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pole barn ceiling insulation

Fibersport

Active member
Joined
Jan 20, 2015
Messages
27
Location
Valparaiso, IN
I haven't seen anything on what I want to do so here goes:

new pole barn, 30x54 with a bottom of truss height of just under 10 ft.
trusses are on 8' centers with 2x4 purlins on 24" centers
metal roof with ridge vent and perforated overhangs

I would like to insulate the area between the purlins and then install drywall or maybe ceiling tin, the reason is I kind of like the open area rather than a 10 ft ceiling. This would end up being more like a cathedral ceiling as it would be the second easiest way to insulate the ceiling area. Doing it this way would allow me to fit in a hoist which would raise the car up in between the trusses.

Right now there is no heat and I'm not sure what kind if any I will put in it. The current floor is stone which lets in a lot of moisture, a concrete floor is on the list but not until next year some time - have to get the son out of college first!

What might be the best insulation to put in between the purlins. Keep in mind it's only 3-1/2" deep so big R values can't happen, I just need to keep the condensation from happening and keep some heat in if I do end up heating it while I'm in there. Also, what about a moisture barrier - between the insulation and roof or between the insulation and the drywall?

Greg
 
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DougWil

Well-known member
Joined
Dec 29, 2015
Messages
547
Location
NW Montana
3.5 inches of insulation way up there, with lots of leak around probably isn't going to accomplish much.

If you wanted or thought you might have wanted a lift you should have put in scissor trusses. You might get away with just a raised 8'x??' section between the trusses for the lift and truck cab to project into.

But if you are serious about insulating it and doing it right you now have to address the shortcomings of a pole barn which lacks framing for insulation and sheeting.

If you want an energy efficient building you have to install an air barrier, vapor retarder and a thick layer of insulation.
You have to stop all the air infiltration into the framed cavities.

Green building advisor has lots of info on various ways of doing that.
http://www.greenbuildingadvisor.com/
 
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