Perry has it right on the money re: make sure vent plastic is not cracked. Ours are cracked and we have bought two new ones one is already in and looks so pretty. We believe that is the source our leaks. To Dusty: go on the roof, remove all old caulk and look under there to see if the base is broken and cracked. Given the age of yours, it is probably ready for replacement. Dear Vintage, thanks for information re:white roof. What exactly did you put on there? Brand and source? How many gallons will we need? For 34' AS. I just saw at the end of your post EPDM coatings. Is that what you recommend? Thanks for all info!