A few questions about ridge vents

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I have a couple roofing companies coming out next week to give estimates on ridge vents for the house and a second garage (stand alone).
What are some questions and concerns that I should address to them. I have thought that perhaps there might be varying quality among manufactures, but that is about all I can think of.
Any advice will be appreciated.
Bob-tx
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wrote:

Bonded, insured, licensed, guarantee, how many ridge vents have been installed, experience, payment when job is completed. Usually, the well-established companies that have been doing business 10+ years will use better materials or offer to use better materials. My ridge vent is 20 years old, no problems at all.
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Ditto...The only thing I'd add is ask around to see who did others in the neighborhood or town...Friends , family , ect....Ask for references and check them...Ask if they use Illegals and avoid those that do...Good luck...
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How do they attach it to the roof? Nails or screws? The ones that were nailed down here in Florida came off the roofs easily during the hurricanes. Do you have enough openings in the soffit to allow for good air flow?
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Do you have enough openings in the soffit to allow for

This is a very good question to get answered. My neighbor had them installed and the roof knew they would be useless with the cathedral ceilings but did not advise him. I think they chared him about $1200 USD and they are pretty much worthless.
Jimmie
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A fan would have been cheaper and far more effective!!!!

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On a cathedral ceiling, ridge vent is about the only way you can go. There should be an air gap between sheathing & insulation. Or, baffles so the insulation isn't against the sheathing. The baffles create the air gap.
You can't put pod/pot vents on and be effective, nor can you install gable end vents for the same reason.
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Thats true and you would have thought the house would have been built that way with the baffles and ridge vents installed but it wasnt. My point is that it was a waste of time and MONEY to install the ridge vents without correcting the other airflow problems. The installer didnt let the home owner know about the other problem, the installer was either totaly incompetent or he just wanted to make some quick and easy money. Im sure if the owner had been properly advised he would have save his money and got all the work done when the roof needed to be replaced
I lucked up and my house got hit by a tornado. It was built by the same people that built my neighbors and had the same problem. My roofing contractor spotted the problem and I was able to fix mine, thanks to the damage cause by the tornado, for the cost of the deductable.
Jimmie
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.
How is a roofer supposed to figure out the airflow problems inside an already built cathedral roof? I guess if there were no soffit vents or inadequate ones, that would be readily visible. But if there were no baffle chutes installed, insualtion is blocking flow somewhere along the way, etc, it's not clear to me how you can figure that out.

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Ideally there should be more intake space than exhaust, and if the intakes are covered with window-type screens, then that could reduce the "net free area" by as much as 40%.
If the house has or will have soffit vents, they will need to install rafter baffles as well, so the ceiling/attic insulation can go all the way to the roof, yet still leave room for air to get from the soffit vents to the ridge vent.
Also ask about rain infiltration. Some are rated for Miami-Dade county (FL) hurricane standards, I believe the "air-vent II" is what I have (don't remember the mfgr), and I think it's one of those that has 0% infiltration; i.e. the attic remains totally dry inside even though the roof is about to be ripped off....
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I had a new roof put on in 2007. I got estimates from three different companies....all three companies said they would use the Cobra ridge vent. I ended up hiring a company that used GAF shingles and the Cobra ... they also worked with the My Safe Florida Home Program and everything was done according to Miami-Dade Code (though I am in another FL county) ... the building inspectors are pretty careful to make sure everything installed is done in accordance with the new codes put in effect after Andrew. My roof is a cathedral ceiling type. We have soffit vents . All I can tell you is that it doesn't leak and the electric bill has remained about the same as it was with the tile roof. We did not install any more insulation.
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snipped-for-privacy@gate.net wrote in

Not only a good Q but a critical one!
If you want to be sure you need to do some legwork and research so you can talk to them with ammo. You need to calculate your roof area and existing vent opening space. Read this.
    http://www.gaf.com/Content/Documents/20402.pdf
Then go the GAF/Cobra site for additional info.
    http://www.gaf.com/Content/GAF/RES1/ROOF/CobraRigidVent2.asp?viewer=&module Then when you talk to roofer you can ask if it includes upping (if necessary) the vents. If not, you have yourself a roofer who would have done an inadequate install had you not got educated. OK, you may catch him and he'll up the bill for additional venting but what else are they messing up on that you don't know about?
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You EXPECT the roofers to put soffit and gable vents in ??? I suppose you expect them to repaint everything as well....And I guess if it's a cathedral you expect them to put staging up inside remove the drywall , remove insulation install rafter vent if it's missing and make sure there is enough circulation , put the insulation back up ,put new drywall back up , tape and repaint as well....You don't have a clue...Roofers do ROOFING....If you feel there are more problems call a General Contractor to check things out first and correct any other problems...GESH , it's you that need an education...LOL....If you call a roofer to put in ridge vent , that's what they will do..They aren't responsible for the original builders mistakes or installing gable and soffit vents or checking the cathedral...They might recommend you get the soffit or gable vents installed but it is NOT their job...
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Some roofers will actually do it (they do have saws you know) and some won't. Depends on where you are. Ridiculous in one area is BAU in another. Your basing your comment on limited exposure. GESH , it's you that need an education...LOL....
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wrote:

roof won't last and he's on the hook for repairs.
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You are very WRONG..A GOOD roofer will tell you you need more vents and maybe not do the roof untill you get them unless you give them the OK , but I would not want a roofer to be removing siding and cutting holes in my house , replacing siding and repainting or poking holes in my cathedral ceiling to check for Raft- R -Mate and repairing the drywall and repainting nor is it their responsiblity...If they did all that they would be more than just "roofers"....They would be General Contractors...Atleast here in New England..How would the roofer be responsible for the builder not putting in Raft-R-Mate to allow airflow between the insulation and the roof ??? How is he supposed to know this ?? I suppose the roofer is responsible for making sure the right amount of insulation is installed in the attic to prevent ice dams as well or he is on the hook...The roofer is responsible for making sure the underlayment is good and installing the proper amount of ice and watershield , felt paper , shingles and the ridge vent if it is requested...Nothing more...Maybe in your nick of the woods roofers do everything but I hardly think it's the norm....The SHINGLES may be warranteed for 30 years but the installation warrantee is typically a year....I suppose in 10 years when your underlayment is rotting out from no vents or insuffecient insulation you think the roofer is still on the hook???LOL...You do need an education...LOL...
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OK, if you say so. You can teach a dummy things but you can't teach a know-it-all nothin'.
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Great come back...I guess I'm supposed to say , I know you are but what am I now , right???LOL...If your so smart show me where I'm wrong...I'm not afraid to say "I stand corrected" and have done so MANY times..LOL...It seems you are....
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Thread has become useless. Nobody gives a rats-ass what you or I believe about who does or does not install the vents. All they care about is the particulars as it applies to them locally. The only way they will know that is when they make contacts locally. The important thing to know is it needs to be checked.

Do you have a hot key for this or something???
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Your the one who keeps responding albiet with personal attacks other than trying to "teach me something" as you put it..LOL...Nothing usefull to add , move along....LOL...
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