Curious if anyone has tried this product or wants to comment on it just based on the website.
http://www.dciproducts.com/html/smartvent.htm
I am looking for a way to get some venting near the eaves on a house that has no soffets. Roof ends right at wall. All suggestions welcome.
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I used to sell the stuff to Home Depot's At home Services, their installed sales division. They used it and were prepared to offer the full GAF warranty on the roof and a Home Depot lifetime warranty. We all looked at it and said, "Oh, premade beehives". On the other hand, it looks like the best solution to a tough problem. It's not cheap, but much more readily available than vented drip edge or ventaflash. I don't know how long that membrane will hold up, but DCI says they've used it for years in New England without problems (the idea of ice dams came up in the office too). I don't know if this little ramble helped, but... You might also look at coravent strip vents. They might work for your application.
I'm looking at this...
http://permachoice.com/
I have high hopes......
Look at the diagrams with the open inner wire mesh and the rising blue arrows. The air will not go where you want it to just be cause you diagram it to go there!! With strong wind, I can see air moving through the ends of batts (wind washing), lessening the R value just as in open soffit vents. This has been seen with infrared gear and is now considered matter of fact unless you install air tight wind deflecting baffles at the ends of the batts. This has been an R2000 requirement since 1983-4.
any ridge to eave venting system depends on natural convection...pop in vents in an overhang, drip edge vents, vented fascia....and all require some kind of blocking to maintain the air path from the eave to the ridge...SOP being those propavent things...way back when, we always put bird blocking on the top plate between the rafters, which worked well with the R-value/depth of the FG used then, but I don't see it done much anymore,,,,
there was a thread here recently detailing band board & secondary plate, roof members on top of that, and that would be ideal combined with a fascia vent (although I would use Coravent strips and solid fascia, not the product referenced in this thread)
of course, everyone seems to need a cathedral ceiling in at least one room, and really, IMHO, if you have a need for grand spaces, then you should have enough cash to pony up for a either a foamed in roof, or SIP panel one....