Jeff Higdon wrote:
However, I got sprayed with some water that was in one of those tanks and it gave me a mild chemical burn. That got me to thinking: Do I really want to live with those chemicals in my house for the next 50 years?
After looking online, I came up with www.repurposedmaterialsinc.com. They sell 45 mil rubber roofing for $400 for about 2000 square feet.
The only problem is the holes and irregular shapes. I went and talked to a roofing contractor who installs it, and he told me of a tape you can buy to seam it, though I have not sourced that yet.
They also sell billboard vinyls which could be used for many applications.
What about cleaning the liner from those tanks? I guess there is a trade off to consider there. Which is more efficient use of time and effort? Cleaning (if feasible) the "free*" liner versus patching the used roofing material.
I would think something similar to what is used to patch inner tubes for tires would work for the holes, cut outs. Labor intensive for sure depending on the material. Might would even make sense to trim that material in straight lengths then glue them together. That might would provide more installation control when repaired seams could get ripped off and end up with leakage.
* when i say free there is still a cost for moving, handling, storing, your time, etc.
Do you have any data on the vinyl? Thickness, cost, etc.