Roof vent flashing

[AJP]

Any advice on dealing with a bad roof vent stack boot...looks like (from the ground) there is aluminum flashing over a rubber/neoprene boot (ie the boot protrudes through the flashing) and the boot appears to be disintegrating (south side exposure) ... I plan to get up on the roof in the morning....clinging to the eves trough with white knuckles hoping one or two trips will be all I will have to make. Shingles were done less than 10 years ago - complete roof ripped off and re shingled. It is cold here and I imagine the shingles are pretty brittle..
thanks for any tips!

 

[crzrcrzy]

you should be able to find the right size rubber boot at the local harware store. ive had to change them out when doing a re-roof. if the flashing job itself is screwed you may have to wait for warmer weather to fix it so ya dont destroy the shingles. or call the roofer who did the job maybe he'll warranty the work. prolly not bur it dosen't hurt to check. good luck. hope its not to big a PITA.

 

[creature]

What direction does the roof slope face? West or south facing with lots of sun can deteriorate the rubber on the vent stack flashing faster than the shingles. Is it leaking? Or does it just look bad? If it is leaking, you can do a temporary fix around the top of the boot collar with roofing tar...the stuff that comes in a caulk tube. Keep it inside until you head up on the roof. Warm tar will flow out of the tube better than cold. And get the stuff that can be applied in wet or dry conditions. Then when the weather warms up, replace the whole boot. You will need to R/R some shingles for this. Good luck.


Dave

 

[-Spike-]

Use some fiberglass mat under the 'tar'. The mat is sold in the roofing supply aisle in Home Despot along with Henry's products, it looks like (and is probably identicle to) fiberglass drywall tape, but wider. Or, just use the drywall stuff. If it were me, I'd smear some 'tar' on the boot, wrap it with the mat, then smear some more tar on there and call it a permanent fix. It'll outlast any rubber.

-Spike

 

[GeoRoss]

You can also use silicon gutter caulk on the rubber boot.



I agree with Spike on the tar and fiberglass mesh tape. Tar-flashing-tar-mesh tape over the edge of the flashing-more tar. Be sure to try and keep things sloping away from the flashing so there is no ponding.

 

[Koffer]

If its too cold and you just want to do a temp fix till its warner out just buy a replacement flashing with the rubber boot and side it over the old one . It will act as a umbrella and keep the rain out till you can fix it right

 

[AJP]

Thanks for all the excellent advice... had a closer look and there is only a rubber boot no metal flashing as I thought... the boot sits under a lot of shingles unfortunately ... they put it on when they re shingled and it is well covered right to the pipe top and both sides... unfortunately it is a South exposure and badly deteriorated ... I may just try putting the new boot (I found at Home Depot) or the "cone" part over and sealing as best I can. I am pretty sure I will break shingles if I try to lift them and I don't want to go there right now... temp sitting around 0 Celsius (32 F)