Shop -- interior walls and insulation questions

[kaiser715]

So, last year I put up a red iron building, 42x60x16.5. I am just now getting around to putting up interior wall panels of some sort. I thought I knew what I was going to do, but have been re-thinking the plan.

Shop is currently: 26ga roof panels, with R32 vinyl ceiling, and 29ga liner panels on the ceiling of the welding room. Walls are 26ga outer panels, with R-13 white vinyl backed fiberglas insulation.

I really don't feel I need to add any insulation -- if it's super-cold or super-hot, I'll be in the house.

Original plan was to run metal liner panel vertical, attached to the girts. This would, however, leave a 6" or so dead air space between the panel and vinyl backed side of the insulation. That might help, but with vinyl on one side, and metal on the other of the gap, would I have a condensation problem?? Would I need to vent that space somehow?

One variation on that would be to frame out something, that would be against the insulation, to attach the panels to, but I'd only gain about 2.5" of space over just bridging the girts. Think 2x4 stud wall or metal framing. Lots of time and money for little gain, and would still have an air gap.

Second option would be to frame up as close as possible, or bridge the girts, and use plywood for wall panels. This would maybe help from creating a second vapor barrier...until I painted the plywood, making it less permeable. (Vents, again?)

Third option, one I saw on YT, was to just run a metal angle on the floor, and one top and bottom on each girt, and use vertical 3/4 T&G advantech for wall panels, with no other framing. That way, can get wall panels right up against insulation, gain 6" of floor space, and still be able to hang stuff.

Again, I see no advantage to trying to fill the air gap with insulation. No return for the $$ invested.

Thoughts, opinions, experience???

(BTW, electric will go in after interior walls, all surface mount EMT.)

 

[awheelterd]

I just have metal panels from the floor up to the first girder with a gap behind to the vinyl insulation. I haven't noticed any problems condensation wise. It is not super sealed so I'm sure there is plenty of air moving around. IMHO there isn't enough temp difference between inside and out to have much condensation. In the winter with the wood heater rolling there's a temp difference but it gets very dry in there so I doubt any condinsatin could survive long enough to hurt anything

 

[Stuntman Autoworks]

I would say since the metal is all within the insulated envelope of the building that you wouldn't have to worry about condensation on the backside of the panel.

 

[shawn]

What do the original engineered drawings of the building allow for?

 

[WARRIORWELDING]

Every metal building I have worked in have done zero about the gap.

It will do what the interior does. I worked in a shop with zero moisture barrier under the concrete and insulated everywhere with metal interior.
The floor stayed soaked in humid periods (all year this year). The walls where bone dry inside and out except right off the floor.

I am going to use the gap for built in shelves and storage. Trim it out and make it custom with a liner in the back as well. Call it near free verticle storage bins....got some ideas for folding doors and gas shock operators as well. Paints, glues, misc stuff that clutters up work spaces. It'll all be bonded to the building frame and have vents in it too......so sorta a built in flamibles cabnit where needed.

I'm already working one space for binders, chains, straps, and the like.