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Replacing a pond liner with a waterproof render?

A client has asked us to overhaul water feature that's past its best days. Personally, I'd rather fill it in and then hard(or soft) landscape over it, but 'beauty is in the eye of the beholder' and all that.

It has an exisiting liner that is leaking, should I stick to using a liner, maybe something made for purpose like a box welded liner, or could I use a waterproof render, applied over the internal brickwork?

They have said they want to have fish again so my concerns are that chemicals may leach out from any render and harm the fish.

Cheers for any feedback.
Sam.

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  • I love rendered concrete ponds, they are neater, you can jump in and clean the out without the worry of puncturing. The concern over chemicals wont be a problem, as you would need to seal the pond once it has cured anyway. HOWEVER, the problem with the rendering option is that it is only as good as the brickwork/concrete you are attaching it to and for this reason, I would go for a liner replacement.

  • I also like render for the above reasons but i would only use it on something i had built.

  • Thanks Colin, Simon.

    The pond structure in question does actually have some visible cracks in the face-brickwork, so I guess it could be unwise to render it and expect it is a 100% sound structure..

    Any advice on a semi-flexible render(if that exists), or a suitable pond liner please?

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