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Old 04-02-2011, 03:47 PM   #16
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roof leaking 5 ft. below exhaust vent


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Originally Posted by ThatDaveGuy View Post
I think they're saying the vent lip should look this way:



The "downhill" lip should be on top of the shingle so water flows from upper shingle ~> vent lip ~> lower shingle. The way yours is funnels water under the edge of the lower shingles. Looks nice, doesn't work.
Yup. This is correct.
As you could see on yours, the water enters the roof at each lower corner.

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Old 04-02-2011, 03:47 PM   #17
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roof leaking 5 ft. below exhaust vent


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Donít you install the vent to the felt in the same fashion with the lower part of the flange over the felt with the felt over the top of the flange?

I would think is papered properly and roofed as shown it still shouldnít leak into the house. The water should run between the roofing and felt.
No, but on a lower slope roof (such as the OP's), I'd use some sort of peel & stick membrane to seal the sides and top to the underlayment. I'd probably also run a bead of roofing caulk around three sides of the hole and set the unit in it. With that valley dumping on it, a belt and suspenders approach is called for, IMHO.
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Old 04-02-2011, 03:49 PM   #18
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roof leaking 5 ft. below exhaust vent


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Donít you install the vent to the felt in the same fashion with the lower part of the flange over the felt with the felt over the top of the flange?

I would think is papered properly and roofed as shown it still shouldnít leak into the house. The water should run between the roofing and felt.
Water should always run over the shingle.

In any regard, the shingle job around the vent is incorrect. The right way to do it is shown in the picture posted above.
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Old 04-02-2011, 03:56 PM   #19
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roof leaking 5 ft. below exhaust vent


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Water should always run over the shingle.

In any regard, the shingle job around the vent is incorrect. The right way to do it is shown in the picture posted above.
I know this what Iím saying is just the vent installed with felt only shouldnít leak
.
I know that my prep alone on any siding job is enough to keep the house dry before the first piece of siding even hitís the wall.
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Old 04-02-2011, 04:28 PM   #20
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roof leaking 5 ft. below exhaust vent


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Originally Posted by kwikfishron View Post
I know this what Iím saying is just the vent installed with felt only shouldnít leak
.
I know that my prep alone on any siding job is enough to keep the house dry before the first piece of siding even hitís the wall.
Felt does absorb water though.

And, I don't think you can compare felt for siding vs. felt for roofing. Siding is vertical and thus water runs off easier than roofing, where water can back up.

I mean, you're asking for answers, but fighting the suggestions.
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Old 04-02-2011, 07:40 PM   #21
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roof leaking 5 ft. below exhaust vent





I'd have one more shingle lower covering that metal. The only part of that flashing that should show is the edges along the shingle in a slight stair step cut and the bottom. It would also need some nails on the bottom and some silicone on the nails(even though they never leak). I have seen vents put in like this picture that leaked.

I agree with seeyou that the OP's picture has a Broan range cover. They are about $50. Moving it to a new location is more important than a little rust on it though.

Get a roofer (a real roofer) out there to take a look. They should be able to find the leak.

I would bet the leak is farther up and getting under the felt somewhere by that cover. Then following down to a break in the sheathing, then poly(if there is any), then through your wood ceiling.
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Old 10-26-2011, 03:05 PM   #22
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roof leaking 5 ft. below exhaust vent


I'll be darned if I just didn't have my new roof put on a few weeks ago and put on a brand new Broan vent cover. It leaks. It leaks below it and far below it. The roofer came out and lifted the edge shingles a bit and put in some black lap. He then put it good around the edge where the shingles meet the vent cover. I'll test it tomorrow with the hose to make sure it doesn't leak. I'm a bit ticked off after spending all that money. I wish he would have just lifted all surrounding shingles, glopped that stuff under the vent edge, and then re-shingled with the black lap going under the edges better. He thinks it was running under the paper from the edge. The bottom is exposed as shown so at least it is installed correctly. I didn't have any leaks before I had a new roof put on, now I do, but the vent cover is new as the microwave exhaust fan used to just dump into the attic.
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Old 10-26-2011, 03:15 PM   #23
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roof leaking 5 ft. below exhaust vent


There should be a nice thick bead of roof cement on the top and side of that vent. What's stopping the water from getting between the shingle edge and the unit?

You don't need to replace the unit, but you need to remove and re-install it. It wouldn't take more than a tube of roof cement and four roofing nails in material and a 1/2 hour worth of time to set that right and watertight.
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Old 10-26-2011, 03:32 PM   #24
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roof leaking 5 ft. below exhaust vent


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There should be a nice thick bead of roof cement on the top and side of that vent. What's stopping the water from getting between the shingle edge and the unit?
Flashing. Same as wall flashing. It needs no roof cement or tar.
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Old 10-26-2011, 09:09 PM   #25
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roof leaking 5 ft. below exhaust vent


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Originally Posted by Pirateghost View Post
I'll be darned if I just didn't have my new roof put on a few weeks ago and put on a brand new Broan vent cover. It leaks. It leaks below it and far below it. The roofer came out and lifted the edge shingles a bit and put in some black lap. He then put it good around the edge where the shingles meet the vent cover. I'll test it tomorrow with the hose to make sure it doesn't leak. I'm a bit ticked off after spending all that money. I wish he would have just lifted all surrounding shingles, glopped that stuff under the vent edge, and then re-shingled with the black lap going under the edges better. He thinks it was running under the paper from the edge. The bottom is exposed as shown so at least it is installed correctly. I didn't have any leaks before I had a new roof put on, now I do, but the vent cover is new as the microwave exhaust fan used to just dump into the attic.
Using caulk around a vent ensures that water will enter and that it will leak. No 'roofer' would use caulk on it.
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Old 10-26-2011, 09:10 PM   #26
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roof leaking 5 ft. below exhaust vent


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Originally Posted by AGWhitehouse View Post
There should be a nice thick bead of roof cement on the top and side of that vent. What's stopping the water from getting between the shingle edge and the unit?

You don't need to replace the unit, but you need to remove and re-install it. It wouldn't take more than a tube of roof cement and four roofing nails in material and a 1/2 hour worth of time to set that right and watertight.
Remove it and reinstall it WITHOUT any caulk is what would be correct.
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Old 10-26-2011, 09:13 PM   #27
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roof leaking 5 ft. below exhaust vent


Roofers bring shingles and ice and water shield for a roof repair.

Handymen/carpenters bring caulk.
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Old 10-26-2011, 09:14 PM   #28
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roof leaking 5 ft. below exhaust vent


Originally, it did not have sealant along the edges. It leaked. Broan instructions call for sealant on the sides. I think the water was running sideways off the side flashing, under the shingles, and then under the paper to the plywood joint where the water dripped out. I don't that have that steep of a pitch roof so I could actually see this happening. I am a bit apprehensive to remove and try without any form of sealant.
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Old 10-26-2011, 09:19 PM   #29
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roof leaking 5 ft. below exhaust vent


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Originally Posted by Pirateghost View Post
Originally, it did not have sealant along the edges. It leaked. Broan instructions call for sealant on the sides. I think the water was running sideways off the side flashing, under the shingles, and then under the paper to the plywood joint where the water dripped out. I don't that have that steep of a pitch roof so I could actually see this happening. I am a bit apprehensive to remove and try without any form of sealant.
Pitch could be a factor, but if it's that low, it may be too low for shingles.

This one doesn't have Ice and Storm shield, nor does it have caulk. I had just reinstalled it in this pic. It's in view of the Hatteras Lighthouse and gets hurricane or tropical storm tested several times a year.
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Old 10-26-2011, 09:23 PM   #30
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roof leaking 5 ft. below exhaust vent


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Pitch could be a factor, but if it's that low, it may be too low for shingles.

This one doesn't have Ice and Storm shield, nor does it have caulk. I had just reinstalled it in this pic. It's in view of the Hatteras Lighthouse and gets hurricane or tropical storm tested several times a year.
That's a different type of shingle though.

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