Vent Cap location on Standing Seam roof panel

Guest User
3/11/2014
Hello Experts, I am hopeful you can advise me. I have a Standing Seam Metal roof with one Vent Cap (from Kitchen Range Hood) on a panel (~26 feet long) almost at a midway point between Ridge and Eves. Over past few years, the snow/ice has badly damaged this cap. One time, the panel and the cap slid down that I had to get re-attach in the middle of winter. The original installer did not put any snow guard behind the cap it and the bottom part of the panel (down from the vent cap) was not screwed on the deck either. hence this slide. So obviously, the panel is damaged as well. I would like to correct this situation. I need new panel and new cap. From all I read, if I never want to have this problem, I should get the cap installed near the ridge (I have one bath room vent near the ridge and have no problem what so ever)? Or what would you advise? I rather have all snow come down (this is back yard) than have snow guard holding it on the roof. Other question on the Vent Cap it self. Should I use Broan 634 vent cap (rectangle, available at Lowes) OR 6" roof Jack (available at Home Depot)? I would be very grateful for your advise on this.
Todd Miller
Classic Products, Inc.
3/12/2014
Are you surface mounting with screws going through the roofing and into the decking and still experiencing these problems?
Guest User
3/12/2014
Hi Todd, Unfortunately, Yes.
Todd Miller
Classic Products, Inc.
3/15/2014
Wow. I'm unfortunately not sure I have any specific advice on this. Perhaps someone else will. I would suggest some snow guards uphill of the protrusions and I would work to secure the protrusions as tightly as possible, and use as strong of vents as you can find.
Guest User
3/15/2014
Thanks, Todd. I will also wait for advice from others. Kind Regards,
Info @windowsonwashington.net
An informed customer is our best customer.
3/15/2014
Can you vent it through the gable end and just get rid of the roof vent? If not, perhaps some snow guards above or a wedge to push the snow around the vent?
Guest User
3/20/2014
Hi Eric, sorry for the late reply. Thanks very much for your suggestion. It is possible to vent through gable vent on the side of my house but that will take 3-4 turns and total ~20 feet of duct. So the efficiency will go way down. What do you think about putting a snow diverter behind the Roof Cap that is at least 2-3 inches taller than the height of the roof cap? Something like the picture attached from link (http://www.roofthings.com/pipe-diverter.html#). Obviously, I have to change the size to width = less than 14.5" (width of my panel) and Height + 10" (the Roof Cap is 8" tall). Would one of these be enough? The distance between the Roof Cap and ridge vent is ~10 feet. Thank you all very much for your self-less kind help. Regards,
Info @windowsonwashington.net
An informed customer is our best customer.
3/21/2014
Seems like that would work.
Guest User
3/21/2014
Thanks very much Eric.
Info @windowsonwashington.net
An informed customer is our best customer.
3/21/2014
FYI..don't put that many holes in the roof or brace it from the inside. A good sealant should hold it down well.
Guest User
4/5/2014
Two more follow-up question, please. How far behind the vent cap I should install the Snow Diverter? I am thinking may be 2 inches behind? The panel piece behind the vent cap is ~10 feet. Which sealant (Brand/name) would you recommend to attach the Snow Diverter to the roof panel? Thanks much in advance.

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