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I made a fair living for a while just fixing other roofers’ mistakes, and plumbing vents were usually one of the items needing repair. Other items included replacing valleys and the flashing of walls, dormers and chimneys. It was no fun chipping away the old goop that previous roofers thought was necessary, but they did keep me reasonably busy.

First, you need a plumbing vent flashing.


It’s just a formed piece of galvanized steel or aluminum, with a neoprene collar for the pipe.
You lay your shingles up to the pipe, deciding how much flasher you want to expose.


That looks about right. Next, install your flasher over the pipe.


Now, simply shingle around and over the flasher, cutting the shingle carefully with your hook knife to conform to the flasher’s contours. Leave a little room for the rain to wash.



Then you can move on to larger items.


See? No tar. Just a dab of caulk is needed for the exposed fasteners.

Thanks to Pete Staples and Don Allen for patiently teaching me this trade.

Today’s work was cut short around 1500 hours by the rain that was forecasted, along with some winds. I think the technical term to describe today’s wind is “blowin’ like snot”.






  1. Blowin like snot here too. Unfortunately today it’s taken -10c and turned it into a windchill of almost -30.

    • Brrr!
      The cold front that passed through around mid-afternoon dropped our temps very quickly about 10-15 degrees F. Add the 30+ mph breeze and spotty rain, well, put a fork in me.

      • Killing time waiting for propellers to arrive for the new carbon fibre drone. Watched some exceptionally inspiring videos about boats and drones.
        I think there will be a LOT of time at the lake this summer filming people who don’t like them!

      • Well, if you get bored of killing time, there’s plenty of work down here in Tucson.

        A drone would be great for eyeballing your way through an area with lots of underwater obstructions.

        Is there a 12/24 volt charging system for drones, or what?

      • The charger is a 6a 120v unit. These batteries won’t likely charge on the boat.

      • There are smaller ones that have decent cameras that are easy to fly and charging could be done on the boat. The Tarot, with a wingspan of over 4′ with two batteries that draw 6a each for about 20 minutes could wreak havoc on the house bank. 🙂 not to mention the lack of open space to launch and retrieve. There would be no mistake with 6 carbon props, they’ll take fingers off quite easily. I’ll not be close when they’re spinning!

      • One might have to build a helipad… 😉

  2. I’m glad to see someone using roof felt. I see a lot of so called pros around here (London Ont. Canada) not using anything! (Maybe one strip on the eves but that’s it!) That’s on new construction too!
    Funny how those roofs leak 8 years later and there isn’t a warranty because there is no felt… But it keeps another roofer working…
    Nice looking job Tom.

    • Thank you, Martin. There are a few things in the house I’d prefer to keep dry while the roof’s torn off, like the ceiling.
      IIRC, code in MI required an underlayment to extend a minimum of 3 feet beyond the interior wall, to help if an ice damming situation should occur.
      If your insulation and ventilation are up to snuff, ice dams are actually very rare.

      They’re even more rare in Tucson. 😉

      • Ontario code is like Mi. Here the shingle manufacturers warranty says that felt or underlay must be used all over. So all the new construction that I see has no warranty! Sad that that is being done to new home owners that don’t have a clue.
        Tucson… You have snakes. We have polar bears.

      • Unless it’s an ice dam, if water gets through to your underlayment, there’s a problem with the shingles.

        As to the entirety of the deck needing felt, I think the shingle manufacturers are in bed with the asphalt industry. 😉

        And I do love my snakes!

  3. WOW, you’re moving right along. Keep up the good work and thanks for posting the vent flashing post! THAT was most helpful if I ever need to do something like that!

    • You’re very welcome, Barb, and thank you. Except for the heavy lifting, the back-breaking efforts and risk of falling, roofing’s pretty easy.
      At least, that’s what I keep telling myself…

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