In this guide we’ll look at the best pond liners for the UK market.
I’ve compared materials, durability, size and cost
to give you my top recommendations.
What is the Best Pond Liner?
In a rush? Here’s my top choice…
High-quality, UV-resistant liner PLUS free underlay!
This PondHero Pond Liner With Free Underlay is available in a range of sizes, suitable for medium to large ponds, and is easy to cut to size. The liner is thick, high quality and long lasting. Plus, it’s UV resistant so will stand the test of time! Free underlay comes included to extend the life of the liner.
Everything I Recommend
More Detailed Pond Liner Reviews
PondHero Pond Liner With Free Underlay Review
This PondHero Pond Liner With Free Underlay comes in a range of sizes and offers fantastic value for money.
The product comes with a matching amount of free underlay. This is essentially a weed resistant fabric which will help extend the life of your liner.
Both the liner and the underlay are really good quality which is great to see; sometimes companies can skimp when giving something away for free.
The pond liner has a UV-resistant coating to make it extra durable. It is impressively thick, especially at this price point, as well as easy to cut to size. It would be suitable for a medium sized pond.
Ideally, your pond should be lined with a layer of sand before using this product to get the maximum life.
If you’re looking for the best pond liner, which will also kit you out with an underlay, look no further than the PondHero Pond Liner With Free Underlay!
Certikin 2x3m PVC Pond Liner Review
This Certikin 2x3m PVC Pond Liner is great pond liner that’s made from thick, durable PVC.
The liner is thicker than most at 0.5 mm, making it tear resistant and protective against invasive roots.
The material is easier to handle with two people due to its weight, but this is basically a testament to the fact it has the thickness, strength and durability of a quality pond liner.
If you’re looking for a totally tear-proof PVC pond liner that won’t be messed with by roots, this is an extremely hardy option!
All Pond Solutions Pond Liner Review
This All Pond Solutions Pond Liner is a durable LDPE pond liner that is 0.3 mm thick and super strong.
The liner comes in a range of sizes and is easy to cut to size and weighs 200 g/ m².
This liner is reasonably straight forward to cut and lay. It isn’t hard to get it positioned smoothly for an attractive finish. It also comes with a free pond-building advice sheet!
If you’re looking for a simple-to-use liner that is flexible, strong, easy to lay and comes in a range of sizes, this is a really great choice!
Flexiliner 4x3m Pond Liner With Free Underlay Review
This Flexiliner 4x3m Pond Liner With Free Underlay is a super flexible liner that is thin and light, making it really easy for even one person to lay.
Thanks to how easy it is to use, it’s one of the best pond liners for more intricately shaped ponds, streams and waterfalls.
The liner is thin but tough and won’t be easily pierced by stones or roots. It comes with a good quality underlay, providing everything you need to get off to a great start with your pond.
The triple-layer liner has a core of hard-wearing LDPE. This has then been coated on both sides with a UV/rot-resistant laminate.
The inner weave makes the liner highly flexible – it’s easy to fold into difficult corners which is very helpful when making ponds.
If you’re looking for a strong and durable liner that is also flexible – easy to lay even in the most intricately shaped ponds, this is an excellent option to consider.
Polyex 5x4m Pond Liner Review
This Polyex 5x4m Pond Liner is a strong, durable and flexible pond liner.
The liner consists of a woven inner core, which keeps it flexible, sandwiched between two outer layers that are UV stabilised and rot resistant.
It is reversible – one side is black and the other brown.
If you’re in the market for a really heavy-duty liner that would be suitable for a larger pond, then the Polyex 5x4m Pond Liner is an absolute must have!
Things to Know Before Buying Pond Liner
If you are planning a pond, sourcing the best pond liner is essential. You want something that is tough and durable, but also light and flexible enough to create a nice shape and smooth finish.
Having done the hard work of digging out a pond, you certainly want to be sure that the liner you use will last many years. It definitely takes the enjoyment out of having created a lovely pond if it requires a lot of maintenance!
So, let’s make sure you get your pond finished off to a platinum standard. I’ve put together the following advice to ensure that, when it comes to finding the best pond liner, you know exactly what you’re looking for:
Flexible pond liners come in a range of materials. These include PVC (Polyvinylchloride), LDPE (Low Density Polyethylene), EPDM (Ethylene Propylene Diene Monomer) and Butyl Rubber.
These are all flexible and strong materials that will help you create a natural looking pond that will last for many years. However, these materials do have different qualities which are worth knowing about:
PVC liners are extremely flexible, they are one of the easiest linings to persuade into whatever shape you need them to adopt. The downside of PVC is that it may need more frequent replacing than other materials – possibly as much as every 4 – 5 years – and it can tear.
LDPE liners are extremely lightweight and therefore easy to position. They are tearproof; even if a hole is created in an LDPE liner, it will not ladder. Similarly to PVC liners, the downside of LDPE is that it is not quite as durable as thicker rubber liners.
Now the two rubber liner options:
EDPM liners (rubber) is the slightly cheaper option of the two rubber liners. It is entirely waterproof and has a high level of UV resistance.
Butyl Rubber liners are extremely popular pond liners. They are very strong and extremely durable – often guaranteed to last for over 25 years.
The downside of rubber liners (both EDPM and Butyl) is that they can be more difficult to work with as they are quite heavy. It may be more difficult to get them into position for this reason, and also they are not quite as flexible as non-rubber liners so aren’t as good for more-precise jobs.
When choosing the best pond liner for your pond, obviously durability is an important factor. However, the liner will only last many years if the preparation for your pond has been done well.
Always remove sharp stones that could pierce the liner and use an appropriate underlay to prevent roots from breaking through.
Underlay is really important to use under pond liner.
You shouldn’t skip this step – using an underlay will really extend the life of the pond liner.
Some pond liners will come with free underlay. This is great to look out for and will usually mean the underlay has been specially selected for use with that liner.
Why Use Underlay
- It stops stones or anything sharp making holes in the pond liner.
- Quality underlay will stop roots pushing through the liner. This is something that can create problems and cause holes in the liner over time.
- It stops the pond liner from stretching or changing shape too much. Some areas of the pond liner may become under more strain from the pond water, underlay will take some of the strain.
- Basically, using underlay extends the life of the pond liner.
How to Lay Underlay
- Underlay will generally come in strips. Matching the size of the pond liner is a good rule of thumb.
- If there are rougher areas of ground you may want to use 2, 3, or even 4 layers of underlay.
- Overlap the strips of underlay by approximately 10 cm.
- You may wish the keep the overlaps in place by using tape – you want to make sure that nothing moves around when the liner is placed on top as this might create lumps.
- Don’t cut the underlay until the pond liner has been positioned. This way you can make sure everywhere that is lined also has a layer of underlay.
The following formula will help you choose the right size liner for your pond:
Liner length = maximum excavation length + twice maximum depth + 1 m for overlap
Liner width = maximum excavation width + twice maximum depth + 1 m for overlap
Remember to measure the length and width at the longest and widest parts.
Also, remember to include enough liner for overlap when you make your purchase. The overlap provides extra material to cover any margin of error in calculations as well as for edging.
Butyl rubber pond liners are very hard-wearing and will last for an extremely long time. However, they are very thick and heavy and not as easy to work with as PVC liners. If you have a pond with smaller channels or a more intricate design, you might find that a rubber liner is too difficult to use. Also, rubber liners are toxic to some animals so may not be suitable for a Koi or wildlife pond.
No – tarpaulin is not waterproof. It’s a very water resistant material, but it will not stand the test of time as a pond liner. Your pond will leak and it will not be worth the effort. You’re better off using a pond liner made of PVC, LDPE, EDPM or Butyl rubber to make sure that your pond stays watertight for many years.
You should generally buy approximately 10% more underlay than the amount of pond liner you have purchased. You will want more if you are planning on using several layers of underlay. The extra 10% is to allow for overlapping as well as any overlay you may wish the use around the edge of the pond (where you may also put pond liner).