I have a leak in a flat roof that need patching. The roof is covered in EPDM. Only a small run of cedar shingle roof (5’X10′) runs onto it, but in heavy rains the water pools slightly around a seam and it leaks.
I have never repaired EPDM before. My plan is to knife the old seam to confirm that it is the source, clean the material around the seam and lay a new peice of EPDM across the surface — I have a large 24″ roll.
Any suggestions? Want should I use to bond the patch down?
Patrick
Replies
I can't think why you would want to put a knife in it. simply roll back the edge of the seam and see if there is a place where it parts free. The seam should have been done with EPDM lap cement and then caulked along that same edge with the caulk made for the product. Once you find the leak, you can make a patch the same way but cutr your materials down so it only lays beyond the flaw by 6-8" on each side. Clean the area of the roof and the contact side of the patch material with acetone or white gas and a rag rubbed on first.
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Ya wanna expound on the "white gas"? I am sure it aint what I get from eating collard greens.
Spheramid Enterprises Architectural Woodworks
Tommy, can you hear me?
Why look here?
That would be green gas.
Absolute worst.
Spheramid Enterprises Architectural Woodworks
"Yup, I really bought this place, wanna shoot me? Please?
What do you burn in your Coleman lantern?Oh yeah, you guys brew your own lightening down in them hills.;)
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I DO belive that is methanol.. I always had MEK on hand ( freebie from Uncle Sam)..but thanks for the lantern idea..mine are propane (G).
Spheramid Enterprises Architectural Woodworks
"Yup, I really bought this place, wanna shoot me? Please?
On review - you have puddling. how bad? If it doesn't evaporate in a day, it is too much. Puddled water will always find a way to leak. I wonder too, how carefuil the installers were with nails, tools etc when they shingled up from the EPDM. There could be a tiny pinprick hole elsewhere.
Since you have hadd puddled water there, it will be more dirty and slimey, so clean it all well, and make the patch piece run the length of the questionable seam as far as it is under water typically
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piffin
It does pool back of the seam which runs parrallel to the edge of the shingle roof about 12" from the edge -- amybe a 1/4" deep. But the leaking only seems to occur in heavy rains -- pretty common in the Pacific North West.
P
There is a roll of epdm roof edge . it covers the nail strip . Glues down /bonds with the epdm roofing .
Clean the seam check for a bad seam as Piffin said . then use the cleaner primer , place the strip and roll it down. It works like an innertube patch, only a long narrow one.
Thanks Don. I'll see if I can pick up this product locally.