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Open Roads Forum  >  Class C Motorhomes

 > TPO roof?

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Fenway

Northeast

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Posted: 10/13/05 01:15pm Link  |  Print  |  Notify Moderator

We are looking at a Jayco Grayhawk. It says it has a "seamless TPO roof." What is TPO? Is it the same as a rubber roof?

Westronics

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Posted: 10/13/05 01:59pm Link  |  Print  |  Notify Moderator

Fenway wrote:

We are looking at a Jayco Grayhawk. It says it has a "seamless TPO roof." What is TPO? Is it the same as a rubber roof?


Sort of. Most rubber roofs are EDPM, TPO is a superior product. That's about it, really. Bascially, EDPM is older technology and not as good, though still quite popular - presumably because of price.

Youy can read more than you ever wanted to know here:

http://www.gaf.com/Content/Documents/10561.pdf


2002 Jayco Greyhawk 24SS, Camera, ScanGauge, Inverter, Airtabs, Portabote, SeeLevel II, Tireman valves, Xatnrex Battery Monitor, Aero-flo vent, Trik-L-Start, XPS Rib, Chains, Lil' Stanker, Be kind to septic systems Ford: 1-800-444-3311. RV Tires


Westronics

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Posted: 10/13/05 02:52pm Link  |  Print  |  Notify Moderator

Buckeyes wrote:

...In addition its life is only around 10 years...less than that in the RV industry.

...


?????

Where did you get that? EPDM life is shorter, is my understanding.

I cannot find a good web site that explains the difference. I have in the past, but cannot find anything now.

Big Katuna

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Posted: 10/13/05 03:00pm Link  |  Print  |  Notify Moderator

Thermoplastic Poly Olefin. They use it for decking material on battleships. It doesn't bleed black streaks on the sides of your unit like rubber and is much more resistant to deterioration from petrochemicals. It will still tear like a rubber roof but easily patches with Eternabond, I know, I just repaired a small tear last week. I have had rubber, aluminum, and TPO. Aluminum is far superior, TPO next, rubber last. I will never have a rubber roof again and will try real hard for aluminum next time, if there is a next time with these fuel prices. IMHO.


My Kharma ran over my Dogma.

Buckeyes

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Posted: 10/13/05 02:23pm Link  |  Print  |  Notify Moderator

"Superior" is in the eye of the beholder.

Rubber is the easiest to repair, the most flexible of all roofing membranes and has the longest track record (40+ years). As well as being naturally resistant to the sun.

TPO is basically a Thermo Plastic roof. It is not as flexible as rubber, which makes it a little tougher to install and repair. However it is whiter than rubber due to additives and is UV resistant (once again due to chemical additives). Some people complain of bubbles forming due to the adhesion process which doesn't tend to laminate as well as the rubber. In addition its track record is only around 12 years...less than that in the RV industry.

So to say it is "Better than rubber" is misleading. In some ways it is better, in some ways it's worse.

Either way it supposed to keep the water out...proper factory installation is more important than which material.

PS: the cost of TPO compared to rubber is pretty much a wash. Most MFG's use rubber because it is easier to install, repair and folds over the corners of the RV.

* This post was edited 10/13/05 02:45pm by Buckeyes *

DevinPhilips

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Posted: 10/13/05 03:21pm Link  |  Print  |  Notify Moderator

Doesn't the TPO roof carry a 12 year warranty?

John S

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Posted: 10/13/05 06:19pm Link  |  Print  |  Notify Moderator

Well I learned something from reading this post. At first I would have thought TPO referred to Tar Paper Overhead!!! Now I know better.


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Westronics

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Posted: 10/13/05 03:47pm Link  |  Print  |  Notify Moderator

DevinPhilips wrote:

Doesn't the TPO roof carry a 12 year warranty?


Looks that way - a quick web search showed several RV manufacturers carrying a 12-year TPO roof warranty. Looks like EPDM also is 12 years, at least in many cases.

I appears that either product will outlast the MH. Note that EPDM does get thinner over the years, but I am not sure if that has makes any practical difference.

Both are very sensitive to petroleum products being used on them, so no advtange either way there.

TPO will not generate the same types of black streaks resulting from EPDM "chalking.".

* This post was last edited 10/13/05 04:05pm by Westronics *   View edit history

Westronics

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Posted: 10/14/05 08:09am Link  |  Print  |  Notify Moderator

Wizzard_of_Odds wrote:

Buckeyes wrote:

"Superior" is in the eye of the beholder.


I agree, and with that said, aluminum is superior to both rubber and TPO.


Well, for most purposes, I agree. It's more expensive and noisier in the rain, but, other than that, aluminum is best, with the possible exception of fiberglass, So far, though, I have been unimpressed with fiberglass roofs because they all seem to be a very thin layer of fiberglass over wood - not what I think of as having the strength of fiberglass, certainly.

In then end, all roof choices should last the life of the rig but rubber, especially EPDM, does require cleaning several times a year. If you re-seal you aluminum or fiberglass roof with Eternabond tape everywhere, it should be virtually maintenance-free, as I think a roof really should be.

Wizzard_of_Odds

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Posted: 10/13/05 06:34pm Link  |  Print  |  Notify Moderator

Buckeyes wrote:

"Superior" is in the eye of the beholder.


I agree, and with that said, aluminum is superior to both rubber and TPO.


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