I dug through some of the vendor parts I bought a year or more ago and found all my anti squeak material. I also got a 3'x 3' sheet of the stuff roofers torch and cover flat roof areas. It has a fiberglass base and is between 1/8" and 3/16' thick. I believe it will work much better and for much longer than the felt stuff you buy. A couple of pics below:

http://s729.photobucket.com/albums/...ew&current=PB130345.jpg&newest=1

http://s729.photobucket.com/albums/...ew&current=PB130345.jpg&newest=1


~Jim