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Old 02-05-2009, 07:52 AM   #1
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plumbing vent flashing on metal roof???


Hello,

I'm planning on installing some standing seam metal roofing on a 2:12 pitch roof. The problem is, I'm going to have one plumbing vent penetration in the roof, and I'm not real sure what type of boot/flashing is used on metal roofs....

I have found some boots that screw down directly on the roofing surface. From the looks of it, the bracket of the boot squeezes a rubber gasket and holds it tight to the surface of the roof to seal it off. Is that the correct flasing method? I'd hate to have a leaky roof!

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Old 02-05-2009, 07:04 PM   #2
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plumbing vent flashing on metal roof???


http://rcs.si-sv2628.com/show_album_...&file=4434&s=0

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Old 02-05-2009, 10:11 PM   #3
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Frank whats that curlyque thing in the chimney?
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Old 02-06-2009, 08:12 PM   #4
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This pic? [img width=600 /]http://www.rooferscoffeeshop.com/images/photo_albums/30/598/Untitled-5.jpg[/img]

It's a shutter ho;d back. The house in early 1800. Dang roof was flush with the windows.

Anywhere in my albums like that, you can just click on 'Get Url' to post and ask questions, or just post the pic if you want.

Here is a link to 100 of my albums elsewhere on the web. I need to incorporate some into my websites. http://rcs.si-sv2628.com/photo_album_list.asp?u=30

I have the good, the bad, and the ugly there.
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Old 02-07-2009, 12:02 AM   #5
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thanks pal i added that link to my favorites
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Old 02-07-2009, 08:31 AM   #6
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plumbing vent flashing on metal roof???


http://www.itwbuildex.com/dektite.htm

Best pipe boot I've found for SS roofs. Accept no substitutes.
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Old 02-07-2009, 08:52 AM   #7
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I wouldn't recommend installing a metal roof on 2/12. If you're worried about the boot for your flashing leaking, why aren't you worried about every seam leaking? I hope you don't get ice or snow.

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Old 02-07-2009, 09:28 AM   #8
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plumbing vent flashing on metal roof???


Quote:
Originally Posted by jaros bros. View Post
I wouldn't recommend installing a metal roof on 2/12. If you're worried about the boot for your flashing leaking, why aren't you worried about every seam leaking? I hope you don't get ice or snow.

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Depends on the system
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Old 02-07-2009, 09:54 AM   #9
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plumbing vent flashing on metal roof???


some standing seam systems are rated for a 2/12 but id be worried about any penetrations or valleys like on your project.From the pic ive seen your really not going to see much of the roof in back id seriously consider maybe some of the single ply systems.Not easy to fix a leak in a ss system good luck
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Old 02-07-2009, 12:17 PM   #10
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There are some SSMRS that can be used on roofs that are as low 1/4:12 pitch. But the ribs are at least over 2" and they are mechanically seamed with concealed clips that are two piece to allow for expansion.
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Old 02-07-2009, 04:45 PM   #11
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those types of roofs are more a commercial product way over scale for a small residential job it would look out of place
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Old 02-07-2009, 06:29 PM   #12
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Quote:
Originally Posted by strublesiding@optonline.n View Post
those types of roofs are more a commercial product way over scale for a small residential job it would look out of place
Not necessarily, on shallow pitches, in many cases, you can't really see the roof. And in many other cases (certain neighborhoods) a metal roof would look out of place anyway.
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Old 02-07-2009, 08:18 PM   #13
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plumbing vent flashing on metal roof???


I've seen ice and buildup rip sheets and flashing right off of standing seam on low pitch roofs. As long as the OP isn't in a cold weather area it would probably be okay.
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Old 02-09-2009, 11:34 AM   #14
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plumbing vent flashing on metal roof???


thanks for all the replies...

i wasn't aware of the potential problems with SS roofing....the spec sheet for the system i was looking at said it was good for 2:12 pitch. i'll contact the manufacturer and explain my roof to see what is recommended. i live in Michigan, so there will definitely be snow and ice.

for what it's worth, here are a couple pics of the roof:










the roof is pretty hard to see because of the low slope. you can only see a tiny portion of the roof while standing in our yard. our next door neighbors will be able to see it for sure.

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Old 02-09-2009, 11:40 AM   #15
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plumbing vent flashing on metal roof???


oh yeah, forgot to mention some more specifics:

the front of the roof is 8:12 pitch with architectural shingles. not planning on replacing this.

the roof won't be vented...i'm going to have closed cell foam sprayed to entire roof deck from below. R50 insulation.

the entire new roof is covered in Grace water & ice shield. I'm going to take a couple of courses of shingles off the top of the old roof and lap a piece of Grace over the main ridge.

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