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I recently had a new metal roof put on with the screws in the flat areas. My neighbor saw it and said that the screws should have been put in pre-drilled holes in the tops of the ridges because it has been discovered that the flat area installation will leak within 3 years. My screws do have the cap and rubber type washer. What are your experiences. Thanks.
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First and foremost, I would contact the manufacturer of the roofing if I were you.
However, in my experience, the biggest "no-no" in this area would be to install the screws down in the small, pointed "valley" between two V-Ribs. Installing them in the larger "flat" areas of the panel profile is considered acceptable by many in the industry.
8/10/2002
Or copy this URL: https://www.metalroofing.com/spirit/comment/828/find/Isaiah Industries, Inc.
8/11/2002
Or copy this URL: https://www.metalroofing.com/spirit/comment/829/find/8/19/2002
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