

 

[gengine]

Btw, my shop after a day of being heated, stays warm for several hours.

 

[KennyG]

I insulated with polyiso. Great stuff but not worth what they are asking. I paid $5 per sheet for mine.

 

[aczlan]

I insulated with polyiso. Great stuff but not worth what they are asking. I paid $5 per sheet for mine.

I'll ask my friend what he paid. IIRC he had a 6x10 trailer stacked pretty high with the stuff and he went to Buffalo to pick it up, so he may have gotten a discount.

Aaron Z

 

[dave1949]

FRP Shop - Polyisocyanurate (Polyiso) Insulation Board

Yikes! That stuff ain't cheap new. I thought $19/sheet for 2" sounded high, but I'm not sure about that if it's in good shape. No cracks, corners in good shape, etc.

For reclaimed, I'd want to supervise what goes into my load and have a good idea of what dimensions are needed after you cut it to fit. If you would be ripping it for example, and will have a scrap edge anyways, then a dinged edge on one side is not a big deal.

 

[aczlan]

He paid $19/sheet for 2.5" insulation, he selected what went onto the trailer.

Aaron Z

 

[dave1949]

I don't know how representative the prices are on the site I linked, but the 2" styrofoam is $14-$15 per sheet more than I paid in 2006. That's why I said Yikes! :laughing:

 

[aczlan]

I don't know how representative the prices are on the site I linked, but the 2" styrofoam is $14-$15 per sheet more than I paid in 2006. That's why I said Yikes! :laughing:

Its $32ish for a 4x8 2" thick Polystyrene sheet at my local Lowes (R5/inch vs R6), so $3ish off of the 2" sheet would put him at 1/2 the price of new. I may go that route, glue it to the studs/posts and screw through with long sheetrock screws to add the plywood...

Aaron Z

 

[DFB]

Not cheap. Homer Depot gets like $40 for 1 7/8 R12.2 foil face.

TUFF-R 1-7/8 in. x 4 ft. x 8 ft. R-12.2 Foam Insulation-268441 at The Home Depot