I am confused on EPDM and TPO roofs. This is the questions I have.
1. How to tell the difference (my owner manuals does not address the kind of roof).
2. Which one is better?
3. It looks like most sealers and products can be used for both, is the true or should I be very careful checking out the products?
4. Anything else I need t know or web sites that might give me some help.
I have a 2000 Fleetwood Discovery 36T MH.
Per the Canadian National Research Counsil...here is the bottom line between TPO and EPDM roofing materials. TPO is the newest of the two.
In general, TPO membranes are being marketed as a product that combines the properties of EPDM and PVC, without the associated drawbacks that the latter two materials have. In other words, they are supposed to be as UV-resistant and as heat-resistant as EPDM, and as heat-weldable as PVC.
The following benefits and characteristics have been reported for TPOs:
environmentally friendly and recyclable
seams can be heat welded
available in many colours
resistant to heat and UV degradation
resistant to many chemicals
good cold-temperature flexibility
no external plasticizers added.
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Keep in mind Alpha Systems EPDM roofs are not the same thing as most of us call EPDM. You can not used Liquid Rubber/Liquid Roof (same products but different market channel/pricing) with the Alpha Systems EPDM per their website.
I have the EPDM on my Bounder. Warranty card from Alpha Systems says I don't need any of the after market sealers, I only need to clean it once or twice a year with a mild abrasive cleaner, like Comet. I usually get up on the roof in March, give it a good scrub, check the end caps and protrusions to ensure I don't have any cranks in the seam sealer, fill in any cracks with the Alpha leveling seam sealer, and off I go. So far so good...
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