Replacing rotted boot gasket on roof flashing

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  #1  
Old 07-28-15, 05:11 PM
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Replacing rotted boot gasket on roof flashing

Hey all, both of the vent pipes on my roof have flashing around them that is in pretty bad shape. Not sure how old the roof is, but at least 10 years old I think.

Is the Perma Boot a good solution here?

Also, from my pictures it looks like the flashing may be installed backwards (if that is possible) since the front lip of the gasket seems raised higher than the back. Does that look wrong to any of you pros here?

Finally, I imagine I need to climb up into the attic to see if there is any damage since I'm sure there has been a ton of rain leak in god knows how long its been (we just bought the house in November). Does the insulation need to be replaced if it has gotten wet? Just look out for mold? The insluation is rolled pink stuff.

Thanks for your help.

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  #2  
Old 07-29-15, 08:41 AM
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I would replace the vent pipe flashing with a new one. It's pretty easy to replace the pipe flashing and regular ones are less expensive then Perma boots. Also, the old one is rusting and will eventually stain the roof. A Perma Boot would help with keeping water out but may not prevent the rust staining.
 
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Old 07-29-15, 03:56 PM
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Thanks Dane, but if this repair just costs me $36 for a couple of perma boots, it is not worth the cost savings, whatever they might be, to pull up shingles that might have to be replaced (and may be discontinued) and possibly screw up the install due to lack of familiarity, plus the time it takes to learn how to do it properly and then get 'er done (Perma Boot installs in seconds).

I am not worried about the rust since it is back yard and the roof will be completely replaced in a few years anyway.

Does the existing flashing look like it is installed correctly to you? I am worried that the lip of the metal might be too low to keep water from running over it and around the bottom of the boot. Is that just the way they are made?
 
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Old 07-29-15, 04:28 PM
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I agree with Perma Boots as a solution. You may have to trim the pipe for the cap of the Perma Boot to fit snugly, but it is a great work saver for any pitch roof. Perma-Boot Pipe Boot Repair for 3 in. I.D. Vent Pipe Black Color-PBR 312-3BK - The Home Depot
 
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Old 07-30-15, 07:44 PM
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Thanks chandler and I agree. I actually did this repair yesterday and those guys aren't joking when they say it is easy as pie. I was up on top of my roof for probably 15 minutes and got both of them on there.

Funny you mention the pipes and having to trim. I actually had the opposite problem. I don't know what material these pipes are but they aren't standard PVC as the ID and OD are nearly the same (the "wall" is paper thin). The 3" one fit pretty good but the 2" one was a little loose and I had to shim it up a bit. It's possible I may lose one of them in the next heavy wind storm, but we'll cross that bridge when we get to it.
 
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Old 07-30-15, 08:11 PM
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Based purely on the color, looks like the vents are copper which is pretty much unheard of. I saw it a couple of times back in VA on really old homes, but never on anything less than 60-70 yrs old att.

No one else responded to the orientation of the flashing, but I also think it looks basackwards. Maybe not, since the angle matches the roof though? Seems like the higher area would make more sense at the top doesn't it?
 
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Old 08-02-15, 02:54 PM
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Yeah I'm not sure about the flashing--it could have just been the angle of my camera. I've never actually seen one in person uninstalled, so I wasn't even sure if there was a correct orientation or if it was just level in hand and the pitch of the roof was creating an optical illusion. Oh well the perma boot actually goes over it anyway so it didn't end up mattering. Thanks for looking at it and your thoughts though GunGuy!

The pipes felt like some sort of plastic to me but they are very old and it is untelling the actual material. House was built in 1963.
 
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Old 08-02-15, 05:32 PM
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Well, they could be plastic, though I think 1963 is a bit early for plastic pipe if they are original. And I just realized you are in VA so my thought of copper seems a bit more possible.

I've seen all sorts of drain and vent pipe over the years and I'm no Pro. You know that once they made drain pipe out of basically tarpaper heated and compressed under pressure? It was allowed by code for about 3-4 yrs IIRC. Very thin walls but over time they got extremely brittle.
 
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Old 08-02-15, 09:56 PM
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Heater tar paper?!?!?

Jeez and I thought that orangeburg stuff was crap!!
 
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Old 08-02-15, 10:33 PM
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That actually may have been what it was...the plumber that fixed it at the rental I was in called it tarpaper pipe. He actually showed me how the layers just got brittle and delaminated.
 

Last edited by Gunguy45; 08-02-15 at 11:10 PM.
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