Replies

1. 
   gdavis62 | Jan 25, 2004 11:43pm | #1

   Cor-A-Vent has a big broad product line, including applications for metal roofing.

2. 
   argyle | Jan 26, 2004 12:59am | #2

   Using 3 tab asphalt shingles.  Have literature on Lamonco, Cor-a-vent X-5, Cor-a-vent V300, Cobra, & Tamko.  Not interested in the mesh types.  Leaning towards the Cor-a-vent V300 or the Cor-a-vent X-5 but is the X-5 going overboard for St. Louis. 

3. 
   MojoMan | Jan 26, 2004 01:16am | #3

   I'm not unbiased, but I've used "Shingle Vent II" because I once read that the baffle it has deflects wind upward, creating a better draft and keeping water out. I have a sneaking suspicion that they all work about the same and energy is best spent making sure the eave and ridge vents are balanced and the air has a clear pathway to move between them.

   Al Mollitor, Sharon MA

1. 
   dIrishInMe | Jan 26, 2004 02:25am | #4

   IMO ShingleVent II is the best for asphalt 3 tab roofs.  I've tried a few other ones and for various reasons I came back to SVII.  I think there are now other manufacturers' that are making a similar product, but why buy an imitation when you can have the real thing.  The SVII product has changed a bit for the better over the years.  A few of the features is both long edge and end baffles to keep wind driven rain/show out, and a inside mesh - similar to fiberglass furnace filter material to keep the bugs out.   

   BTW - even though the ridge ventilation slot cut in the roof ridge does not extend all the way to the end of the ridge, I think it looks better to go ahead and run the ridge vent to the end.  It may be a bit more weather proof that way too.  Matt

4. 
   roofdoc | Jan 26, 2004 02:29am | #5

   in response to you for a ridge vent system for metal ribbed roofing try http://www.profilevent.com as to what is the best for a shingle roof you will see that most manufactors have a plastic style ridge vent  that is pretty much fool proof to install and when you think about the fact that the pieces are three foot long it means lees laps for leakage

1. 
   hasbeen | Feb 29, 2004 05:59am | #8

   Thanks for the suggestion.  After a fair amount of research I ordered profile vent yesterday.  Found out that Metal Sales recommends and supplies Profile Vent to go with ProPanel II - at least in Colorado.Something is what it does.

5. 
   xMikeSmith | Jan 26, 2004 03:15am | #6

   sorry.. i'm  way biased... i've been using ridge vents since about 1980..

    we started using Ridge Vent by Air vent..

    they did a lot of research. and published it.. when a  lot of the codes started requiring attic venting.. some of the johnny-come-latelys got  on board and mostly started selling on the basis of EASE of INSTALLATION..

   when the industry changed from the old aluminum chicken feeders to the modern shingle over style.. even more mfr's got into the act.. but still more research and experience proved to me that all ridge vents need a baffle or they are prone to backdraft   and leaking.. and they don't draw the way they should..

    Air-Vent continued wind tunnel testing and smoke testing and continued publishing their results..

   they made a believer out of me.. the only shingle vent we'll  spec or use is Shingle Vent II.. by AirVent

   Mike Smith   Rhode Island : Design / Build / Repair / Restore

6. 
   kestrel | Jan 26, 2004 03:18am | #7

   Before we picked the vent to use, I checked on the web and found a report from the University of Illinois that rated ShingleVent¯ II the best.  I just looked in google and found reference to that report, but couldn't find the report itself still online.  I'm attaching a copy of what I saved from it as a Word file.

   We used ShingleVent II.   It has now been on over 6 months and there has been no sign of any water leakage.

   kestrel