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TOPIC: Installation

Leaks and lose screws

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I had a 26ga. Ag style (exposed screw) roof installed in 2013 to replace three tab singles. 30lb. synthetic felt is on the 1/2" 5 ply roofing with the metal attached with 1-1/2" sheet metal screws. In 2016 I noticed water marks around several protruding screws. In 2017 the contractor retightened screws and 2018 they went from seeping to leaking. I have a proposal to replace all 3000 #12 sheet metal screws with #14 metal to wood screws and epoxy any that do not tighten. Will this provide a leak free roof for 30 to 50 years? Or do I need to replace with standing seam?

Don Shank

1/29/2019
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I have opened up for comments but will defer to companies who manufacture these panels.

Todd Miller
Todd Miller
Isaiah Industries, Inc.

1/29/2019
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Seems that no one wants to touch this problem with an experienced answer.

Don Shank

2/12/2019
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Don,

Have you contacted the panel manufacturer? They would be the first person in the chain of custody to tell you what is recommended and an approved practice.

Exposed fasteners are a very installation sensitive application and the range of error from under tightened to over tightened is pretty broad an covers a good bit.

In most cases where screws are being replaced, you remove the screws, go with 1 size up screw, and use a proper gasketed screw.

The fact that the roof is leaking after not quite 6 years is more indicative of a questionable installation than anything. I am not sure that I would have the same contractor out that installed a roof that has now leaked twice to attempt it a 3rd time.

Eric Novotny
Eric Novotny
An informed customer is the Best Customer!

2/12/2019
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