5 Things to Know Before Buying epdm pond liner manufacturer

Adding Liner for the Waterfall

If your waterfall is on the smaller side, or sits quite close to the edge of your pond, it is usually easiest to simply extend the liner size out a bit to cover the waterfall as well as the pond. When figuring out how much liner to add for the waterfall, add the vertical height of the waterfall and the horizontal distance from the lip of the waterfall filter to the edge of the pond. If the waterfall is 2’ high and the front of the waterfall filter sits 2’ back from the edge, then you’d want to get at least 4’ of extra liner. If the waterfall is placed in such a position that it’s awkward to just add length to the actual pond liner, you can also use a separate piece of liner, which we’ll discuss next.

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Using a Separate Piece of Liner for a Waterfall or Stream

If you have a larger waterfall or a stream, depending on its placement, it can sometimes be easier to get a separate piece of liner instead of extending out the main pond liner. For example, if the waterfall or stream was on the corner of the pond, getting one large piece would mean extending both the length and the width of the main liner to cover the waterfall on the corner. This can result in having a lot of wasted material, which can increase the cost unnecessarily. For situations like this, you can buy a second piece of liner just for the waterfall. However, there are a couple important things you’ll want to do to prevent any leaks:

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1)  When installing the stream or waterfall liner, overlap it over top of the main pond liner so that it runs down over the edge of the pond at least a few inches. Installed this way, any water running down the waterfall or stream will run right into the pond without encountering a seam in the liner. Try to buy a little extra liner so you don’t come up short. You can always trim it to the perfect length after it’s installed.

2)  Make sure there’s a constant slope downwards towards the pond from all locations in the stream or waterfall. This will ensure that the water will always be running downwards and won’t trickle back up the stream to create a leak.

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I used the hdrpe for the first 9 years, and again when I expanded, getting one larger liner. The old one was in great condition and I used it for re-lining my bog v1 and mini stream.. For most applications, you don't need the underlay. If you have sharp edges anywhere or roots you're worried about, then use the underlay but if you go to the hdrpe site, they'll state exactly as I have above. Most peeps go for the EPDM as it's more an industry standard but I like the much better cost and since it's lighter, better shipping rate + easier to move by myself. A negative re hdrpe is that you'll have more issue with folds and how to hide them than with EPDM. But with EPDM, you DO need the underlay. If you research, you'll see HDRPE is harder to puncture/tear, so it's a worthy alternate to EPDM.

I used the hdrpe for the first 9 years, and again when I expanded, getting one larger liner. The old one was in great condition and I used it for re-lining my bog v1 and mini stream.. For most applications, you don't need the underlay. If you have sharp edges anywhere or roots you're worried about, then use the underlay but if you go to the hdrpe site, they'll state exactly as I have above. Most peeps go for the EPDM as it's more an industry standard but I like the much better cost and since it's lighter, better shipping rate + easier to move by myself. A negative re hdrpe is that you'll have more issue with folds and how to hide them than with EPDM. But with EPDM, you DO need the underlay. If you research, you'll see HDRPE is harder to puncture/tear, so it's a worthy alternate to EPDM.

Spot on!
Folding the corners is really not that bad with HDRPE. It's just like gift wrapping! @kelpie: It may be tough to find hdrpe in the UK at any weight, but I believe it is typically sold in 30 mil thickness.

Whatever you do, I would heed the advice of members here, verify the material you are purchasing (EPDM or HDRPE) and its thickness, and disregard warranties as they are mostly marketing (at least in The US) and few, if any, material warranties will cover the labor to uninstall/reinstall which is most of the time/cost of the work.

When I was much younger, I bought some deck stain that came with a 10 year warranty. Sanded my deck for days to prep it and applied exactly as instructed. Stain failed 1 year later. When I called about the warranty, they apologized and were happy to send me a few new cans of stain. The rep kind of laughed at me when I asked, "What about the 2 weekends worth of sanding I have to do again?"

That was a hard lesson to learn. Can you imagine rocking your whole pond in and then needing to replace the liner after a few years?