I dont have a good recomendation on where you should go for a quality liner other than maybe a local pond supply house but I would not go for cheap at Lows or HD and please dont try to tape or splice one together.

You will have alot of work into your pond when it is all done and established and the liner is its foundation. A high quality heavy liner will last many years without leaks.

Just my 2 cents,
Mike

Mike,

I have an existing pond and I was looking at a replacement liner, I couldn't remember but I think the one I have is a 45 mil one. Anyway it's lasted for 20 years and is still ok except where it meets the rock edges. I agree I want something which will last!

Thanks,
Martha

When I got my liner 6 years ago, I would have been happy to find a local roofing supply, but I couldn't find any source. Therefore I used a website that seemed to have the best shipping (trucking) charges. At that time it was Webbs Water gardens. I would compare prices, but remember that the shipping charges are a significant proportion of the total cost.

Menards carries 45m EPDM at good prices. Roofing Rubber is pretty much the same as the stuff sold for ponds. The only difference I have heard any evidence for is the pond EPDM has talc on it to prevent sticking. That washes off quickly and doesn't hurt the fish. Roofing rubber doesn't have talc because it must be glued down. Check other sources for roofing rubber.