New and need some help

[Bbeaman]

Hi,
I’m new here and love this site. I am adding a second pond to existing pond by a stream. Too have the fish go to one pond to the next could I cement over stream liner and two and over 2 overlapped sections of both ponds to have a secure seal. Your suggestions would be greatly appreciated

Bryan

 

[Lisak1]

Welcome to the GPF!

Is your question can you seam two pieces of liner together? The answer to that is yes. I just don't know what you mean by "cement" over it.

 

[Bbeaman]

Welcome to the GPF!

Is your question can you seam two pieces of liner together? The answer to that is yes. I just don't know what you mean by "cement" over it.

So the stream connecting the two ponds would be underlayment, liner and on top of that would be cement. I don’t trust myself with just seaming

 

[addy1]

Welcome to the forum! Or buy a piece of liner that will cover both ponds and a stream all in one piece.

 

[Lisak1]

But cement isn't waterproof, so you're still relying on the liner ultimately to retain the water. @GBBUDD did a thread here about seaming a liner. It's a tedious process, but it's not difficult If you follow the steps. Make sure the liner is clean, dry and flat.

Here it is:

Seaming EPDM liner

Seaming is not difficult but it does require some foresight and thought. Hopefully this list will help you to create a seam that will last for many, many years, issue free. If you can seam your liners in a driveway or somewhere flat that is by far your best option. The method below is how I...

www.gardenpondforum.com

 

[j.w]

@Bbeaman

 

[poconojoe]

I wouldn't add cement over the liner. That will be a complete mess and as @Lisak1 said, cement is not waterproof, so it won't accomplish anything.

You can seam liners, but it's a very specific procedure. You need the correct tape, primer and glue that matches the material your liner is made of. It all has to be hospital clean without any wrinkles.
That being said, we recommend using 45 mil EPDM for the liner and the matching non-woven underlayment.
DO NOT USE A PVC LINER. It will fail within months.

 

[Bbeaman]

Thank you so much

 

[Bbeaman]

View attachment 140987@Bbeaman

Thank you

I wouldn't add cement over the liner. That will be a complete mess and as @Lisak1 said, cement is not waterproof, so it won't accomplish anything.

You can seam liners, but it's a very specific procedure. You need the correct tape, primer and glue that matches the material your liner is made of. It all has to be hospital clean without any wrinkles.
That being said, we recommend using 45 mil EPDM for the liner and the matching non-woven underlayment.
DO NOT USE A PVC LINER. It will fail within months.

I appreciate it

 

[GBBUDD]

There is a company that installs epdm and then concretes over the epdm but trust me that is not an easy option by any means if you do to thin a layer of concrete it will just crack and become 100's of sharp liner cutters.
My first suggestion is to is read over the post @Lisak1 should you give it a read over then go watch the you tube videos not the internet is loaded with the new and old videos as well as videos from someone who just did there fist seam and things may have gone well but it's the test of time that is the ultimate goal. Now the BEST PART OF SEAMING RUBER IS YOU CAN SEAM FRON AND BACK . and you can even do a double seam tape at each seam so if one fails there should be another seam behind it that has never seen any water and the new clock can start at that point'. As mentioned having a clean surface is key and don't get creative and use ajax soft scrub or something as it probably leaves a film and your primers and tape will fail.
The other very important part id do not stretch the rubber. If you try and make it fit an area by stretching it your seam will fail down the road.
The other is the glues/ primers that i have ever used are more a contact cement as its called you apply it and let if dry to the touch and once you start laying the tape the second the two touch it's home and it its not right you need to start over. once the seam is done you can even take another piece of rubber and place it over the seam and make two new seams to protect that seam you just made. in other words it's pretty hard to fail if your not confident in what you did seam over it.

 

[Lisak1]

If you watch Aquascape videos they will occasionally show how to seam a liner. They will admit that they get creative sometimes and it leads to coming up a bit short on liner. Here's a recent one where they show a seam, but they've done others where they showed the process in even greater detail: