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Covering a clear ridge cap on pole barn ? #6574049
07/14/19 11:43 PM
07/14/19 11:43 PM
Joined: Jun 2013
Posts: 1,311
Indiana
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kyron4 Offline OP
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kyron4  Offline OP
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Indiana
My 40x40 pole building has a clear polycarbonate ridge cap/vent that is 10" -12" wide. Makes it nice to have the natural light during the day, but in the summer it creates a green house affect and can really heat up the inside. As you walk through you can feel the hot spots where the sun is beaming through in the afternoon. It's great in the winter , but makes keeping things cool in the summer impossible. I know a metal building in the sun is going to get hot , but would replacing the clear cap with a sold metal one keep things cooler ? I thought about leaving one section clear to get some light in during the day. What about just painting over the cap , kind of a semi permanent fix to see the difference ? Any thoughts or advice ? -Thanks

Re: Covering a clear ridge cap on pole barn ? [Re: kyron4] #6574155
07/15/19 07:53 AM
07/15/19 07:53 AM
Joined: Aug 2010
Posts: 10,787
Asheville, NC
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charles Offline
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Maybe a ridge vent.

Re: Covering a clear ridge cap on pole barn ? [Re: kyron4] #6574252
07/15/19 10:57 AM
07/15/19 10:57 AM
Joined: May 2016
Posts: 3,491
Southern Illinois
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Foxpaw Offline
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Southern Illinois
Maybe you could take like a 4' strip of something like a silver tarp or a strip of that rubber like they use on rubber roofs (use white or paint white) Put that on and see if it makes any difference. And like Charles said you would need 2 or 3 vents. You could at least experiment with something not too expensive until you decide if it helps. Really I don't think its going to help that much. I know if you have to work top side of a combine under a roof, its best to do it early, no I mean real early in the morning.

Re: Covering a clear ridge cap on pole barn ? [Re: kyron4] #6574342
07/15/19 02:11 PM
07/15/19 02:11 PM
Joined: Feb 2011
Posts: 2,042
SE Kansas
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K52 Offline
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SE Kansas
Do what we used to do with glass green house. White wash it, just take some lime and water and mix it till you can brush it on with a heavy brush and forget about it. Put it on at the start of summer and by winter it will pretty much have washed off so you get the sunlight when you want it most. Very cheap and it works well.

Last edited by K52; 07/15/19 02:11 PM.
Re: Covering a clear ridge cap on pole barn ? [Re: kyron4] #6574345
07/15/19 02:30 PM
07/15/19 02:30 PM
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Posts: 18,382
Green County Wisconsin
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GREENCOUNTYPETE Offline
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Green County Wisconsin
does the roof have any insulation under the metal portion ?

if not take an infer red thermometer the type with the laser and on a warm day shoot the under side of the ceiling. even on white roof buildings with good ventilation , a vented ridge and 2 larger doors the under side of the steel may be 50 degrees hotter than the air temp

2 buildings next to each other one with a thin layer of insulation neither having any light coming through and the ceiling temp in the insulated building was 144 and the ceiling temp in the building with some insulation was 86 that is a 58 degree difference the two buildings were 15 feet apart both had all doors open the un-insulated building has large exhaust fans to try and clear the heat out but they just can't move enough air fast enough.

so while light might be causing warm spots an un-insulated ceiling might well be heating it up a lot also.

if it is primarily the sun coming thru the clear ridge , some shade cloth hung from the bottom of the trusses might dissipate the intensity enough leaving the shade cloth to heat up with air moving through it and exhausting yet leave you enough light to see and and reduce the warm spots on the floor.

shade cloth is also use on green houses in the summer to reduce the intensity of the light coming in , typically it is done over the top but it would be worth a try to do it from the trusses first and see how much it helps before you have to go for a walk on the steel and try and find a way to fasten it from to the roof

Last edited by GREENCOUNTYPETE; 07/15/19 02:34 PM.

America only has one issue, we have a Responsibility crisis and everything else stems from it.
Re: Covering a clear ridge cap on pole barn ? [Re: GREENCOUNTYPETE] #6574424
07/15/19 05:15 PM
07/15/19 05:15 PM
Joined: Dec 2006
Posts: 11,293
East-Central Wisconsin
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bblwi Offline
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East-Central Wisconsin
You could go to a farm store and buy two of those low cost plastic tarps that are 10 by 20 feet or so, or buy one and cut it in half and staple gun or fasten that up on the trusses or rafters in the spring and then unfasten one side and let that hang down in the winter so you have the cooler summer and warmer winter.

Bryce

Re: Covering a clear ridge cap on pole barn ? [Re: kyron4] #6574440
07/15/19 05:40 PM
07/15/19 05:40 PM
Joined: Jun 2013
Posts: 1,311
Indiana
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kyron4 Offline OP
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Indiana
It's a uninsulated metal building, and the clear "cap" is a ridge vent. It has the mesh filters running down both sides. Someone at work suggested plastic dip paint that can be peeled off if needed.

Re: Covering a clear ridge cap on pole barn ? [Re: kyron4] #6574506
07/15/19 07:32 PM
07/15/19 07:32 PM
Joined: Sep 2010
Posts: 2,213
NE
M
Marty B Offline
"arbitrary noob"
Marty B  Offline
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NE
Why not just get a set of 1x12's to put on the underside of the trusses right under the ridge.


Scab a 2x4 to the trusses where they spread out to 14" or so for a flat handy place to lay them. ( Like an A frame)

you can take them off in the fall, put them back up in the spring.

Re: Covering a clear ridge cap on pole barn ? [Re: kyron4] #6574557
07/15/19 08:39 PM
07/15/19 08:39 PM
Joined: Oct 2009
Posts: 7,249
western mn
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bucksnbears Offline
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western mn
Cieling fan run in reverse. Ridge vent.


swampgas chili and schmidt beer makes for a deadly combo

You have to remember that 1 out of 3 Democratic Voters is just as dumb as the other two.
Re: Covering a clear ridge cap on pole barn ? [Re: kyron4] #6574580
07/15/19 09:01 PM
07/15/19 09:01 PM
Joined: Jul 2009
Posts: 2,459
Oregon
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H2ORat Offline
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Oregon
Roof insulation and venting is the key -- I am amazed at the difference and even whether the roof is galvanized or white paintet.

Re: Covering a clear ridge cap on pole barn ? [Re: bucksnbears] #6574681
07/15/19 11:27 PM
07/15/19 11:27 PM
Joined: Jun 2013
Posts: 1,311
Indiana
K
kyron4 Offline OP
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Indiana
Originally Posted by bucksnbears
Cieling fan run in reverse. Ridge vent.


I have two ceiling fans running in reverse and a ridge vent. It was 91* outside today and almost 100* in the building.

Re: Covering a clear ridge cap on pole barn ? [Re: kyron4] #6574807
07/16/19 08:28 AM
07/16/19 08:28 AM
Joined: Dec 2006
Posts: 19,930
SEPA
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Lugnut Offline
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I think the cheapest, easiest way to block the clear ridge cap that is reversible would be to get five sixteen foot long 1 x (whatever width needed to cover one side of the ridge vent). Butt them together with screws and lay over the top of ridge vent. the fifth 1 X will be cut in half to form the cover for the last eight feet of ridge cap (16 + 16 + 8 =40).

Butted together they will form a 90 degree angle which I doubt would lay flat on your ridge (your roof would have to be a 12/12 pitch). but it will still work. If you have carpentry skills and want the cover to lay flat rip the proper angle on each edge before screwing together.

Attach with a minimum amount of 2.5"-3" metal roofing screws, like four or six per 16" cover, two or three per side. If it works and lowers the interior temp significantly you can do a more permanent solution like painting the clear cap or replacing it with a metal cap. If it doesn't make a big difference, simply remove. Be sure to put roofing screws into the holes left from attaching the cover.

1 x pine material is relatively inexpensive and can always be used for something in the shop.


Eh...wot?

Re: Covering a clear ridge cap on pole barn ? [Re: kyron4] #6574820
07/16/19 08:41 AM
07/16/19 08:41 AM
Joined: Feb 2011
Posts: 2,042
SE Kansas
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K52 Offline
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SE Kansas
Originally Posted by kyron4
It's a uninsulated metal building, and the clear "cap" is a ridge vent. It has the mesh filters running down both sides. Someone at work suggested plastic dip paint that can be peeled off if needed.


Whitewash it! Blocks the sun in the summer and Mother Nature takes it off in the fall. Doesn't get cheaper or easier than that.

Re: Covering a clear ridge cap on pole barn ? [Re: kyron4] #6574821
07/16/19 08:46 AM
07/16/19 08:46 AM
Joined: Dec 2006
Posts: 62,661
Minnesota
330-Trapper Offline

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I like Lugnuts idea


NRA and NTA Life Member
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Re: Covering a clear ridge cap on pole barn ? [Re: kyron4] #6574840
07/16/19 09:25 AM
07/16/19 09:25 AM
Joined: Sep 2013
Posts: 18,382
Green County Wisconsin
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GREENCOUNTYPETE Offline
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Green County Wisconsin
Originally Posted by kyron4
It's a uninsulated metal building, and the clear "cap" is a ridge vent. It has the mesh filters running down both sides. Someone at work suggested plastic dip paint that can be peeled off if needed.



an un-insulated building and your only 8-9 degrees warmer in than out your doing great. exceptional you must have a good ridge vent and a lot of doors open and good air flow.

white wash that clear cap or put up something high to block the sun from streaming in. but I will bet it doesn't help more than 2-3 degrees in overall building temp.


insulation is what is lacking , shoot the underside of the steel on a sunny day with an infer red thermometer and you will see your real issue , when the ceiling is 30+ degrees hotter than the air temp outside it is like trying to cool down an oven with the broiler still running you can open the door but it will still be hot.


America only has one issue, we have a Responsibility crisis and everything else stems from it.
Re: Covering a clear ridge cap on pole barn ? [Re: GREENCOUNTYPETE] #6574884
07/16/19 10:25 AM
07/16/19 10:25 AM
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Posts: 11,293
East-Central Wisconsin
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bblwi Offline
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If it is a vent then I would not suggest closing that off. Hot air rises and a pole barn with a 3/12 or 4 /12 pitch (the more the better) will create a chimney effect, especially if you have side doors open etc. If you notice that there are bands of hotter places down where you are walking due to sun penetration you can be sure that it is much warmer near the ridge cap. If you keep the shed closed up most of the time you are not letting the natural air system work and covering your ridge will have minimal positive impact.


Bryce

Re: Covering a clear ridge cap on pole barn ? [Re: kyron4] #6574888
07/16/19 10:40 AM
07/16/19 10:40 AM
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The great cage state Colorado
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Monster Toms Offline
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I would think 4-5' wide shade cloth hung in the truss 2-3 feet below the ridge would let light in, but difuse the intesity.

https://www.growerssolution.com/ext...msclkid=6076ace9873c1272d7d4f1c4661a637f






Re: Covering a clear ridge cap on pole barn ? [Re: bblwi] #6574896
07/16/19 10:57 AM
07/16/19 10:57 AM
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SEPA
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Lugnut Offline
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Originally Posted by bblwi
If it is a vent then I would not suggest closing that off. Hot air rises and a pole barn with a 3/12 or 4 /12 pitch (the more the better) will create a chimney effect, especially if you have side doors open etc. If you notice that there are bands of hotter places down where you are walking due to sun penetration you can be sure that it is much warmer near the ridge cap. If you keep the shed closed up most of the time you are not letting the natural air system work and covering your ridge will have minimal positive impact.


Bryce


For clarification; I was not suggesting he close off the ridge vent but that he cover the clear ridge cap. It would be difficult to close a continuous ridge vent even if he wanted to because of the nature of ridge vents on steel buildings. The flat ridge cap attaches to the high spots on the profile of the roofing panels. This create spaces between the low areas and the ridge cap that act as a vent. The spaces usually have a breathable, heavy matrix material that matches the roof panel profile installed under, and along the edge of, the ridge cap. The matrix allows heat to escape but excludes insects.


Eh...wot?

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