Black roof on pole barn?

[Piggywutz]

In the spring my wife and I are building a new home on a piece of property that we previously purchased.

She has a dark color palate picked out for the house. Grey siding, black shutters and shingles.

I am building a 30x40 pole barn on the property as well. I would like to match it to the house color wise. That would mean doing the roof in black metal. I am concerned that this could really turn the garage into an oven in the summer.

I am wondering does anyone here have a black roof on a pole barn and what is it like in the summer time?

 

[Kpaige]

Color of the roof is a wives tail. I studied this and tested it in very controlled testing. The temp difference is neglagable. Asphalt no matter what color absorbs heat at the same pace regardless of color. Make sure you properly vent the structure and you are good.

Haters can argue but This is my area of 22 yrs as an expert in the industry.

 

[manwithtools]

OP asked about pole barn. I assume black metal roof, not asphalt. Anyone have any evidence one way or the other with metal roof's? Just curious because I installed a charcoal metal roof this fall and I'm wondering about darker colors too.

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[Kpaige]

Yep did not catch that.
I would still say the diffrence would be neglagable.

 

[Brad Beam]

Mine is black, and currently not insulated it is not that bad in there during the summer

 

[rburke65]

I didn't know wives had tails?

 

[manwithtools]

Most don't, but the ones that do generally have horns and they should be avoided

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[Autorotica]

I didn't know wives had tails?

Split tales...

Build the building with additional height to keep the heat farther away from you. You can always put in a ceiling and keep the heat up above it.

Chris

 

[weadjust]

Asphalt no matter what color absorbs heat at the same pace regardless of color.

When I was a kid we would walk barefooted a mile or so to a swimming pool located on a college campus. When walking across the parking lots it was always much cooler on the feet if you walked on the painted parking stripes than the black asphalt. That is the extent of my controlled testing.

 

[dieselnut17]

I have a 24x32x12 with black roof and grey sides, I don't think it would make that much of a difference being a lighter color.

 

[bullnerd]

My 3040 pioneer pole building is clay color with a white roof. After it was up and sat in the sun I would climb up and put my hand on the bottom of the sheetmetal roof and then on the clay siding from inside, just because I was curious. The clay siding was always hotter. I asked one of the builders and he said they can definitely tell the difference when working inside one (up near the roof) with a white roof versus a dark roof. He mentioned the average temperature difference, but I forget what he said, wasn't much though. I would say It depends on what your plans on for finishing the inside and like was mentioned, if its vented right, should be good. I went with white because I wanted everything working with me to keep it cool, not against me.

 

[rsanter]

I think a lot of it is where you live and how much sun exposure you are getting.
In California or Arizona I think you will see the difference.

There are material that have ' cool roof coatings' that you can have the darker material and it reflects the Suns energy verses adsorbing it.
The other option is that you can make a double roof of sorts. You can skin the roof in osb or other material. Have stand offs to have a gap to the top roof and have venting top and bottom. It then acts like a flue and the hot air will escape verses building up in the building

Bob

 

[pmiranda]

The black will probably fade faster than a lighter color.

 

[triple0beretta]

Just finished this one a few months ago. I don't think the color is gonna make much difference. I'm plan to insulate mine. Right now it gets pretty cold in there.

 

[cajunfirehawk]

http://www.metalroofing.systems/metal-roof-colors/

http://www.metalroofnet.com/metal-roofing-blog/bid/68733/Best-Colors-For-Metal-Roofing

http://greenhomeguide.com/know-how/article/three-ways-to-make-your-roof-more-energy-efficient

 

[Piggywutz]

Thanks for all the replies guys.

Triple0beretta your building is pretty much the exact color combo that I am thinking about.

Down the road I am planning on insulating the building as time permits.

I am more concerned about heating in the winter vs cooling in the summer. If it's too warm in the summer I can always open a door if I'm out there working. In the winter maybe the dark color roof will help me out just a little bit.

 

[triple0beretta]

Thanks for all the replies guys.

Triple0beretta your building is pretty much the exact color combo that I am thinking about.

Down the road I am planning on insulating the building as time permits.

I am more concerned about heating in the winter vs cooling in the summer. If it's too warm in the summer I can always open a door if I'm out there working. In the winter maybe the dark color roof will help me out just a little bit.

So far the building watms up pretty when the sun hits it. Once the temp drops it cools down quickly. I'm working on a insulation plan now. I can't decide what I want to do yet.

 

[kbs2244]

With a continuous ridge vent you should be OK
Both now and when you put in a celing.

 

[Cyberbear]

Test it for yourself and see the difference between colored roof covering samples, then let us all know the truth.

 

[matt_i]

If its a heat penalty during summer its going to be a heat bonus in winter. Thinking the summer heat is easier to deal with than lack thereof during winter.

 

[CNGsaves]

Depends if your shop will be in full sun, or shaded by trees during summer.

If you have lots of south-facing roof and do go with the black roof . . . .
. . . . . I'd sure look into possibility of SOLAR . . . .

. . . . . . . there is no question from PHYSICS . . . .
. . . .
. . . . . . . . . . that Black roof is indeed Hotter than white !!

 

[maxpower_hd]

For what it is worth...I noticed a difference in my attic when I changed from black shingles to white, or almost white. Although I didn't do a scientific analysis. It was more of a seat of the pants kind of thing. Definitely cooler in the summer with white shingles.

My black truck was the same thing. It would be too hot to enter in the summer. Now I have a white truck and same thing. No issues when I get in. Here is a link.

http://www.norbord.com/na/blog/effects-of-roofing-shingle-color-on-energy-efficiency

 

[Kpaige]

I would take a couple samples of the colors you are thinking maybe 12x12 set them in the sun together give it an hour or so check it with a temp gauge the kind you can just point at the sample. That will give you your awnser and is just interesting to do.
Many people argue all kinds of this stuff. I had a crew installing vanilla siding on a building a few yrs back it was the time of year where it could be 10 degrees in the morning and 60 by afternoon. They were installing the siding pretty tight. They argued to me it does not expand that much so next morning I took one piece and set it in the driveway kept another piece tucked away in the shade at around 10 I laid them next to each other the warm one was 1/2" longer did the same thin at 3 this time 1" longer times that by 60 ft or more and you get a lot of movement.

 

[Kpaige]

I would take a couple samples of the colors you are thinking maybe 12x12 set them in the sun together give it an hour or so check it with a temp gauge the kind you can just point at the sample. That will give you your awnser and is just interesting to do.
Many people argue all kinds of this stuff. I had a crew installing vanilla siding on a building a few yrs back it was the time of year where it could be 10 degrees in the morning and 60 by afternoon. They were installing the siding pretty tight. They argued to me it does not expand that much so next morning I took one piece and set it in the driveway kept another piece tucked away in the shade at around 10 I laid them next to each other the warm one was 1/2" longer did the same thin at 3 this time 1" longer times that by 60 ft or more and you get a lot of movement.

 

[jives]

When I built my shed I installed black asphalt lap siding, and could only do it in the morning because by afternoon it was too hot to touch. Later in an addition to the shed I installed grey 3-tab asphalt shingles and they were safe to touch in the same sunlight.

The laws of physics involving heat absorption/reflection on dark/light surfaces is hard to overcome. But, other factors influence the rapid dispersal of the heat. A thin metal roof will give off the heat very quickly, which is one reason why black metal it is used in solar collectors, that then transfer the heat to another medium (air or water).