I re-did mine with the reflectix a couple of weeks ago. Used around half the the 24" width roll. Might go back and do a 2nd layer. I did overlap it on the top cover because it wasn't quite wide enough, so it's almost fully doubled there. I used 3M 90 adhesive to attach it. So far, so good. I THINK it's a little quieter, but the last time I was on the water prior was last year. My son thinks it's better, and I seem to be able to hear the radio better while cruising.