The one thing I did not like about a Newmar Dutch Star was the TPO roof system. Having to go up on the roof once a year or after every trip with years of problems with both fiberglass and "one peace" roofs with seams. I went with the Flex Armor spray on roof that takes out the need to go up there and reseal it. TPO was on it as well as someone's roll on sealer and it still leaked. Well worth the money to have someone install this life time transferable warrantied roof system.