Opinion on Pole Barn Ceiling

[98CarmineRedTN]

All,

I am working towards finishing the inside of my pole barn. The trusses are 3.5 Feet Apart. My intent is to install OSB, and blow in some Atticat Insulation. My questions are.

1: What thickness of OSB do I need to prevent sagging?
2: Will this be too much weight for my trusses?

Thanks

 

[lakeroadster]

Welcome: Yours is pretty common question here. Got any photo's you could share with us?

All,

I am working towards finishing the inside of my pole barn. The trusses are 3.5 Feet Apart. My intent is to install OSB, and blow in some Atticat Insulation. My questions are.

1: What thickness of OSB do I need to prevent sagging?
2: Will this be too much weight for my trusses?

Thanks

1. You need to clarify question no. 2 first. In regard to the ceiling I'd suggest steel ceiling panels... OSB won't work due to the truss spacing, without installing blocking. Blocking adds weight.
   
2. Nobody here knows if the trusses lower chords are designed to handle the weight. Check with the manufacturer of the trusses.

A similar thread to yours is here: Help needed with 48" OC trusses

 

[98CarmineRedTN]

Welcome: Yours is pretty common question here. Got any photo's you could share with us?

Thank you for the quick reply...

I will try to get some picture this weekend

Dumb Question, but do I need a vapor barrier, or can the Metal touch the fiberglass insulation.

 

[lakeroadster]

With steel you don't have to have a vapor barrier, with OSB yes you do need a vapor barrier.

But some folks use the barrier with the steel....

 

[kbs2244]

Think about trimmed to fit 2x4 suspended ceiling paneles

With good above the ceiling venting no barrier would be needed.

The vapor will follow any leftover heat out and away

 

[wingrider02]

With steel you don't have to have a vapor barrier, with OSB yes you do need a vapor barrier.

But some folks use the barrier with the steel....

I am curious as to the reasoning of no vapor barrier with steel panels?

 

[cjs1958]

Use a vapor barrier, it is a must for fiberglass insulation, also seal any penatrations with a can of spray foam. Your vapor barrier will stop air flow thru insulation. I also suggest steel roofing or cheaper liner panel. There would be no sag, no waste, no painting, and less weight on truss. "ceiling dead load" is what to look for on truss specs-if you them available. You should have 2 pounds/sq ft min. (10 is common for finished ceiling)

 

[bobbyjean]

if you have engineer's stamp on truss....... you can figure what the deadload (think thats the term) then you know your option's
is the roof metal?