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Old 09-03-2012, 08:28 PM   #1
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Ridge Vent installation on a hip roof


The ridge vent slot in my new roof looks like it was cut too long. I have a hip roof and the manufacturer's spec [GAF] says the slot should end 12" from the intersection of the hip and ridge.

From inside the attic I can see that the slot ends about two inches from the hip/ridge intersection. So when the roofers covered the slot with the ridge vent and ridge shingles they essentially had to cover over the intersection, too. Now the end of the ridge shingles sort of extends over the intersection and sticks up at both ends of the roof line.

Aside from it not looking good [which I can live with] I'm concerned that it might cause problems in the future---e.g. leaking or some other problem I haven't thought of yet!

Is this a structural integrity issue that can potentially cause problems for me in the future? Should it be corrected or can I leave it the way it is?

Thank you.
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Old 09-04-2012, 09:09 AM   #2
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Ridge Vent installation on a hip roof


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Originally Posted by Projectsgalore View Post
The ridge vent slot in my new roof looks like it was cut too long. I have a hip roof and the manufacturer's spec [GAF] says the slot should end 12" from the intersection of the hip and ridge.

From inside the attic I can see that the slot ends about two inches from the hip/ridge intersection. So when the roofers covered the slot with the ridge vent and ridge shingles they essentially had to cover over the intersection, too. Now the end of the ridge shingles sort of extends over the intersection and sticks up at both ends of the roof line.

Aside from it not looking good [which I can live with] I'm concerned that it might cause problems in the future---e.g. leaking or some other problem I haven't thought of yet!

Is this a structural integrity issue that can potentially cause problems for me in the future? Should it be corrected or can I leave it the way it is?

Thank you.
I always start 12" off the rake and hips.Yes yours looks like pooh but as long as they did not cut deep into the truss,other than a visual discomfort from a structural stand point its not an issue.

As far as living with an improper installation and paying for something your not happy with is your choice.But for me I would not.
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Old 09-04-2012, 04:48 PM   #3
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Ridge Vent installation on a hip roof


Thanks for replying.

What actually concerned me was the potential for leaking since the ends turn up. The wind might blow rain up and under the end of the vent. I was also concerned about the possibility of the shingles at the ends of the ridge blowing off in a high wind.

Do you think that's anymore likely than if the ridge was shorter?

I also hadn't considered the cuts made to the trusses. These pictures were taken from inside the attic. Do the trusses look like they've been cut too deeply?
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Old 09-04-2012, 05:21 PM   #4
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Ridge Vent installation on a hip roof


The wood is cut correctly. I'm sure you'll be OK. Here of pix of how it's supposed to be done. The wood cuts always stop 12"-16" from the end, depending on where the last rafter is. The tops of the last shingles stay intact to seal the area while the rest of the shingle is cut back for the venting.
On a hip roof, you can't avoid some hump with 4 layers of shingle coming up each hip right at the peak.

http://www.albertsroofing.com/Ridge%20Vent%20Detail.htm
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Old 09-05-2012, 04:47 PM   #5
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Ridge Vent installation on a hip roof


Well it's a relief to know that they didn't cause any structural problems.

I'm OK with the hump of several layers of shingles coming up each of the hips to the peaks. It's the fact thay they went over the hump with the ridge vent and even more shingles (when they should have stopped at least 6" away from the hump) that's the problem.

That's why I'm still a little concerned about possible leaking or blown away shingles. I know anything's possible but do you think that's likely?
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Old 09-05-2012, 06:51 PM   #6
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Ridge Vent installation on a hip roof


Probably the same odds as a plane hitting your house.
The hump can't be avoided. Try laying one out sometime and you'll see that removing enough layers to avoid a hump WILL cause a leak because you remove the ability to wrap the hips/ridges.
The roof looks as if it's correctly done and the only way to determine anything different is to destructively dissect your roof. I don't think you want to go that way.
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Old 09-05-2012, 06:52 PM   #7
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Ridge Vent installation on a hip roof


BTW, on a straight gable roof without the difficulty of factoring in hips, the way pros do it as demonstrated by the link is how to avoid a hump, but only on that straight run.
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