Forum Discussion
silversand
Feb 29, 2016Explorer
wvabeer wrote:
I guess I got one of the good ones with the aluminum roof. That TPO is garbage.
...our TPO roof was installed during manufacture of our truck camper back in Feb/March 2005 (for pick-up by us at the factory in May 2005), and after 11 years of use, it still looks like new (despite a small "dent" in the TPO due to my dropping of a 10 LB steel tree pruning head, from a height of ~21 feet, onto the roof).
You should be aware of the changes in TPO formulation over the years, and the lapse of the patent (I believe in 2010), that allowed numerous manufacturers to jump into the TPO manufacturing fray.
Carlisle SynTec Inc., the manufacturer of our TPO membrane, changed their formulation in ~2007, to, "...enhanced ultraviolet and heat-aging stabilizers intended to improve long-term membrane performance." Then, after the expiry of patent, reportedly new manufacturers jumped into the TPO game with their own formulations...there was talk that a 2010 revision to ASTM D6878 (membrane heat testing, to increase from 240 F for 28 days, to 275 F for 56 days) by the TPO manufacturers, was supposed to be voted on by ASTM voting members....I don't know if this was ever adopted.
We have the pre formula change TPO chemistry from Carlisle SynTec, allowing for a less complicated lap sealant application (one part, not 2 part process).
Anyhow, it is up to the RV buyer to do their due diligence vis-à-vis the various RV components (shell, roof, windows, siding, frame, floor and appliances) when shopping for a new unit.
On edit: ....as an afterthought, many people get TPO confused with EPDM rubber roofing membranes...very, very different products and very different puncture, tear and UV-A & B resist.
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