Hi
New to the pond world, and already frustrated. I think it is my own fault though.
Here is the situation.
I had a concrete wall poured in a rectangle on flat ground, 10'x20' 6" tall and 6" think, there is a lip on top of this that protrudes 1.5" in either direction, so the cross section of the wall looks like a "T". In the middle of this rectangle I had the concrete contractor pour a 3'x8' monolith, plumbed so that water can flow out of the top of it. I then put 2" to 3" of sand on the bottom of the pond rectangle and purchased a EPDM liner. I planned on fastening the liner to the wall just below the lip with Bituthane by Grace, (this is a waterproofing self healing tape of sorts) I meticulously installed this make sure that it was sealed against the liner and the concrete. After filling the pond to check for leaks, I noticed that it was loosing about an 1"/hr. (120 gallons). so I drained the pond and discovered that gapping had formed and the Bituthane was releasing off of the concrete. (despite the application of the surface conditioner) So I purchased a 5 gallon bucket of Henry's waterproofing tar for roofs and again meticulously applied this to all joints both between the EPDM and the Bituthane and the Bituthane and the concrete. Filled the pond again and was loosing about 1/4"/hr. (30 gallons). I once again drained the pond, and cannot find any voids or areas where it can be leaking. I need ideas or products that I might try to resolve this leaking. I am not sure if I should resort of hot mopping the pond, ripping everything out and using Gunite, or if there is a product that can be used to seal the EPDM to the edge of the concrete.
Sorry this is so long, Thanks for any help.
New to the pond world, and already frustrated. I think it is my own fault though.
Here is the situation.
I had a concrete wall poured in a rectangle on flat ground, 10'x20' 6" tall and 6" think, there is a lip on top of this that protrudes 1.5" in either direction, so the cross section of the wall looks like a "T". In the middle of this rectangle I had the concrete contractor pour a 3'x8' monolith, plumbed so that water can flow out of the top of it. I then put 2" to 3" of sand on the bottom of the pond rectangle and purchased a EPDM liner. I planned on fastening the liner to the wall just below the lip with Bituthane by Grace, (this is a waterproofing self healing tape of sorts) I meticulously installed this make sure that it was sealed against the liner and the concrete. After filling the pond to check for leaks, I noticed that it was loosing about an 1"/hr. (120 gallons). so I drained the pond and discovered that gapping had formed and the Bituthane was releasing off of the concrete. (despite the application of the surface conditioner) So I purchased a 5 gallon bucket of Henry's waterproofing tar for roofs and again meticulously applied this to all joints both between the EPDM and the Bituthane and the Bituthane and the concrete. Filled the pond again and was loosing about 1/4"/hr. (30 gallons). I once again drained the pond, and cannot find any voids or areas where it can be leaking. I need ideas or products that I might try to resolve this leaking. I am not sure if I should resort of hot mopping the pond, ripping everything out and using Gunite, or if there is a product that can be used to seal the EPDM to the edge of the concrete.
Sorry this is so long, Thanks for any help.