Attaching the liner on the side of a boulder

[WOODMAN]

I need to install my liner 2 ft up the side of a 2 ton boulder. How do I adhere it and hide it so it looks natural?

 

[Mmathis]

Do you have any pictures that would show us more what you are talking about?

 

[Meyer Jordan]

I am not touching this one.

 

[sissy]

lift boulder out of the way put liner in then put boulder back .only way

 

[Mmathis]

lift boulder out of the way put liner in then put boulder back .only way

LOL, he'd need Addy's Kubota!

I am not touching this one.

Yep, we definitely need pictures, and a better idea of the overall plan. @WOODMAN, hoping you're not a troll or a robot......this does sound like a challenge!

 

[IPA]

If I needed to find a solution I would find a rubberized material that could be painted onto the bolder with a firm hold and bond the liner to that, clamp it with some ratchet clamps and figure out a better way to do it when or if that fails.

 

[sissy]

They used a rubberized insulation material on my basement walls and then a rubberized protector over that that keeps it from cracking from exposure above the ground .They used the same product on this old house ,but I am sure has been improved since 2004 .It was expensive but well worth it .I think on this old house they used it between the old foundation and the new foundation of the basement

 

[Waterbug]

I use a concrete drill and either epoxy bolts/screws or anchor bolts to attach pressure treated wood, or strips of plastic wood deck to the boulders a bit above water line. You can also use thin (1/8-1/4") plastic plant bed border and us several layers. Easier to bend.

I lay the layer, fill with water to make sure the liner is settled, and then use lathe screws to attach the liner down vertically into the top of the wood. There's no pressure, or at least shouldn't be, pulling down on the liner so the screws are just to keep the liner from flopping over. This also means the wood doesn't have to be continuous, so you can use short pieces.

Just epoxying wood to the rock is problematic because stuff can grow between the rock and epoxy making it weak. Bolts will hold even if the epoxy loses adhesion.

To hide... I mortar rock into the bottom of the pond and up the sides. The rock can go above the water line but for this type of application I generally make fake rock at the top. Just easier to get something that looks like the boulder and doesn't bump out too much.

You can make rock that just hangs on the wood/liner but imo for this type of application it's difficult and could fail. Rocking the entire bottom and up the side provides a foundation for the top cap.

I would strongly recommend not using any rubberized liquid product although I know these types of things are right up there with duct tape as a cure all for most DIYers. Rubberized products require an extremely stable subsurface and even then they can be trouble. Painting this stuff on the boulder, sure, great, very stable. Things go south when the rubber has bridge from the rock to what? Liner, over dirt? Doesn't work.

 

[Usman]

ye i cant get how u mean but in some cases u can sandwitch liner between 2 rocks to keep it on place , like add liner then place another 2 ft big boulder inside pond , liner will b between 2 rocks intact . u can use additional adhesive or seal too