Anyone Have Issues With Grace Triflex 30 Leaking?

Morning Wood

I have one question I am getting at basically. But let me set the scene. Framed this winter and covered roof with triflex. I used roofing tins held down with manual hammer tacker staples and roofing tins held down with 1/4" crown stapler. Seems the 1/4" crown staples when not driven to the proper depth (too deep) caused leaking. Not sure if the manual hammer tacker staples caused any leaking. I don't think so. Just getting around to roofing now and want to deal with leaks in triflex. Do you guys think it is ok to just cover the roof with 15# felt as I roof it?(main question) Or do you think I will have moisture problems with felt and triflex together?(i.e. roof won't be able to breathe enough beneath shingles. Roof is both cold and hot in spots. I am roofing with Certainteed 30 years Landmark Woodscapes asphalt. Perfect world I would cover the roof with double covereage 30# felt regardless of pitch and roof right away. Thanks, Wood.

jkfox624

I guess i dont understand the problem. Im assuming this is a synthetic underlay? Im probably wrong but if its properly shingled what does it matter if the underlay could leak in a few spots, it shouldnt see the light of day again until the structure gets reroofed.

WarnerConstInc.

They never used to use underlayment.

drive55cat

If the roof is vented properly under the deck you should be allright.

Morning Wood

Yeah yeah I know. But it is just a thing with me. I like to make sure that the underlayment is not leaking or pretty damn close. If by any chance the roof does leak than there is something else to back it up. Mainly worried about permeability with two different layers of underlayment.

Mitchell Const.

When you shingle it you will ultimately be peppering the underlayment with holes anyway

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Morning Wood

No one is telling me what I want to hear. So goes the internet.

tinner666

If you're worried about the sweating under the wet/torn/affected areas, just tear them open, let them dry and install the roof. Underlay just keeps it dry until the roof goes on. No other purpose that I can see, as far as waterproofing goes.

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Frank Slate Roof Repairs, Richmond, Va.

jkfox624

I had one roofer tell me all the underlay did was act as a slip barrier for the shingles when they expanded and contracted. His theory was if the rubbed on the plywood they would age prematurely. Kinda makes sense but it felt like one of those blowing smoke moments.

Tinstaafl

I don't tell my wife what she wants to hear either, when she's out in left field. That's why we have a 7' couch.

Quit being anal about it and just shingle it. If you do that properly, the underlayment will be superfluous.