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Old 09-24-2009, 10:27 PM   #1
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metal over old roof?


I have an old roof that had 3 layers of asphalt shingles and a bottem layer of wood shake shingles with 1x4 slats underneth is there any problem with me putting a metal roof directly over the slats or do i have to deck it over with plywood first?

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Old 09-24-2009, 10:54 PM   #2
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metal over old roof?


You should be just fine if the slats are sound, use a proper underlayment, and do the roof 100% properly.

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Old 09-24-2009, 10:59 PM   #3
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metal over old roof?


I'm assuming you are removing the 3 layers of asphalt & the shakes
or have removed already...."had"
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Old 09-25-2009, 10:24 AM   #4
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metal over old roof?


I appreciate your quick response, and I have torn off the other layers already. The slats are sound. Do you have any advice for which type of underlyment is the best/cheapest?
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Old 09-27-2009, 10:40 AM   #5
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metal over old roof?


Check with your metal supplier they seem to know what is best and for what application. I have the same issue and am going to strap the roof with 1x4's just because I don't want to sink a screw into one of the gaps between the old slat boards.
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Old 10-01-2009, 09:13 AM   #6
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metal over old roof?


Bronco2's issues/questions moved to new thread:

Metal roofing & insulation

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