Tough-Liner is my made-up name for plastic sheeting that is tough enough to withstand abrasive concrete and tough enough to stop termites chewing through it. I use lots of it in my foundation design so it needs to be fairly inexpensive.
I used to use Fab-Form (now called FastFoot) for this function but the availability and price of it has become prohibitive.
1000 sq. ft. FeltBuster Synthetic Roofing Underlayment Roll
90 day exposure
6 months UV exposure. 20x stronger than 30lb felt.
Grace SYN 15 48 in. x 250 ft. Roll Synthetic Roofing Underlayment
This is a lot weaker than Tri-Flex and is not UV resistant, but it is cheaper.
http://www.homedepot.com/p/Grace-SYN-15-48-in-x-250-ft-Roll-Synthetic-Roofing-Underlayment-5008070/204423141 $71.72 for 4'x250' Not currently available from Home Depot.
Grace SYN 15 underlayment is an engineered woven fabric, coated on both sides with polypropylene. 1 month UV exposure.
"90-day UV resistance refers to standardized testing conducted by GAF to ensure the product will not physically degrade when exposed to UV. It is NOT related to withstanding water, snow, or wind. While FeltBuster™ High-Traction Synthetic Roofing Felt is water resistant, it is NOT WATERPROOF. DO NOT USE FeltBuster™ High-Traction Synthetic Roofing Felt as a temporary roof to protect property or possessions. "
DuPont Tyvek RoofLiner - 4' x 100'
This no longer seems to be available (at least not at a sensible price).
http://www.amazon.com/DuPont-Tyvek-RoofLiner-100-Roll/dp/B00HAQTBKW $69 + $0 tax + $0 shipping
This membrane sheeting is for constraining wet concrete.
FF50-100 FastFoot Concrete Footing Form Fabric
50" x 100' roll Also 62" and 74" widths
Try buying from Masons in Woodinville.
http://stonetooldepot.com/fast-footformingfabric.aspx $112.57 + $31.05 shipping
Fastfoot® footing forming system consists of 120’ rolls of high density polyethylene scrim coated with low density polyethylene. The scrim provides the tensile strength to withstand the concrete forces, while the low density coating acts as the capillary break, preventing the ground moisture from entering the footing concrete.
The following links no longer work...
Used to be able to get a 62" x 120' roll for about $95.