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Would like to know if a repair collar is available for a vent pipe roof flashing?

My vent pipe flashings are leaking due to cracking of the rubber donut which slips over the pvc vent pipe. The metal flashings are fine, only a couple years old, but the rubber is badly deteriorated. A web search mentioned that a repair collar is made to slip over the vent pipe so that you do not have to tear up the shingles to replace the entire metal unit. I have checked with plumbing supply houses but no one has heard of it. Does anyone know the manufacturers name of this repair collar or where I could buy it.

Public Comments

  1. I know for a fact that Menards and Home Depot carry vent pipe roof flashing. It just slips over the vent pipe, you tuck it under the upper shingles and run some sealant over the rest. Job done. Go to the plumbing department there and tell them your problem and they will fix you right up.
  2. I had the same problem but my roof is so steep I could not walk on it. I bought a can of Great Stuff and sprayed it into the vent pipe flashing from the attic and it actually stopped leaking. I am not sure how long it will last.
  3. Buy a new aluminum vent cap at your local home center. Cut off the square part so it is round. Put flashing caulk on the old riser part of the flashing and slide the new one over the whole thing. Use tin sheers and cut about 1/2 inch off the bottom of the new riser. The flashing caulk will hold the new riser down .
  4. try your local roofing supply house for the repair collar, i've seen something like what you are describing at them. i think that they are designed for going over the old cast iron waste pipes on a re roofing job, where there is a large cast hub above the roof. you may have to trim the pipe to get this to work though. i haven't used them myself, and would recommend that you pull the nails and remove some shingles then just replace the flashing. if your shingles are only a few years old, you should be able to do this. all that you would need to do it would be your hammer, a flat bar, and maybe a mini flat bar, too. start with the row of shingles two rows above the flange, pull the nails from those shingles, then the row directly above it, and remove that shingle. now you can work your way down the sides of the flange until it is clear, then remove the flange itself. make sure that you have the correct size new flange for your size pipe, and that there isn't any silicone or tar on the pipe itself, then install it. we sometimes add a bead of silicone around the pipe after the flange is nailed down. the just install the singles again, in the reverse order of their removal. good luck, hope it all works out for you.