How to line a pond without removing large boulders

[GregoryK60]

Hi!
New member and new to the pond life. I’m digging out a 5x8 pond between a few existing boulders. Help!!
The small rocks are for visual purposes only for now.
Can I adhere the liner to the big boys and secure per “ usual” in the other areas? I was thinking that I could place thin flagstone vertically below waterline on the big boulders for securing.

 

[Tombstone]

I wouldn't, very hard to seal.

 

[brokensword]

as long as the boulders are smooth and there's no sharp edges, you might get away with a liner but you'll be pulling it up and over the boulders. I'm assuming that you don't want to have to dig the boulders out. You'll have to get creative re hiding the liner at the surface if the boulders exist at this height. I'd suggest going a bit higher and then you can create a shelf for hiding the liner as per usual. @addy1 forum 'how to hide the edge' drawing should be inserted here. When she comes along, I'm sure she'll tack it on for your perusal.

 

[j.w]

@GregoryK60

I got the idea they wanted the top of the boulders sticking up out of the water and the liner just halfway or so up the rocks. Not sure tho.

 

[addy1]

The only way I can think it out is to have the liner up as high as you want it, have the edge showing ie the liner above the water. The pond water just below ow it will leak.
You could try sealants but not sure how well they would work with rocks.
Or you could pay to have a company use sealant for the dirt and rocks to make a pond. Like a pool.

Welcome to our forum!

 

[GBBUDD]

They have sprays very similar to rhino liner very strong and durable sticks to just about anything but i wouldn't be willing to gamble on that seem BETWEEN THE SPRAY AND surface of the water below the water line . sealing to rock within a pond and having that seam under water in not advisable. but make it a few inches above and you stand a good chance.

 

[GregoryK60]

View attachment 135832@GregoryK60

I got the idea they wanted the top of the boulders sticking up out of the water and the liner just halfway or so up the rocks. Not sure tho.

Yep, that's what I was thinking. I decided on a workaround. My first (non electric) frog pond on a budget. Probably give a solar bubbler a try)

 

[GregoryK60]

View attachment 135832@GregoryK60

I got the idea they wanted the top of the boulders sticking up out of the water and the liner just halfway or so up the rocks. Not sure tho.

Yes, exactly my plan!

 

[TJeep_1999]

Yep, that's what I was thinking. I decided on a workaround. My first (non electric) frog pond on a budget. Probably give a solar bubbler a try)

Looks good!

 

[combatwombat]

Welcome. Looks good! Is that digging bar the $25 bugger from Harbor Freight? I think I have the same one. It's very handy for persuading large, heavy boulders to move where you want them.