anchoring rocks

[doobry]

thanks a bunch ,that stuff sounds like a bargain only 100 sterling pounds a tin .eerrr NO i think
here it is

 

[doobry]

oops seems that my link doesent work anymore,100 pound a tin any cheaper alternatives or ideas?

 

[addy1]

heres the problem rocks by day how would expanding foam hold this View attachment 119870

lay a rock on the edge rock then more rocks on that rock

 

[Sparky]

Great stuff pond foam is an adhesive but UV is hell on it. Good for holding stuff in place but not a structural bond. I like your idea of “pinning” the rocks as I have done the same thing in other circumstances and it worked great.

 

[Lisak1]

Great stuff pond foam is an adhesive but UV is hell on it.

That was my point earlier - it's not going to hold anything with any kind of weight for long and it does begin to dry out and lose integrity in the sun. In my opinion, a pond edge needs to be built so that it doesn't require "glue" to hold it together, because when it fails, you'll end up with a rock or possibly even a human in the pond.