Firestone Pond Liners45-mil EPDM flexible rubber pond liner.
20-year manufacturer’s guarantee against UV
breakdown. Ozone resistant; will not blister,
crack, or deteriorate in direct sunlight.
FISH FRIENDLY! Liner weight is approx. .295 lbs. per sq. ft.
Video Transcript: When you start looking for pond liner for your pond there are a couple of things you want to keep in mind. Number one, you want to make sure that the liner you get is fish-safe and most liners are going to mention that. Now, if they are sold in a pond store or on a pond website, the odds are they are going to be fish safe, but you want to check that out and make sure it says fish friendly or fish safe somewhere on the webpage talking about that liner. There have been unfortunate instances in the past where people have used liners that were treated with chemicals. Let’s say for example, they were for a roofing job and liners were used sometimes as roofing in commercial projects, and if the liner has been treated with something that could be harmful to the fish, you will have an instant fish kill once you set up your pond. So check for that. The other things to keep in mind when you are looking for liner, is the thickness of the liner and normally we recommend a 45 mil thick liner. Sometimes if you are using an elastomeric liner or something that is really stretchy and is made to instead of puncturing right away it kind of gives. Those could be a little bit less, but typically, your best value is going to be on a 45 mil EPDM flexible liners. You can buy it by the roll or in a box.
Now, if you are doing a very large pond, you are probably going to end up buying a roll and that is pretty expensive because the shipping cost to get that roll from the factory to your home is freaking astronomical these days. It is very expensive. If you are doing a smaller pond, sometimes you can get away with the boxed liner. Now, we have box liners that are up to 20x20 and that is an advantage to you because those can normally be shipped UPS. And UPS is a much more economical way to have your packages shipped to you versus a truck line, and the liner in a box is a good alternative if you don’t need a special size. some of the liners are 100 foot long so if you are doing a monster pond you are going to have to go with a liner after all. But check for boxes just in case and don’t just look at the purchase price, because the actual delivery to your door price may be less - the box liner may appear more expensive until you look at shipping and you find out, “Wow! I saved a lot of money with that.”
The other things when you are looking a liner to be aware of is underlayment. Underlayment is kind of like the weed block that you would use in your garden, if you are familiar with that. It is just something that you put down first before you put your actual liner of top of it to protect it from any roots or anything sharp that you might have missed. Now, be sure you go through before you lay your liner and check for anything sharp. the last thing you want to do to a brand-new liner is puncture it. In the past we used to use old carpet or newspapers that were wet or anything like that. The underlayments today are so much they are so much cheaper by the time you go up and find rolls of carpet or whatever you are going to use instead and they are much more convenient. So I always recommend the underlayment. The other things when you are looking for liners that you might want to be aware of, are bottom drains, seaming and repair, and spray foam. Now, those are used for around your edging or if you are connecting; let’s say you are doing a pretty wide pond and you know you have two 25-foot-wide liners that you need to seam together to make it 50. Now, that’s when you are going to overlay those and then when the seaming takes place, it is not as scary as it appears.
The bottom drains, so that is another thing that kind of thing that spooks folks. The last thing you want to do is you after you put in your pond lier is to cut a hole right in the bottom of it. It is like, “Oh, my gosh.” but bottom drains are a great way for using external pump or any kind of draw out to an external filter to have all the sediment, the stuff that goes down to the bottom your pond, and be sucked right into your filtration, so you definitely want to consider bottom drains. And the spray foam is normally used when you have your liner up in your water fall and your spray foaming in your rocks. Most times with the waterfalls, when you first build one you will find you have tremendous amount of leaks. 90% of the time when I would go on site to work on a pond and it was leaking, I would find the problem in the waterfall. The algae builds up or someone will walk up on rocks or a dog would jump up on top of it and it will shift the rocks and all of a sudden it is diverting water out of the back. The spray foam helps keep your rocks in place on your liner and keeps that channel open and flowing down into your pond.