Galvalume metal roof repair. | Ask The Experts Forum

Guest User 10/14/2004	Hi MRA. I have a two year old aircraft hangar with a 1/12 pitch galvalume roof. Some roof panels (28 feet long) were damaged due to flying debris during a wind storm. Is it a satisfactory practice to put new sheets directly over the old sheets without some sort of venting gap? I suspect that we may cause a corrosion / moisture problem between the sheets if we do not remove the old sheets. Also, Since we are in the Western New Youk area any trapped water / moisture will freeze, perhaps pushing panels apart. What do you think. Is it unreasonable to remove the old sheets. Or is it a bad practice to put new sheets on top of existing sheets with out an air gap. Thank you. Doug....	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/4320/find/
Guest User 10/15/2004	There really is only one answer to this question -- go back to the manufacturer of the roofing and make this inquiry, Do not proceed without their authorization. I do not want to give you advice here which might be different than what they say. Products should be used and installed only in accordance with the manufacturer's specifications.	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/4321/find/

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