Larry,
Marathon Fort Worth did my roof in the spring and while I have no real data it has seemed to do it’s job. We get plenty of Texas sun and heat here and had no issues with the coach cooling this summer but obviously other factors are involved. A side benefit also seemed to be some sound reduction. My old roof was original and the seam sealant had dried out completely. The best I can really say is overall I am satisfied with the results, there seems to be other benefits of sound reduction almost like the roof was tightened and seam sealing. Marathon was great and very customer satifaction oriented. Good luck.
George & Becky
02 Country CoachW/No-See-Um-Rivets
GMC Sierra and Jeep Wrangler
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