I went to my supplier the other day while pricing out the job and got a price on a 500 ft roll of geotextile fabric...i dont remember exactly the number but it was over 500 dollars! Now does everyone use this fabric because they were told to by icpi? I dont know, sometimes I think some of these standards are set just so certain businesses will sell there product. My supplier told me no one is even buying geotextile anymore. He said alot of people are just buying landscape fabric to use between the base and soil. What are your guys thoughts on this???????????