I am living in Knoxville, TN. My house roof was damaged by hailstorm. The house was built in 2007. The attic was vented by soffit for air intake and three power vents for air exhaust before damage. My contractor suggested us to replace the power vent by ridge vent. Therefore, the power vent was removed and the new ridge vent was put in. After that, the attic became much hotter. We realize something is not right. It turns out that our roof is a hipped roof. The total area of the attic is 2100sq feet. Using the GAF cobra ridge vent, the minimum lenth of ridge vent shoubld be around 28 feet. But our roof only has a maximum of 22.5feet ridge length. I want to ask if anybody has encounted this problem and what solution can be used?
The important question here is whether you are a holocaust survivor or posting from the penitentiary…
Normally, I’d say to stick with the power vent. We recently had a customer with the problem described that wanted Cor-A-Vent hip vent. I was and still am somewhat skeptical but he was insistent so I agreed we would install it but would make no guarantees to how effective it would be.
We cut in the hips about 1/3 of the way down from the top and went ahead and installed the vent the full length of the hip for cosmetic reasons. This was on a 2 story simple hip with one gable coming off the front. This was done just a couple of weeks ago and I haven’t been back to that location to see how it is working.
You may ask why I was skeptical about the hip vent. The vast majority of material I’ve read from the so called venting experts highly recommends having the roof ventilation be at the highest point of the roof and at one level. The hip vent obviously violates this rule.
Were I in your situation, perhaps you could install the hip vent 5 to 10 feet down each hip. Do it to evaluate, therefore, don’t shingle over it and don’t put the blanks in until you see that it will work. If it does, then do the rest of it. If it doesn’t, it will be relatively cheap to take it out, make the repairs then replace everything with a power vent.
Your contractor has read all the hype, but has never ventured to understand the science. In other words, boy can he really nail shingles!!!
I saw one job by a “GAF Gold Star Certified hottest greatest thing to ever install roofs/ windows/ siding and hire illegals and shady subs EVER.com” …that had about 3 ft. of ridge vent installed on what I would guess was at least a 15 sq hip roof. About a 7/12 so the Cubic feet was rather immense
Ridge vent defies science to “work”. Hot air rises. A ridge vent must dissipate heat by air going down. The fastest way to be sure to get a different contractor than me is to insist on a ridge vent. Turbines are in inexpensive way to pull heat from your attic, and they do not blow motors, like power vents - which are more effective until they blow out without you knowing it.
If you can do an inexpensive repair, I would reinstall turbines. I’d abandon that ridge vent idea. You can always call the guy who recommended it. I’d love to hear what he says.
[quote=“Authentic_Dad”]Normally, I’d say to stick with the power vent. We recently had a customer with the problem described that wanted Cor-A-Vent hip vent. I was and still am somewhat skeptical but he was insistent so I agreed we would install it but would make no guarantees to how effective it would be.
We cut in the hips about 1/3 of the way down from the top and went ahead and installed the vent the full length of the hip for cosmetic reasons. This was on a 2 story simple hip with one gable coming off the front. This was done just a couple of weeks ago and I haven’t been back to that location to see how it is working.
You may ask why I was skeptical about the hip vent. The vast majority of material I’ve read from the so called venting experts highly recommends having the roof ventilation be at the highest point of the roof and at one level. The hip vent obviously violates this rule.
Were I in your situation, perhaps you could install the hip vent 5 to 10 feet down each hip. Do it to evaluate, therefore, don’t shingle over it and don’t put the blanks in until you see that it will work. If it does, then do the rest of it. If it doesn’t, it will be relatively cheap to take it out, make the repairs then replace everything with a power vent.[/quote]
I think wind blown rain would leak in the house down the hips. I think I have seen that done one time.
[quote=“Gary”]
[quote=“Authentic_Dad”]Normally, I’d say to stick with the power vent. We recently had a customer with the problem described that wanted Cor-A-Vent hip vent. I was and still am somewhat skeptical but he was insistent so I agreed we would install it but would make no guarantees to how effective it would be.
We cut in the hips about 1/3 of the way down from the top and went ahead and installed the vent the full length of the hip for cosmetic reasons. This was on a 2 story simple hip with one gable coming off the front. This was done just a couple of weeks ago and I haven’t been back to that location to see how it is working.
You may ask why I was skeptical about the hip vent. The vast majority of material I’ve read from the so called venting experts highly recommends having the roof ventilation be at the highest point of the roof and at one level. The hip vent obviously violates this rule.
Were I in your situation, perhaps you could install the hip vent 5 to 10 feet down each hip. Do it to evaluate, therefore, don’t shingle over it and don’t put the blanks in until you see that it will work. If it does, then do the rest of it. If it doesn’t, it will be relatively cheap to take it out, make the repairs then replace everything with a power vent.[/quote]
I think wind blown rain would leak in the house down the hips. I think I have seen that done one time.[/quote]
If installed correctly, I don’t believe there is much chance of wind blown rain entering through the hip vent. Go check out the product on the Cor-A-Vent web site, it is well made. My issue is purely with whether or not the ventilation at a lower level will work.
I’m surprised, even shocked, about your comments towards Turbines. Obviously, beauty is in the eyes of the beholder. I think those things are the biggest waste of space on a roof ever invented. LOL Do you really install those things in MN?