Pole Barn Roof Insulation

[JCook5003]

I'm finally about to start construction on my 24x30 shop with 24x20 equipment shed attached.

The plan is to use perma-columns and steel pole barn style trusses from a local builder. Like these:

24x30 of the area will be totally enclosed with a concrete floor for a shop.

My question is, upfront how do I set myself up for success as far as condensation and insulation goes.

I'd like to know what you all are doing to stop the roof from "raining". Where if anywhere should I put tyvek? As far as roof insulation goes how would you do it in this style of building? I'm just trying to make it as good as I can from the beginning.

I know spray foam might be the very best but it's probably too expensive for me. All suggestion welcome and appreciated.

 

[rustyshakelford]

On mine it was a 4'x125' rolls of foil insulation. One side looks like foil and the other side is white. Foil towards the metal, white side is what's visible. They would roll it and use a slap hammer to hold it down till the metal was installed. It's comfortable in my shop right now with the doors open.

Brett

 

[JCook5003]

On mine it was a 4'x125' rolls of foil insulation. One side looks like foil and the other side is white. Foil towards the metal, white side is what's visible. They would roll it and use a slap hammer to hold it down till the metal was installed. It's comfortable in my shop right now with the doors open.

Brett

Was that for ceiling and walls? I suppose it is its own vapor barrier also. Thanks.

 

[rustyshakelford]

I just did the roof. Figured I could just add batt insulation later down the road if needed. I might try and use a wood stove for heat this morning and that could decide how I proceed but as mild as the winters are here it'll prolly stay the way it is.

Brett

 

[Oregon rock crusher]

Yes condensation forming on the ceiling of a pole barn is a huge problem. Mine used to rain down in lines off the purlins whenever the temp went from cold to warm / humid. I ended up putting in some bat insulation with a durable plastic surface. I ran it perpendicular across the bottom of the purlins to leave an air gap between the insulation and the vapor barrier then secured it along the bottom with plastic pipe strapping and roofing nails. No more indoor rain. Ed.