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Old 03-16-2010, 12:07 AM   #1
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ice and water shiled under metal roof


I want to get a metal roof on my house. I have gotten several estimates, 3 include ice and water shield. I am wondering if I need ice and water shield. I live in SC, so we don't get ice. I do have a low pitched roof though, which is why I was told that I needed ice and water shield under my metal roof. Whats your thoughts?

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Old 03-16-2010, 12:14 AM   #2
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ice and water shiled under metal roof


if it is the type of metal roof that has exposed screws i would definitely use a i&w type membrane,just make sure the installer uses one that can be used under metal roofing

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Old 03-16-2010, 12:18 AM   #3
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ice and water shiled under metal roof


why does the exposed screws matter, thats where i got confused. what will ice and water shield do for those?
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Old 03-16-2010, 12:43 AM   #4
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ice and water shiled under metal roof


because its just a matter of time before expansion and contraction is going to elongate the screw holes allowing water to get under the metal

the I&W will at least help keep it out of the house for awhile

imo your better off using a concealed fastener standing seam roof on a house and leave the exposed fastener metal roof on the barn where it belongs
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Old 03-16-2010, 07:13 AM   #5
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ice and water shiled under metal roof


A properly done standing seam roof has no need for underlay of any kind.
http://www.albertsroofing.com/Tin%20...to_gallery.htm

The exposed fastener type will allow water in around the screws.
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