Flash vent is basically half of a shingle over vent. IOW, if you cut a S/O vent down through the middle on the long axis, the tall side goes up against the wall and the shorter side extends over the new roof. You simply cut a groove in the sheeting under the vent, just like you would up at the ridge.

You need to pay particular attention to flashing this type of vent arrangement though. Whenever we've done this, we both flash and counter flash it.

 

New to me also.... I'm a GC not a roof pro.... any chance of a pic or drawing...

TIA

 

New to me also.... I'm a GC not a roof pro.... any chance of a pic or drawing...

TIA

Ask and ye shall receive.... Now, granted, this is a quick mock up I just did in MS Paint, but you can get the idea....

EDIT: Here is a shingle over vent drawing. Imagine the flash vent cut in half on the long axis right down the middle.... (again, apologies, it's MS Paint)....

 

If this is what you have in mind, Click Here

 

Greg nailed it.... AirVent has one ready made that includes some built in flashing. You don't shingle over this one (Flash Filter Vent)....

http://airvent.com/homeowner/products/ridgeVents-specialtyFilter.shtml

Or, you can make your own out of regular shingle over vent like I describe which does have shingles over the top of it.

 

There are both "shingle over" and just metal types, google " head wall roof vent".

 

I did a Google.... "Roof to wall vents"

And voile: https://www.google.com/#fp=927651d2b2410d8f&q=roof+to+wall+vent

This is the product I'd use. I've got COMPLETE confidence in Lomanco.

 

Dang.... how do you get the YouTube video to "appear" in the post rather than just the link?

 

Just use this part out of the link-> [YOUTUBE uNCgWgQM-B0[/YOUTUBE] :thumbsup:

 

This is a great candidate for a ventless attic with spray foam insulation rated for this use.

 

Excellent info guys. Thanks a lot.