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Pole Barn Insulation Questions

 
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Old 02-04-2018, 12:17 PM   #21
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Re: Pole Barn Insulation Questions


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Originally Posted by SLSTech View Post
Better just getting a professional sprayer in there to spray closed cell instead of going with froth packs - it actually comes out cheaper with better results & heh they can spray the ceiling in one shot. As for how much depends some on climate zone but minimum 2" including girts, 2x's encapsulated....
I have a good sub for this. I'll get a quote.

Covering the girts with rigid would encapsulate them. Only the poles wouldn't be.

I hear you on the froth packs. I've used them with good results when I use them in a bucket of warm water but a real rig is always better.
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Old 02-04-2018, 12:32 PM   #22
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Re: Pole Barn Insulation Questions


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Instead of starting a new topic I'll tag onto this one. I making an offer on a property with a pole barn, already built. I would stick frame a shop if I was building from the ground up.

I'm not on so much of a budget. I want to condition the space and not cause condensation issues. Of all the types of projects I've done, pole buildings are not included. They are unfamiliar to me and look like funny buildings with no apparent lateral design and 1/4 the right amount of trusses

I like the idea of ridgid plus spray foam. Maybe instead of cutting between the girts, just lay over. I could also just spray foam the seams. One $700 600 board foot foam kit might do it. 2" Polyisocyanurate (yeah I spelled that without looking it up!) is about $1 a square foot. R13 might be enough, I'll be heating it 20 degrees delta T a few months a year, with an efficient heat pump.

What about the ceiling?
While this paper needs to be considered for the source's potential bias, if there is truth behind it, it's a consideration.

Further, I think extruded polystyrene is around $0.50 per board foot, and iso would be around $0.33. Of course that would depend upon who is buying and where.

A few years ago I did a horse stall ceiling (3 stalls maybe 500 sf) with 2" extruded and the two part SPF (portable, disposable cans you are describing) on the seams and joints. I think it worked out well. The horses were causing a condensation issue that appears to have been remedied.

Using the described method would be quick and easy on walls between posts. I honestly don't recall what I did for the ceiling bays (16"o.c.), but I probably ripped them on the table saw. I probably didn't use even half the foam.
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Old 02-04-2018, 01:05 PM   #23
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Re: Pole Barn Insulation Questions


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While this paper needs to be considered for the source's potential bias, if there is truth behind it, it's a consideration.

Further, I think extruded polystyrene is around $0.50 per board foot, and iso would be around $0.33. Of course that would depend upon who is buying and where.

A few years ago I did a horse stall ceiling (3 stalls maybe 500 sf) with 2" extruded and the two part SPF (portable, disposable cans you are describing) on the seams and joints. I think it worked out well. The horses were causing a condensation issue that appears to have been remedied.

Using the described method would be quick and easy on walls between posts. I honestly don't recall what I did for the ceiling bays (16"o.c.), but I probably ripped them on the table saw. I probably didn't use even half the foam.
I remember reading that once. I had forgotten the info. Good info though. I've done wall assemblies with iso on the inside of a bunch of fiberglass, based on this report. Seems like XPS would be the way to go for a lightly insulated pole barn.
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Old 02-04-2018, 01:05 PM   #24
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Re: Pole Barn Insulation Questions


if you use spray foam, don't spray it directly to the steel on the building.
it will make it look terrible from the outside.
does the building have soffits for attic ventilation?
we take quite a few pole sheds and turn them into shops for people
if you want cheaper, they make large faced batts 8' wide to fit between the poles

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Old 02-04-2018, 01:13 PM   #25
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Re: Pole Barn Insulation Questions


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if you use spray foam, don't spray it directly to the steel on the building.
it will make it look terrible from the outside.
does the building have soffits for attic ventilation?
we take quite a few pole sheds and turn them into shops for people
if you want cheaper, they make large faced batts 8' wide to fit between the poles

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Any issues with condensation with fiberglass? I don't want to spray straight to the metal. I'll do a combination of rigid and spray.
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Old 02-04-2018, 01:30 PM   #26
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Re: Pole Barn Insulation Questions


we haven't had any issues as long as you make sure the fiberglass is thick enough to fill the whole wall cavity to the steel
kinda like a steel structure building that gets pinch insulation between the steel panels and walls.
no condensation problems untill the fiberglass sags overtime from the ceiling and leaves small gaps where the fiberglass is no longer in contact with the steel panels
had it happen in the local school gym when we put a new roof on.
I told them we should replace insulation with the steel, because when we "break" the seal between the insulation and steel it will cause an air gap
they said it wasn't in the budget. that winter they had drips in the gym floor. so they called to say the roof was leaking. I can and looked, said no your insulation is bad and it's condensation
they didn't believe me, so they had a engineer come look.

guess what he said, you need new insulation, old stuff is no good.
then the school said they should of listened to me from the start, so an 8k cost turned into closer to 20k to put new batts in from underneath

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Old 02-04-2018, 01:38 PM   #27
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Re: Pole Barn Insulation Questions


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Hey everyone I'm looking for some tips on how to insulate my new shop. I have an idea but not sure if it's appropriate,so all feedback is welcomed.
I just built a 1000 square ft pole barn I am framing inside with 26 to match poles 2 ft centers. My plan was to then use bat insulation probably r 21..iny question is on the way they built the pole barns is they have 24s laying flat on exterior to attach siding.if I frame and insulate as I mentioned it will leave a 1 1/2" air gap behind the insulation and the metal siding. Is this ok? Will it create moisture behind the walls? Please let me know what you guys think. Ps I have a budget so I'm looking for proper and cost effective solutions..thank you, chris
This plan is fine and will work just fine. I would recommend that before studding the walls you closely inspect the bottom of the metal panels for places where mice could get in or where you might have significant outside air leakage. Have seen guys go along the base with a can of spray foam and fill all the ribs for this reason.
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Old 02-17-2018, 02:28 PM   #28
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Re: Pole Barn Insulation Questions


I just learned my neighbor to be owns a spray foam company.
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Old 02-18-2018, 05:43 PM   #29
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Re: Pole Barn Insulation Questions


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We did a black ceiling with galv walls for this one. It was an old horse barn we converted to a toy barn/art studio for our client.
What did you do above the ceiling?
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Old 02-18-2018, 05:53 PM   #30
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Re: Pole Barn Insulation Questions


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What did you do above the ceiling?
Blown cellulose.
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Old 02-18-2018, 06:44 PM   #31
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Re: Pole Barn Insulation Questions


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Blown cellulose.
What spacing are the supports for the metal?
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Old 02-18-2018, 06:46 PM   #32
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Re: Pole Barn Insulation Questions


I'm also debating just insulating the top of the trusses, I get a lot more ceiling height and could make half the shop have a mezzanine with 8' head room. My trusses are 14' OC. The heat loss is almost identical. It's not about cubic feet, it's about square feet of exposed surfaces. Doing a ceiling though would let me have a vented roof.
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Old 02-18-2018, 06:50 PM   #33
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Re: Pole Barn Insulation Questions


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What spacing are the supports for the metal?
Trying to remember but I think those trusses were 4' O.C. Our shop trusses are 8' O.C. with blown cellulose and we don't have any issues.
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Old 02-19-2018, 09:05 PM   #34
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Re: Pole Barn Insulation Questions


I'm not that familiar with pole barns, but whenever I hear fiberglass batts I think major air leakage. Since I'm almost positive pole barns aren't built with air sealing details, I wouldn't even consider fiberglass batts as a stand alone insulation.
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Old 02-19-2018, 11:39 PM   #35
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I'm not that familiar with pole barns, but whenever I hear fiberglass batts I think major air leakage. Since I'm almost positive pole barns aren't built with air sealing details, I wouldn't even consider fiberglass batts as a stand alone insulation.
I could 6mil poly, tape the seams and tremco to the framing.

But unless anyone has reason this is a bad idea, I'm just going to put foam board between the girts and then spray foam the whole thing.

Heat/cool with a 3 ton mini split. Easier than running a gas line out there and almost identical energy costs, with added bonus of A/C.

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