Snow Sliding Off Of A Metal Roof? - Building & Construction - DIY Chatroom Home Improvement Forum

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Old 02-24-2008, 04:49 PM   #1
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Snow sliding off of a metal roof?

Hi Guys,
For a standing seam metal shed style roof, colored white and angled down to the north, how low of a slope will snow slide off of on its own?

Thanks in advance for your help.
Solar Dave


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Old 02-24-2008, 04:59 PM   #2
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Doesn't happen here often but anything above a 2/12 will slide with the right conditions. If you do a search for "ice dams" or blocks, you will find many types available if you have an issue...they can save a life.


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Old 02-24-2008, 06:03 PM   #3
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There is a limit on how low a pitch you can apply a standing seam roof.
I think 2/12 is the lowest.

But,to answer your ?,
I have installed the EDPM on 2/12 pitch,and yes the snow will slide off with the right conditions as joasis stated.
Seeing there is probably less resistance with the metal roof,I'm sure it's possible,even on the north side of a white roof.
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Old 02-24-2008, 06:04 PM   #4
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Not fast enough if your in snow country,, Just after it sags and breaks the roof down is also common, Mostly depends on where you live. Florida,not so much ,,,Alaska 6/12,,,well maybe NOT. here in frozen midwest wouldnt build a metal roof under 4/12 and 5 or 6 /12 much prefered. IF you compare materials cost for the steeper,,,very little difference to go steeper,,,actually depending on dimensions maybe the same!! AND figuring more slope MAY save on under construction support costs!!

So quick answer,,,more info needed!! 3/12 and under,,,figure on problems and leaks!!
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