as my dad used to say "dumb, dumb, dumb"

[ericwlewis]

no explanation needed.

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[Jim Katen]

I see a plumbing vent that's been enlarged at the roof to prevent frost closure. Isn't this a common installation in your area?

[David Meiland]

Hard to tell, but did they cut out a chunk of rafter to run the pipe?

[ericwlewis]

Hard to tell, but did they cut out a chunk of rafter to run the pipe?

Yes, they could have run it anywhere but chose to run it through the rafter.

sorry bout the picture, it's obvious to me because I took the pic.

[Jim Katen]

Hard to tell, but did they cut out a chunk of rafter to run the pipe?

Yes, they could have run it anywhere but chose to run it through the rafter.

sorry bout the picture, it's easy to see because I took the pic.

Oh, yeah, now I see.

But I'm still curious. Is the enlarged vent a common practice in your area?

[ericwlewis]

Hard to tell, but did they cut out a chunk of rafter to run the pipe?

Yes, they could have run it anywhere but chose to run it through the rafter.

sorry bout the picture, it's easy to see because I took the pic.

Oh, yeah, now I see.

But I'm still curious. Is the enlarged vent a common practice in your area?

Yes, unless it's a handyman's work or on one of those cheap little panel built houses.

[Chad Fabry]

Enlarging the vent to the required minimum of 3" beginning at least 18" below the roof line is common in my area and so is enlarging the vent directly below the roof surface which creates other issues. I've found more than a handful all snotted up with leaves and sticks- the shelf creates a handy place for birds to nest and for bees to get busy.

A frost closure will fix itself, but birds don't tidy up when they're done with the nest.

I'd rather see a 2" vent than an improperly enlarged vent.

[ericwlewis]

I've seen several with debris collecting inside as well. Lowes has a "mushroom cap" that installs on the top but do you think the 1/2" gap it leaves could frost over?