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Foam Insulation for Metal roof of Pole barn?
#1
Posted March 07 2016 - 02:55 PM
For the roof, I want to insulate it a bit. When it is cold and I put on the heat, I get dripping from teh ceiling. I am told if I spray foam it, I will get some insulation, and no water (and less noise). I had considered just putting up rigid foam board (putting a small cleat on the trusses to hold it) with a slight 1/4 air gap to all ow for air to flow and water to run off. Any comments, thoughts, ideas? The building currently has no heat other than the torpedo heater I put on for the few times I am in there. Long term plan is propane heater to be used when I am in the building.
I would blow off insulating it, but the condensation on everything is a pain (yes, another member warned me). If I can close it up better, I think it would be more comfortable, and less "wet" when it is not occupied.
Also, in case it's related - the floor is smooth concrete - I have thoughts of putting down epoxy on it (down the road).
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#2
Posted March 07 2016 - 03:16 PM
Edited by warmnfuzzyar, March 07 2016 - 03:18 PM.
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#3
Posted March 07 2016 - 03:47 PM
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#4
Posted March 07 2016 - 04:11 PM
- NRATC53, Parashooter and bigbore44 like this
#5
Posted March 07 2016 - 04:18 PM
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#6
Posted March 07 2016 - 04:20 PM
Attached Files
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#7
Posted March 07 2016 - 04:49 PM
You attach a spruce 1 x 2 against the purlins along the side of the rafter ( this creates an airspace from top to bottom ) Then you put your rigid against the 1 x and sandwich with another 1 x . Purlin , 1x , rigid , 1x . I would make a test of this and watch it for awhile .
#8
Posted March 07 2016 - 05:11 PM
Yes, this was my plan - rip down some 2x4's to make trips to use as a spacer above and a "cleat" below. Cleat would hold the foam board up.you can still put rigid if framed as above , 2 ft. or 4 ft OC rafters . Here's how .
You attach a spruce 1 x 2 against the purlins along the side of the rafter ( this creates an airspace from top to bottom ) Then you put your rigid against the 1 x and sandwich with another 1 x . Purlin , 1x , rigid , 1x . I would make a test of this and watch it for awhile .
In my case, the ceiling is open - like in bigbore's picture. It is not so much of a ventilation issue per se. It starts as a cold dry room. If I go in there and work (with everything closed up and heat running), the moist warm air rises to the roof, and then the moister condenses when it hits the cold steel roof. I could vent the whole place with eve vents, but then I'm blowing warm air out the building all day (with little chance of the place getting warm).
True, the last time I worked in there, it was raining out (hard) and the vehicle I rolled in to work on was soaked. I know it's hard to keep moisture off cold things (like a metal roof) - so I thought the spray foam would do the trick (and I would not have to worry about managing the water running off the metal)
#9
Posted March 07 2016 - 06:19 PM
#10
Posted March 07 2016 - 07:35 PM

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#11
Posted April 09 2017 - 03:49 PM
Any pictures.
#12
Posted April 09 2017 - 05:50 PM

zzrguy - you are waking the dead (lol) - Sorry I never posted completed pictures. It was a bit of a pain in the butt, but I have kids, so I made them do most of the work (after all, why else would one have children, except for their usefulness as slave labor?). Here is a crappy photo of the before and after.
2016-08-14 09.32.41.jpg 126.15KB
5 downloads
IMG_20170319_191458.jpg 96.38KB
5 downloads
I cut the rigid foam fairly close to bay width (using table saw), and then foamed the edges (tried not to let foam touch metal roof - so there is some outlet for water). Perlins were not run exact, so this made for more work.
The insulation worked. No more rain...
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#13
Posted April 09 2017 - 06:44 PM
Cool good to here it worked out for you.
#14
Posted June 20 2018 - 05:33 AM
I have an existing pole barn with a metal roof. 2x10 rafters 19.2 centers with 2x4 purlins 2' centers similar to bigbore44 picture above. I am retrofitting for engineered structural sheer in a high wind area. all exterior walls (currently open, no walls) to be 1/2" sheer ply and installing a complete sheer ply ceiling. I am concerned about condensation from warmer moist air hitting the metal roof. If I install bat insulation in the 19.2" cavities I don't want to get it wet and loose my R value or rot the rafters. The cavity will be inaccessible after the sheer ply is installed. There is existing venting at the ridge and planning venting at the eves, concerned that in NC coast that the humidity is very high and condensation will be a problem. I considered installing a 1" or 2" ridged foam board with sealing edges and r-19 (18" x 5 1/2" batts) below it in the 2"x10" cavity ( 9 1/4" space) leaving room for air flow to ridge. The foam board would be a vapor barrier. This project is very labor intensive.
I have considered spray foam on back of metal roof but very expensive and comments above has me questioning the spray foam installation.
#15
Posted March 02 2020 - 12:08 PM
Adding spray foam on the back of the roofing material offer great insulation, even roof repair experts also recommend that.
#16
Posted March 02 2020 - 03:03 PM
Spray Foam if not done properly will give off a nasty odor.Adding spray foam on the back of the roofing material offer great insulation, even roof repair experts also recommend that.
#17
Posted December 29 2020 - 09:20 AM
I suggest you to consult with roof repair boca raton company for inspection of roof. Firstly they inspect the roof and then fix the issue properly by using best techniques and tools.
#18
Posted December 29 2020 - 10:44 AM
I suggest you to consult with roof repair boca raton company for inspection of roof. Firstly they inspect the roof and then fix the issue properly by using best techniques and tools.
I suggest you do not advertise here!
#19
Posted December 29 2020 - 12:32 PM
Let the mods handle it. As you know we have forum sponsors that are out of business and are still being advertised.I suggest you do not advertise here!
Back to talking about guns!
#20
Posted December 29 2020 - 01:06 PM
Amazing - A guy tries to hijack a three year old thread with a push for a Florida based roofing company - on a "LONG ISLAND firearms" forum.
So...should I ever buy a house in Florida, AND have roof problems, I know who not to call.
And if Marcus sees my "mini rant", don't think "he is just being pissy about it" - I'm not. Really just trying to remind people of what used to be called "civility" and now we call them "rules".
I'm a real estate agent. If I met you someplace, and you mentioned you had a problem at your hosue, I wouldn't go with, "well, the house had probably gone to crap. Probably time to sell it. I can help you sell the house and buy a new one. Let's do that right now." That would be RUDE. Back in the day, a friend, coworker, or family member would quitly tell me - "Don't do that...it's rude...you just seem like a pushy bastard that wants to make money."
Actually, looking back at the post, it looks like you hired a company to randomly go out, make accounts, and post to foums trying to work in your company name and website. You probably paid at least $3 per placement, and in this case you went with a company that didn't know that the "516" area code was nowhere near the "561" area code. If you email them to compain, tell them, "it's like advertising in Mumbai for a business in Chennai" (you gotta keep your examples local to covey meaning...)
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