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Open Roads Forum  >  Travel Trailers  >  General Q&A

 > TPO versus EPDM

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Yardvarkers

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Posted: 03/08/18 04:52pm Link  |  Quote  |  Print  |  Notify Moderator

Hello. I own a Jayco Eagle and I will be trading for a new 2018 Grand Design Imagine travel trailer in the next few months. My Jayco has an EPDM roof. The Grand Design has a TPO roof. Which type is better? I think the TPO is better than the EPDM but there's probably different opinions about that. Any opinion and suggestion will be greatly appreciated. Thanks, C. Miller


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Posted: 03/08/18 05:47pm Link  |  Quote  |  Print  |  Notify Moderator

From my experience, both the physical EPDM or TPO membrane are both good. There are some different types/vintages of TPO. Do you know which are coming on your new camper?

The problem with both is the sealants used at all the edges and roof penetrations.

Have fun with the new camper.

Thanks

John


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Lwiddis

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Posted: 03/08/18 05:47pm Link  |  Quote  |  Print  |  Notify Moderator

Haven’t you already decided to buy the new RV? So if one was better than the other...?


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Posted: 03/08/18 06:49pm Link  |  Quote  |  Print  |  Notify Moderator

No. I don't know what the TPO type is. I'm sure that it has a fabric backing though.

mbopp

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Posted: 03/08/18 06:50pm Link  |  Quote  |  Print  |  Notify Moderator

Grand Design uses an Alpha Systems TPO roof.
BTW - there are very active Facebook pages for Grand Design & Grand Design Imagine owners.


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Lwiddis

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Posted: 03/08/18 06:57pm Link  |  Quote  |  Print  |  Notify Moderator

“I'm sure that it has a fabric backing though.“

So what? You have already decided to buy the Grand Design. The horse is out of the barn. Closing the gate makes no difference.

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Posted: 03/08/18 08:43pm Link  |  Quote  |  Print  |  Notify Moderator

The TPO roofs that Jayco currently uses do not have a felt/fabric backing. The TPO roofs used to have felt backing which caused water damage because the felt would get wet and stay damp.

Yardvarkers wrote:

No. I don't know what the TPO type is. I'm sure that it has a fabric backing though.



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rbpru

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Posted: 03/08/18 09:15pm Link  |  Quote  |  Print  |  Notify Moderator

If your roof leaks it usually not the materials, it is one of the numerous seals that has started to leak.

Every manufacturer will tell you why they use what they use and why it is superior to the other materials.


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Bumpyroad

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Posted: 03/09/18 04:55am Link  |  Quote  |  Print  |  Notify Moderator

TPO vs rubber. no contest
TPO all the way, not fabric backed however.
bumpy





SoundGuy

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Posted: 03/09/18 05:46am Link  |  Quote  |  Print  |  Notify Moderator

Yardvarkers wrote:

No. I don't know what the TPO type is. I'm sure that it has a fabric backing though.


In simple terms TPO is vinyl, EPDM is rubber. About 10 yrs ago Jayco for a period of time was using felt backed TPO on some models until it was later discovered that the felt was wicking in and retaining moisture. I know of no TPO membrane used today that has felt backing and given the choice would prefer TPO over EPDM. Our current Coachmen has an EPDM roof and as is typical has the odd wrinkle, our previous K-Z Spree had a TPO roof which was perfectly flat & even throughout.

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