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Old 01-07-2009, 03:59 PM   #16
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Rubber Roof over Ice & Water Shield


sounds like skylight issues,and they don`t want to flash it with shingles,they`re worried about 2 ft of snow,but it could be flashed properly to work IMO

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Old 01-07-2009, 05:33 PM   #17
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Rubber Roof over Ice & Water Shield


Yeah, that's what Im thinking, to, TRG.
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Old 01-07-2009, 08:30 PM   #18
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Rubber Roof over Ice & Water Shield


I always flash old leaky skylights on shingle roofs with 9" or 12" epdm peel and stick. Right to the glass and 4"-6" onto the shingles then caulk. Never had a call back on one yet.
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Old 01-07-2009, 09:09 PM   #19
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Rubber Roof over Ice & Water Shield


Is it indeed the skylight that's leaking?

There are better ways than covering the problem with rubber.
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Old 01-08-2009, 11:22 AM   #20
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Rubber Roof over Ice & Water Shield


Picture enclosed. The area with the sliding glass doors is 4/12 pitch. There are 5 skylights on that pitch all with curbing. One skylight is on the 8/12 pitch above it and one at the pitch transition. The two lowest skylights are leaking. They do not have step flashing on them so the ice & water shield has been the only protection there.

Yes, the skylights could be reflashed & the problem would go away but the 20 year roof has only 3 years left on it. The cathedral ceilings are 30 feet long (sophet to ridge) with R30 insulation so ventilation is poor and ice dams are a problem. We had 2 feet of snow on the roof last week.

I am not that comfortable just putting a new 3 tab shingle over I&W shield with such big ice dams (foot thick sometimes). I could tear out the ceiling put in R50 spray foam & reinstall it & then I think I&W shield would be okay. This is costly. The roof isn't all that visible & membranes don't seem that more expensive than shingles. Yes, it is a big slope for a membrane. Any better ideas? Thanks.
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Old 01-08-2009, 03:24 PM   #21
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Rubber Roof over Ice & Water Shield


LOOKS STEEPER THAN A 4,PROBABLY CLOSER TO 5 OR 6 pitch,changing into a 7 or 8 pitch main roof---If the issues are mainly the skylights ,you could build temporary insulated boxes over them for winter,I would use Certainteed Flintlastic SA 3part (white mineral surfaced) system once the weather is over 50 degrees,so the materials seal properly---It`s a 15 year mfgr warranty,but 20 year is available for commercial propertie`s when they use the exact same material-They figure a residential roof is prone to more foot traffic,and hence will wear out faster as a result
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Old 01-08-2009, 09:54 PM   #22
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Rubber Roof over Ice & Water Shield


The roof is definitely 4/12 and 8/12. It appears to be steeper because the ground slopes. Yes, The Flintilastic looks like a good solution. How long do you think it will last? I would like to get a 30 yr 3 tab shingle roof for the rest of the house.

PVC seems like a better product because the seams are welded, not glued and perhaps snow slides off easier? PVC might be overkill for 4/12 though.

Would I tear off the layer of shingles & nail the bottom layer of Flintilastic to the I&W shield? Can the roofer use a nail gun? Thanks.
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Old 01-08-2009, 10:02 PM   #23
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If the ice gets that thick in your area, you might want to raise those curbs. Even if you membrane roof the lower of the slopes, ice will still be able to back up over the top of the skylights themselves and work its way in between the layers, over the curbs, over the flashigns, etc.

The SPF would be a bit costlier, but would save on heat loss as well as create a true vapor barrier if you used a closed cell, and could be accomplished when you tear off the roof.
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Old 01-08-2009, 11:50 PM   #24
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Rubber Roof over Ice & Water Shield


Quote:
Originally Posted by AaronB View Post
Is it indeed the skylight that's leaking?

There are better ways than covering the problem with rubber.
Not really. If you flash the skylight with epdm it wont leak anymore.
Before shingling or after either way it wont leak if its done right.

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