An addition was put on the back of a ranch house. The roof was run from the eave of the addition up to maybe 18″ from the ridge of the original roof. This new roof is low slope and EPDM was used to roof it.
When they got to where the new roof tied into the old, they just ran the rubber up to the ridge and secured it with new cap shingles.
But at the edge of the new roof (the addition isn’t as long as the house) they edge of the rubber going up that last 18″ is not secured in any way.
See the pic.
My first thought is water cut off mastic under a 19″ term bar screwed down, but that is putting holes where one doesn’t normally do that.
Any thoughts?
Thanks.
Rich Beckman
Another day, another tool.
Replies
That edge should have some form of metal drip edge installed over the field membrane,then 6" elastiform flashing glued over it and onto the field EPDM.
Finish by using lap sealant on both sides of the neoprene flashing strip.
term bar would be applied on a vertical surface.
I don't understand the drip edge. The shingles continue on in the same plane as the rubber. Is the 6" elastiform flashing also glued to the shingles?Is the neoprene flashing strip the same thing as the elastiform flashing?The lap sealent is at the edge of the neoprene/elastiform and the shingles?Thanks.Rich BeckmanAnother day, another tool.
Rich,
My mistake-I looked quickly and thought the roof pitches were dis-similar,prompting my first response.
It's hard to tell from your picture,looks like the plane of the rubber is above the shingles.Could you post a pic from a little further back?
Piffen may be right ,pull off the shingles,extend the membrane out-then reshingle.
"Piffen may be right "LOL! Oh yes! Piffen IS right. And that's what I would do if they could afford it. But they can't, so....I don't know about the pic. I bet I have one, but I doubt I can find it.But I've received Piffen's qualified blessing for what I figured should be done, so I'm gonna do that.Thanks.
Rich BeckmanAnother day, another tool.
Another concern is that asphalt is incompatible with EPDM - it causes the rubber to turn to jelly. They should not be in contact.
I'm not seeing where they are in contact - for purposes of discussion and understwanding for the furture, not for arguement.The EPDM lies on top of the granules. I would suspect rubbing against them would be worse than contact with asphalt My undersatanding was that it is usually ashphaltic compounds that are still unstable and off gassing is what causes reactions with EPDM - like if somebody tried to lay it over a hot mopped job or to patch to EPDM with hot stuff or a bucket of plastic roof cement.As long as he is using an EPDM caulk on the term bar, he should be fine on this one.
Welcome to the Taunton University of Knowledge FHB Campus at Breaktime. where ... Excellence is its own reward!
I searched all the EPDM sites I could find and the only reference to asphalt was what you're talking about. I've seen many aplications where the EPDM runs up under the shingles and have yet to see any jelly.
"Let's go to Memphis in the meantime, baby" - John Hiatt.
http://grantlogan.net/
>>>>>like if somebody tried to lay it over a hot mopped jobThe info I got from the Firestone site was that it was OK to hot mop adhere the recovery board below the EPDM over metal decks. Hmm?
"Let's go to Memphis in the meantime, baby" - John Hiatt.
http://grantlogan.net/
They are probably saying that the recover bd isolates from direct contact.
Welcome to the Taunton University of Knowledge FHB Campus at Breaktime. where ... Excellence is its own reward!
Take my comment more as a warning than specific recommendation. Firestone's data sheets (and the rep) are the source of the information that asphalt is incompatible with EPDM.
Personally, I don't like "do overs", so I make sure the EPDM is at least a foot away from ANY asphalt when I do a roof - and make sure that drippage from asphalt shingles, etc. is not hitting the EPDM. But that's just my personal work practice - it could be fine to have them closer together.
I'd remove the rige and peel it down to the break, tear off the shingles, and relay the EPDM, then shingle over it up to the ridge.
oh yeah - and put ridge cap back on...
Welcome to the
Taunton University of Knowledge FHB Campus at Breaktime.
where ...
Excellence is its own reward!
Piffin,Yes, I know. But that would be expensive. And they have already squandered oodles of dollars on this addition and correcting problems.So I need a cheapie here.
Rich BeckmanAnother day, another tool.
Well, you did ask for "fine"Cheap - I'd use the termination strip here with plenty of ployurethene caulk at and under fasteners. I would not even consdiier that if this were down near the eaves, but this close to the ridge, not as much water will be coursing over it.
Welcome to the Taunton University of Knowledge FHB Campus at Breaktime. where ... Excellence is its own reward!
Thanks.Rich BeckmanAnother day, another tool.