pole barn insulation

b fullmer

New User
If I put steel siding on the ceiling of my pole barn with trusses on 4ft centers will it be strong enough to support blown in insdulation?/
 
I think it will depend on the thickness of the steel. They have what they call liner steel, it is a lighter gauge/thickness. Also depends on the depth of the ribs. I believe I would lay a 2x over the tops of ajoining trusses to support a rafter between the trusses. At 2'0" on center you should be able to use the liner steel. If you don't go crazy and put more than say a foot of insulation. Of course this advice is worth just what you paid for it. lol gobble
 
I would install girts the width of your steel (3 ft?) between the trusses. Give them some extra lateral support also, Not much weight in that resulting 12 foot square steel section.
 
If your using fiberglass blown in it doesn't weigh much and should work. Cellulose is a little heavier but if you have an engineered truss it should be able to handle the extra weight if it was designed for a hanging ceiling. Foam on the roof panels is the best way to go. No drips and no heat buildup in the summer.
 
I used the 5/8" hard foam before I put the tin on on a 48x36 shop. A large ceiling fan will help distribute the heat. Also put on the sidewalls. Worked great without all the hassle of a ceiling and insulation. I never used over 250 gal. of fuel any winter, located in central Ill. Didn't keep it over heated, just comfortable to work. Would do the same again. The only drawback is keep the doors shut and the birds out, they love the foam. It is actually worth more in the summer as it keeps it about 20 deg. cooler than outside.
 
You will be fine with 4' centers. I did a shed at my previous farm on 8' centers with 18" blown in above it. It did sag a little, but not terribly.
 

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