I am planning to install a pond in my yard, and have been researching liner materials. I have been told that EDPM rubber is good, but is too thick/heavy to use on smaller ponds (mine will be about 8' x 12'). 40mil PVC has been recommended as a good material. What about 20mil or 30 mil PVC. Does anyone have any input/suggestions? Also, is this material available commercially without being sold as "fish-safe" or "pond liner" at a more reasonable price? The cost from pond supply outlets appears to be extremely high! Seems that this same PVC material is probably used in the construction industry, at a more reasonable price!

While I am not an expert on pond liners, but I did stayed at a Holiday Inn Express last night.

Really, I just watch to much TV.

I would go with the Rubber. PVC breaks down, gets brittle and would need replacing sooner.

The rubber also conforms to the soil under it and prevent objects from penetrating.

If I were doing this work, I would want to do it once and not have to tare it to re-do after awhile.

Like I stated, I'm no expert so anyone who has more experience, please feel free to post your notes.

The EPDM is by far the best for what you want. I have bought several rolls, but it comes in 10x100 or 20x100 at 27 cents a sq ft.

Check with Roofing Contractors in your area and you might be able to find a small amount at a price you can live with.

I've seen the same material at Lowe's for about $1.00 a sq ft. (in pond supplies). That is expensive.