R-15 vs. R-13 Insulation Do you feel r-15 fiberglass insulation is a better product that r-13 fiberglass insulation? Is it worth the extra money? I am located in McAllen, Texas. Sam Listen to Tom’s answer: https://media.blubrry.com/homeshow/homeshowradio.com/wp-content/uploads/2012/04/Sam.mp3Podcast: Play in new window