I am reading a book about building ponds and they say there are two styles : rigid and flexible liner ponds. My question is is it about hte material you use to cover the surface or the line of the pond (geometric, natural) ? I am not native English speaking so i don't understand exactly what they mean
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Like they all say above, a lot use the rigid, which is a preformed pond. Preformed by a machine, of different sizes and shapes. The hole is dug to the size of the preformed i.e. rigid pond. You do not have any flexibility in the shape of the pond it must match the rigid liner.
With a flexible liner pond you can make it to the size and shape you want. It can be in a formal shape like a box, rectangle, circle, or more natural edges not straight lines, small at one end, large at the other, like nature tends to make ponds.
For a flexible liner pond you dig a hole to the size and shape you want them buy the liner to fit the hole. The liner can be pvc, ppl, epdm The ppl and epdm will work better and last longer than the pvc. The thickness of the liner is important, most use 40 plus mls
Hope this helps