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-   -   best ridge vent for cathedral cielings (http://www.diychatroom.com/f9/best-ridge-vent-cathedral-cielings-160538/)

gwilkrrs 10-19-2012 07:16 AM

best ridge vent for cathedral cielings
 
recent addition is cathedral ceiling 5/12 pitch. it is a 20 x 40 that has a "T" shaped roof where 1 ridge ties into the other one in the middle. what is the best ridge vent to use with this senario- is a cobra roll vent ok? there will be vented soffitts.... thanks.

joecaption 10-19-2012 07:48 AM

Personaly I'd pass on using any of the roll vents. Use one like this instead.
http://roofing.owenscorning.com/home...protector.aspx

My local shingle distributors have stopped even carrying them because of all the complents.

How wide a rafter are you using? A ridge vent and soffits are usless unless you have room for baffles and still have room left for the proper insulation.

gwilkrrs 10-23-2012 06:47 AM

thanks. 2"x12" rafters with insulation at the bottom-ceiling side- leaving 1" of open space to the roof side for air flow.

shazapple 10-23-2012 06:51 AM

Joe is right, the roll style vents depend a lot on the installer. If they overdrive the nails you lose a good portion of your ventilation.

bcdemon 10-23-2012 08:01 AM

Cobra Vent (AKA Roll of S.O.S Pad) is useless IMO. Although it's "bird friendly" as I see them using it for nesting all the time lol. The one Joecaption offered is a better option. I use Lomanco OmniRoll vent, very similar to the one joecaption posted above.

gwilkrrs 10-23-2012 11:21 AM

thanks. i will be the installer. i used the cobra vent roll when i re roofed my house 6 years ago. it was easy to work with but seems rather basic.....

i want to put in a functioning vent to avoid any problems- when i did the house i created a draft inside..... the house is a 1952 cape cod that had 2 small gable vents solid soffit with 0 vent and no ridge vent and minimal insulation. i installed blown in insulation, vented soffit and a ridge vent. during the first winter after this work you could feel a draft inside that wasnt present before.... still debating on blocking the gable vents off to see if this helps, i made sure the insulation wasnt blocking the eaves...

bcdemon 10-24-2012 07:37 AM

If you have soffit intake and ridge vent, I would close off the gable vents, just counterproductive to the venting system.

And if you felt a draft in your house once you vented your roof, I would say the seal between your living space and your attic is leaking big time.

gwilkrrs 10-26-2012 07:05 AM

thanks! yes the seal is bad somewhere. it is ballon framed with no wall insulation. i blew down into the open stud bays from the attic the best i could but.............


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