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Old 05-12-2014, 05:05 PM   #1
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Flat Roof Membrane


Which is better and why?

EPMD or TPO?

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Old 05-12-2014, 10:24 PM   #2
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EPDM is what you mean and whichever system is installed better is the better system.

Both are fine.

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Old 05-13-2014, 01:20 PM   #3
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You will get no less then 1K answers to this. It depends on where you live, if the roof is used for anything, residential or heavy traffic commercial?

Both are good systems, if installed correctly.
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Old 05-13-2014, 08:42 PM   #4
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TPO is the "rolled-roofing" of membranes
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Old 05-13-2014, 09:23 PM   #5
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Originally Posted by 1985gt View Post
You will get no less then 1K answers to this. It depends on where you live, if the roof is used for anything, residential or heavy traffic commercial?

Both are good systems, if installed correctly.
This is for my flat roof portico in front of the house with no traffic.
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Old 05-14-2014, 11:52 AM   #6
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EPDM is probably more easily installed properly in this case.
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Old 05-14-2014, 12:01 PM   #7
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Originally Posted by OldNBroken View Post
TPO is the "rolled-roofing" of membranes
Disagree, TPO has become a decent product. Way back when it was a bad product, but so was PVC, and EPDM when they first came out.


Hypolan how ever never was any good.


EPDM would be a fine choice in this.
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Old 05-14-2014, 05:38 PM   #8
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Originally Posted by 1985gt View Post
Disagree, TPO has become a decent product. Way back when it was a bad product, but so was PVC, and EPDM when they first came out.


Hypolan how ever never was any good.


EPDM would be a fine choice in this.
does EPDM need to be reinforced? my application does not involve any foot traffic.
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Old 05-14-2014, 07:24 PM   #9
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No.

Should be good.
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Old 05-16-2014, 02:09 PM   #10
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No, no need for this.
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Old 05-16-2014, 05:43 PM   #11
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Old 05-16-2014, 05:43 PM   #12
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No, no need for this.
Copy Cat....Zinger!!!

Its Friday boys and gals!!!!

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Old 09-04-2014, 01:06 AM   #13
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@1985gt - when did TPO become "better"??? where is the proof?

It's only been 3 years since the WRCA issued a warning about TPO failures in 2011, thus new formulations are about 2.5-3 years old - so how can you say it has become better when it is (once again) a completely untested product.

Depending on application EPDM can be ok, but in my opinion only if it has some slope and very few penetrations. Best is PVC (again in my opinion) and based on my 10+ years of installing it.
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Old 09-04-2014, 01:43 AM   #14
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@1985gt - here is a good read http://www.tporoofing.org/pros-and-cons-of-tpo-roofing/
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Old 09-04-2014, 08:15 AM   #15
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Originally Posted by coolflatroof View Post
@1985gt - when did TPO become "better"??? where is the proof?

It's only been 3 years since the WRCA issued a warning about TPO failures in 2011, thus new formulations are about 2.5-3 years old - so how can you say it has become better when it is (once again) a completely untested product.

Depending on application EPDM can be ok, but in my opinion only if it has some slope and very few penetrations. Best is PVC (again in my opinion) and based on my 10+ years of installing it.
TPO has been better for awhile, when TPO first came out it did not have reinforcements, that was a terrible product and still hasn't recovered from that. We have TPO roofs going on 10+ years right now and still look good to this day. On that same note a few years ago we replaced a TPO from a manufacture we don't normally use because the top layer had warn through to the scrim next to the welds. I believe strongly that this case was improper installation.

While PVC is good its not always the best choice. While PVC is a great product it had a crappy track record at first also, and there is some brands that I wouldn't use on my dog's house. The funny thing is I've seen more problem Duro-last roofs then I have seen bad TPO roofs.

As far as EPDM, and the needs to have slope and few penetrations. I can't believe people still can't get past the fact EPDM has come along way since all the details were glued, hell that was 20 years ago. Everything is taped and like any other product if installed correctly will last many many years.

If you want to go the best of the best, I'd put up an asphalt and gravel roof against a PVC roof any day of the week, not only will it last longer, it's more durable and would be about or below the same cost.

So I'm sure the OP has long since replace the roofing but you seemed to want to make a point.

1. Not all TPO's are the same. We have GAF and Versico TPO roofs that are at or around the 10 year mark. No issues with them at all. I will say TPO is harder to weld and that is a areato look at for picking a contractor to install one. I've only seen 1 TPO roof fail that I can remember in my 15 or so years around. That manufacture replaced the roof and insulation under warranty and the tech rep admitted around that time they had some issues that roof was 8-10 years old. I still believe that to hot of welds was partially to blame. We did not install the original roof we did install the replacement.

2. Not all PVC's are the same. Some are better then others. They are a very good sheet but not with out their limitations. Like with TPO I would not install one on a walk out deck with out some walking surface on top. They like all single plys are not durable enough for some commercial and most industrial applications.

3. EPDM is still a great choice, along with any other roof system installation is key.

4. Asphalt roofs are the strongest, they are the most durable and do not require as much maintenance when installed properly. But I think everyone should put them first on the list to use for the next roofing project.






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Good read and almost no TPO bashing.

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