Software
Houzz Logo Print
helpmehelpthishouse

Roof vent leak help!!!

Hi all,

In an effort to prevent condensation in our attic crawl space where our air handler sits, we had a roof vent installed (professionally). Pic attached.

I have two problems. One, the company didn’t really discuss aesthetics with us, and this is on the front of our house. It has to be because that’s where the crawl space is (the rest of the attic is finished and used by us) but it definitely stands out from a cosmetic perspective. It’s not horrible, just noticeable. We were thinking of maybe painting it a dark gray matte color to blend better with the roof (our shingles are a weird gray/blue…previous owners made weird decisions…).

But to the now more epic problem…first rain after installing this, and it LEAKED.

So now I have an uglier roof, and a new problem. Tried to solve one issue and created two new ones!

The guy came back to fix the leak. He said he put lots of “glue” around the opening to seal it better, but I’m really not confident as this was the same guy who installed. It’s supposed to rain again today….not sure if this actually worked.

I have a second, more reputable company coming in a few hours. I want them to check the work, give their opinions, but at this point I feel like ripping out this vent entirely, patching the roof, and calling it a day. I can’t see myself not worrying about this down the road.

I could handle the cosmetics not being perfect, but it can’t be ugly and not-functional for the problem we had.

Really need some advice!

Option 1…Keep the vent, have another company ensure it’s leak-proof, maybe paint it so it’s not as noticeable…

Option 2…scrap the vent, remove it, patch the hole (properly), maybe install it on the side of the house instead…

(A dehumidifier wasn’t ideal for the space for a few reasons which is why we did the vent)

Help!

Comments (30)

  • 3 years ago

    Get the installing company back to fix the leak - it's not rocket science! If they can't/won't fix it, get someone else.

  • 3 years ago

    I did, like I said, they came back and put a bunch of glue on it and said it’s fixed. I don’t really trust them so I’m having another company come to assess. But given the aesthetics and now this leak issue (which I will worry about now anytime it rains) I’m wondering about taking it out entirely.

  • 3 years ago

    See what the new company says. Its really not that ugly, although, I would have put the vents in the side of the house, rather than on the roof. It looks like they put it on top of the shingles, instead of lifting the shingles to go over the top flange etc. Have the new company check it out. It shouldnt leak, if installed right.

  • 3 years ago
    last modified: 3 years ago

    Does your HVAC guy recommend you vent the roof? If so did he suggest this or what type did he suggest? And that type of vent goes under the shingle, attach to the deck with the shingle installed over the top so really gives me more concern.

  • 3 years ago

    Thank you! Yes I said ugly but it’s not, it’s just very noticeable. Which, I could live with, but not if it also leaks! He def went over the shingles because you can see the line of shingles on the interior!!

  • 3 years ago

    Yes! This was the recommendation from our AC people, and they’re a whole home service company so they sent out the guy to do the roof part, it’s someone they always work with, but I think he’s more carpenter and not specializing in roof stuff from what I could tell. I literally told them I was very concerned about leaks before they did this, and they assured me he is detailed and great and that this wouldn’t happen! Ugh.

  • 3 years ago

    I really think the issue is they installed over shingles and not under. That would really explain it, and in which case the glue isn't going to cut it, and the new company could fix it or just remove it and patch. I'm leaning towards the latter because I will never stop worrying about it after this. Ughhhhh why do I trust people when they say they'll do a good job why why why.

  • 3 years ago
    last modified: 3 years ago

    "I really think the issue is they installed over shingles and not under."

    100%. The reality is that installed properly the "glue" as you call it is a third line of defense oft he shingles are installed over the flange. The way you have it currently, the "glue" as you call it is the only line of defense. The glue you are speaking of should have been a roof cement, Black Jack has always been the brand I would recommend.

  • 3 years ago

    Ok thanks. Honestly I think I’m gonna have the new company take it out and patch it.

  • 3 years ago

    Did your attic have condensation problems prior to this vent installation? Does the roof have a ridge vent? If not then that is the best way to to vent the roof so it is not noticeable when looking up at the roof. Does the roof have an soffit or gable vents? The roof needs an adequate amount of air intake. Just adding an exhaust vent does nothing if air cannot enter the roof. You will still have condensation problems.

  • 3 years ago

    " Does the roof have a ridge vent? "


    Looks like there is a shingle over ridge vent from the pic the OP posted @mike_home.

  • 3 years ago

    Thanks…so this crawl space is basically sectioned off and dedicated to the ac unit. I do know there are gable vents on either side of the house but that’s another side of the roof and attic and therefore not helping the airflow in this crawl space. We do get some condensation on super hot days and we have wrapped the pipes, but we are very mold cautious and want to make sure there is airflow and temp is controlled..basically going above and beyond.

    Originally we wanted a dehumidifier, but the air is generally stale in that space anyways (plus not much room for a proper dehumidifier) so this temp controlled vent was recommended.

    And now here we are!

  • 3 years ago

    Are there soffit vents? As noted by mike_home, there needs to be a place for a roof vent to draw the air from to suck the moisture out.

  • 3 years ago

    I’m really not sure. But you’re confirming that our service company hastily made this recommendation without full thought. I’m going to reverse the whole thing for now, take out the vent, patch up the hole, and figure out air circulation later.

  • 3 years ago

    Looking at the photo there may be a ridge vent but it is hard to say for sure. If you have any cold surfaces in the attic, condensation will form whenever warm moist air comes in contact with it. Adding a roof vent will not prevent this condensation. Wrapping all the exposed surfaces is the best way to stop the condensation in my opinion.

    You do want good air flow to stop the condensation that occurs during the winter. The vent you have added will help that problem, but only if you have adequate air intake. The ventilation also helps allow the hot air to escape in the summer.

  • 3 years ago

    Here’s a pic of exterior and side. The side there has a window, and there is a gable vent above it, but the crawl space is sectioned off so I don’t think the gable vent does anything for this interior space.

  • 3 years ago
    last modified: 3 years ago

    Have the proper roofer, check to make sure you have air coming into your attic space, and see if you need more venting on the sides. Others above. are right, when telling you, that you just cant have a vent if you are not drawing fresh air in from soffit vents, or other. Are you even sure you needed a vent? Has there been any evidence of mold or mildew in that area? I am gathering you have Hvac equipment in your attic? I am not familiar with Hvac in the attic. That is never done here. Hvac, is always outside the house on a cement slab. The only thing in the attic would be

    duct work, if you had ceiling vents. Most here have crawl spaces and have duct work under the house, and wall vents.

  • 3 years ago

    Yes, they are all correct in that the service company didn’t vet this enough whatsoever. We had condensation from our AC unit that sits in this crawl space. In one case it literally dropped onto the wood from a pipe. We wrapped the pipe, but even so, there was condensation that would almost poop on the pipe itself in the crease of the pipe. So, we realized we needed to control the temp and moisture. The service company said the vent would help control the temp, and therefore moisture. They messed up, is the moral of the story. So we are all set to remove the vent, patch the roof, and figure out something else. At least weather is cooling now so we won’t have as much of an issue since we won’t have AC on in the fall.

  • 3 years ago

    Pool* on the pipe, not poop, but we are basically in a sh*t situation so poop works too lol

  • 3 years ago

    Also, we did a mold air test in the crawl space which was clear, but there’s lots of dust in there in general so we have a mold company coming next week to just do a Hepa vacuum clean out of the space regardless.

  • PRO
    3 years ago
    last modified: 3 years ago

    Just a suggestion.

    Crawl space refers to the space between the ground and a floor structure above.

    Attic refers to the space above a ceiling and below the roof that's not living area.

  • 3 years ago

    Ok, well it’s the attic, but it’s the space behind a wall and under the roof that is unused other than being the space for our ac unit. Our attic runs the width of the house so it’s spacious, but this “attic crawl space” is a tight squeeze as they (previous owners) sectioned off only the space necessary to fit an ac unit and connected ductwork.

  • PRO
    3 years ago
    1. You'll need to ensure adequate air flow through all attic spaces to prevent accumulation of moisture and attendant issues. A mushroom type vent is a poor choice, in my opinion, particularly in areas subject to snow accumulation on roofs. As mike_home noted, eliminating the issue of condensation on your air handler will require better insulation of the unit and associated ductwork. It may also require better air sealing of joints to prevent leakage of conditioned air into the attic. All joints should be sealed with mastic or UL-approved tape designed for that purpose.
  • 3 years ago

    If the space contains HVAC equipment rather than venting it and exposing your HVAC and ducting to the outdoor ambient temperature and humidity, with the associated losses, I'd seal the space with spray foam and incorporated it into the conditioned building envelope. The logic of putting HVAC ducts and equipent outside the conditioned envelope completely escapes me.

  • 3 years ago

    I agree, knowing what I know now and if I were the previous owners I would’ve done it very differently. I am now sure how we will address it long term but we will get a better company to help us think it through next time and not recommend what turned out to be a disaster. Ugh.

  • 3 years ago

    Looks like you have a roof vent but I don't see any soffit vents. Ask the second roofing company about this when they come by.

  • 3 years ago

    I looked up what a soffit vent is and I do think we have them, at least in some areas of the house (need to do a visual, I’m not home at the moment). Since we had that leak and wanted to dry it out, we had the vent fan run for a bit yesterday (thought we should get some use out of it before they remove it Monday), but I noticed that it seemed to create a bad odor in the attic after it had been on for maybe 2 hours. It wasn’t overpowering but definitely not a great smell. Again, this was all a mistake, but curious is anyone knows why it would be basically pulling up a not great odor when running…

  • 3 years ago

    The leak may have started mold.

  • 3 years ago

    Thankfully it didn’t, we caught it right when it started leaking (it had literally just been installed the day prior). I had a feeling it wasn’t installed right so when it started to storm I went up right away to watch it and sure enough, I was right. So thankfully we avoided a catastrophe and put a bucket under. I feel like the odor could be from the carpeted area on the rest of the attic space which used to have a “new carpet” type of smell. It was more like that than a mold smell, so I wonder if the van was just sucking up all the carpet VOCs…