We've probably installed more rhizome barrier than any other group in the country.  This stuff works.  We're happy to be the best source of barrier in the Carolinas. Keeping bamboo under control is quite easy, but getting it to that state can be a chore.  There is nothing that control bamboo so well, with such little maintenance, as bamboo rhizome barrier.  We only use and recommend 30" depth, and 60 mil for small and midsize bamboos, or 80 mil for timber bamboos.  Made out of high-quality HDPE with UV protection, it will last indefinitely. UPDATE: We are now only carrying 80mil to make things simpler and safer. Some of the larger and more aggresive mid-sized bamboos are safer with the 80mil, but it is too much of a gray area so we've decided 80mil is better for everyone. Even if it's a smaller bamboo, the 80mil will stand up better to the wear and tear of normal foot traffic, lawn mowers, etc.

80 mil, 30" deep - for all bamboo types in the ground
Custom cut to any length up to 300'
Less than 100' - $4.79/ft
More than 100' - $4.49/ft
More than 300' - $4.29/ft
Shipping available at cost.
Weight is about 1 lb per foot.

60 mil, 21" deep - for lining planters
We found the 80mil not to be flexible enough to do well in planter installations and that it is a lot of work to try to trim excess height off. This size is perfect for galvanized stock tanks and may other planter types without a lot of extra work.
Custom cut to any length up to 300'
Less than 100' - $3.29/ft
More than 100' - $2.99/ft
More than 300' - $2.69/ft
Weight is about 1/2 lb per foot.