Avery Pierce
1/16/2008
Thanks for any advice or info.I had a new standing seam roof installed on my newly built house.The entire roof is cathedral.No attic.I paid for a vented ridge also.When I was wiring the house I was in the ridge area and noticed felt paper still covering the air gap in some places.I also noticed some panels are extending over the air gap.So needless to say I kept looking.I got on the roof and saw how they vented.They cut about half an inch off each end of the z-channel and snapped the ridge cap to it.This appears to be the cheap way to vent.I thought I should have received a manufactured vent ridge designed for standing seam metal.People have told me to contact the manufacturer of the metal but the roofer will not tell me where he buys his rolls.All I know is he buys his metal on rolls and runs it through his machines to form the panels.The color is Hartford Green if this helps narrows down a manufacturer.I recently found out his own crew did not do my roof but he subbed it out.So my questions are has anyone heard of venting the ridge this way and how do I determine the proper air flow I need for my house because I have a strange feeling the roofers didnt?The floor footage on the second floor is 1500 square feet and the height from floor to ceiling is 13 feet.The front roof pitch is 11/12 and the back roof pitch is 5/12.Once again thanks for any advice.
Brian Selig
Architectural Building Components Metal Roof and Wall Panels
1/18/2008
With a gap present at the ridge, I am aware of two ways to handle this: 1) Perforated zee closures with the panels cut short to expose the gap. (Attached) 2) Securing Cor-A-Vent or similar product over the gap and onto the panels. In each instance, a sheet metal ridge cap (different styles) would be installed over the top.
Nate Libbey
1/19/2008
First of all, as far as I am aware, when you have a cathedral ceiling with no attic, its a bad idea to vent through the ridge. If you do vent a standing seam roof, Brian's methods work well. Also there is a product called Profile Vent that works well. Depending on the type of standing seam system used, another method uses a perforated vent drip. I've attached a drawing to show how it works.
Todd Miller
Isaiah Industries, Inc.
2/6/2008
Avery, let us know if you are still seeking assistance.
Todd Miller
Isaiah Industries, Inc.
7/16/2011
In my opinion ridge vent will be your best option. You may also want to add some supplementary powered fans that will come on when the temperature hits a certain level.
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