Insulation/vapor barrier

[Villerider]

First post. I have already gotten lots of great ideas lurking but now it's time to come out of the shadows. I am starting to move my shop from a basement to an existing attached garage. I work for a property management company I am setting up shop in an oddly shaped 1 1/2 car garage. The first order of business is to insulate. I will be using batt as it I have a large amount available, some is for 6 inch walls so I will pull it in half and need a way to attach it to the wall at least until I cover them. It appears there is no vapor barrier and the walls are simply 2x4 sheathed with an osb product that looks like vertical barn or shed siding on the outside. Do I need to put a vapor barrier over the insulation? Wall covering will be a mix of what I have on hand as I'd rather spend money on tools than other peoples property. Osb, pegboard, ply, drywall, vapor barrier only? Thanks!

The wall to the house is brick so I don't need to worry about code so much.

 

[rburke65]

Hello from Ohio. Any chance on a photo or four?

 

[Villerider]

Photos soon, garage is still full of POs stuff. So ready to be above ground and able to work on a vehicle!

 

[Villerider]

Found a couple of pics moving some stuff in. Just storage for now. Sorry no close ups on sheathing.

Found a fastenal 40 bin storage rack at the dump today! And those file cabinets are heavy!


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[Jlbc212]

If it was my garage, I would cover the insulation with 6mil poly. It will hold the batts in place, but more important, it will keep moisture (invisible water vapor) in the garage from migrating into the insulation inside the wall. Water vapor condensing in the wall will effectively destroy the value of the insulation and mold may develop on the interior side of the wall sheathing.

 

[MN4x4]

You didn't post where you are, but it's probably a good idea to put up a vapor barrier regardless. It also helps to seal in heat or cold when you condition the space.

 

[Villerider]

Can I put it over the insulation and under the wall covering?A little late to put it on over the sheathing. I'm in KY, heat is supplemented by the homes boiler and an electric space heater.


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[MN4x4]

Can I put it over the insulation and under the wall covering?A little late to put it on over the sheathing. I'm in KY, heat is supplemented by the homes boiler and an electric space heater.


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Yes, you want it on the conditioned side of the wall, i.e. on the inside. Under sheetrock, paneling, or other wall covering is a 'normal' installation.