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paulz
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# Posted: 5 Oct 2018 10:58pm
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This link shows the drip edge on the gable end nailed over the roll roofing, is that correct?
http://thefavorite.info/rolled-roofing-installation/rolled-roofing-installation-roll- roofing-installation-rolled-roofing-installation-earth-rise/
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Absolutely
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# Posted: 6 Oct 2018 11:49am - Edited by: Absolutely
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Yes it it's underlayment that you're talking about. At the eave, I'd guess that if you install the flashing under the roll roofing you'd risk getting moisture between the flashing and the roll roofing.
"Metal D flashing, or drip-edge, is sometimes installed only along the eaves edge, but it is actually required by the 2012 International Residential Code (IRC) “at eaves and gables of shingle roofs.†At “gables,†of course, means along rake edges. The purpose here is to help prevent wind-blown rain and capillary action from directing rainwater and snow melt underneath the underlayment and shingles."
from here: https://www.jlconline.com/how-to/roofing/common-roofing-errors_o
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NorthRick
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# Posted: 6 Oct 2018 11:56am
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On a shingled roof, I've always installed it under the shingles on the gable ends. But with the rolled roofing, my guess is they want it on top to prevent wind from getting under and lifting the rolled roofing.
If it were me, I'd install it like they show with a generous bead of caulk laid down on that edge before setting and nailing down the drip edge.
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ICC
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# Posted: 6 Oct 2018 12:07pm
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In the link the first image shown (with the drip edges) is for underlayment, not roll roofing. Gorilla Giard is an underlayment, roofing felt, also known as tar paper. Yes, in that case, the rake (gable edge0 has the drip edge applied over the underlayment. The eve has the drip edge under the underlayment.
With roll roofing, you can find installations that use underlayment and those that do not. I would do whatever the manufacturer of the roll roofing recommends.
I have seen roll roofing with the rake having the drip edge over the roofing and nailed and tarred and I have seen the drip under with the edge of the roll roofing extending over just as would be done with shingles.
I've actually never used roll roofing. Even my chicken coops usually had metal.
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rockies
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# Posted: 6 Oct 2018 06:00pm
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This article may help.
https://homeguides.sfgate.com/install-roll-roofing-low-slope-roofs-21346.html
One detail I saw on a site discussing common mistakes made when reroofing is that most people install the drip edge (at the eave) with the edge tight up against the fascia. This tightness can cause water to leak backwards (and actually upwards) to soak the fascia. They recommended adding a 1/2" x 1" strip of pressure treated lumber to the top lip of the fascia before attaching the drip edge. This moves the bottom of the drip edge further way from the fascia so water will drip into the gutter.
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paulz
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# Posted: 7 Oct 2018 10:21am
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Ah, the underlayment. Sorry, missed that. Thanks for the other advices.
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toyota_mdt_tech
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# Posted: 7 Oct 2018 10:39am
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My metal roof flashing goes over the top of the metal roof, but it is sealed with butyl tape too.
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Borrego
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# Posted: 7 Oct 2018 03:45pm
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May be different with whatever Gorilla Guard is, but with all roofing I've seen done right, the drip edge goes on the wood deck, then paper, then roofing material. Used to find a lot of roofs with the drip edge installed over the paper...usually rotten plywood underneath. Makes sense if ya think like a raindrop....
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ICC
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# Posted: 7 Oct 2018 06:20pm - Edited by: ICC
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Quoting: Borrego the drip edge goes on the wood deck, then paper, then roofing material.
Depends what edge of the roof you are talking about. On the rake of a gable roof the drip edge metal goes over the paper, as shown in the first drawing in the OP link, but on the eave the drip edge metal goes on first and then the paper over that. Read the last line in the attached image.
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Borrego
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# Posted: 7 Oct 2018 07:31pm
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Quoting: ICC Read the last line in the attached image.
Got it...nonetheless, most roofers i work with always install drip edge under paper. If water gets through shingles or roll roof, it can migrate along the paper and up under the metal edge material. I can see it both ways.....but I'm not one who always agrees with a theory just because it's in the code book.......
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ICC
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# Posted: 7 Oct 2018 08:31pm
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Well, what I was taught is the idea behind covering the rake ends of the felt paper, or other weather resistant barrier, with drip edge ensures that windblown rain that gets under the shingles will run over the underlayment, not on the sheathing.
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ICC
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# Posted: 7 Oct 2018 08:40pm - Edited by: ICC
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There is an exception I can think of. I forget the brand of ice-barrier it was, but the mfg recommended lapping the bottom edge over the fascia board at the eaves and then installing the metal drip edge over that. Any water than seeped under the metal was prevented from contacting the roof deck or fascia by the self-stick ice barrier. They had performance reports verifying that was okay and the inspector would pass that.
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roniemarkes
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# Posted: 14 Feb 2024 01:53am - Edited by: roniemarkes
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For installing drip edge on roll roofing, it's key to start with the drip edge along the eaves first before laying down the roofing material. This way, water gets directed off the roof and away from the structure. After the roll roofing is in place, you can add drip edge to the rakes for a clean finish. Make sure everything's nailed down securely and sealed to prevent leaks. It's a straightforward process, but getting it right can really protect your building from water damage.
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roniemarkes
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# Posted: 10 May 2024 12:53pm - Edited by: roniemarkes
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Quoting: roniemarkes  For installing drip edge on roll roofing, it's key to start with the drip edge along the eaves first before laying down the roofing material. This way, water gets directed off the roof and away from the structure. After the roll roofing is in place, you can add drip edge to the rakes for a clean finish. Make sure everything's nailed down securely and sealed to prevent leaks. It's a straightforward process, but getting it right can really protect your building from water damage.
ok
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gcrank1
Member
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# Posted: 10 May 2024 01:29pm
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Hmmm
Ok'ing yer own post....weird
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ICC
Member
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# Posted: 10 May 2024 03:30pm
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What's the spam? Or where is?
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paulz
Member
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# Posted: 10 May 2024 03:49pm
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Quoting: gcrank1 Hmmm Ok'ing yer own post....weird
Hey I do that all the time.
Keep it to myself though...
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Helwenbo
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# Posted: 12 May 2024 06:39am
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Quoting: gcrank1 Hmmm Ok'ing yer own post....weird
Haha , sometimes you just have to pat yourself on the back, right? Everyone needs a little self-approval now and then!
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