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TOPIC: General Discussion

Leak in Metal Roof

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My Apartment building has a metal roof that was installed 10 years ago. Pitch is 1:12. Not sure of composition of metal(probably galvanized) other than it is not aluminum. It was sprayed white at the factory and installed over asphalt rolled roofing. Recently developed 2 leaks in unfinished storage room which is at the low end of the bldg. Advised by contractor friend to caulk all seams and screws with Quad OSI caluking. This stopped one leak but other leak remains which is 4 ft from the side edge(capped) and 9 ft from the lowest(guttter)edge. At high(capped) end, added new foam btwn ridges but did not caulk around foam. Question. Should i re-caulk all screws and seams(they look good) or apply some type of elastomeric membrane over entire roof and if so what type and brand. If I were to re-caulk, should I stick with the Quad Brand or can you recommend something better. Must be avail. in clear or white. Thanks for your help. Tom
tom bradley

8/21/2007
I would re-caulk with a terpolymer butyl rubber sealant. Todd Miller
Todd Miller
Isaiah Industries, Inc.

8/23/2007
I spoke to Tech support at NPC then purchased #900 Solar Seal. Excellent support from this company.The Terpolymer Adhesive/Sealant is same formula as #900 product but dries faster, will take rain in 4 or 5 hours. #900 requires overnight drying. Apply heavy bead with either, dont feather. They also suggested I try a Peel and Seal type product which lead me to Eternabond. On their site, they show a video of an entire metal roof of a commercial bldg that was sealed with RoofSeal, looks impressive. Todd, what do you think of products from Eternabond ? My roof repair starts Sunday. Thanks Tom
Guest User

8/31/2007
I have not worked with it but I understand it and would say it should be good. Todd Miller
Todd Miller
Isaiah Industries, Inc.

8/31/2007
Tom, You didn't say what type of panel it is. You mentioned screws, so I assume the panel is a thru the panel fastened. In this case, just caulking at the seams usually will not get rid of your worst leaks. With a 1/12 pitch, you need to undo the laps, seal between the two metal laps and then put lap (stitch) screws in the laps to keep the laps together while the sealant cures. This should fix you up. Wade
Guest User

9/11/2007
Thanks. Todd Miller
Todd Miller
Isaiah Industries, Inc.

9/13/2007