How to get a suitable liner size for your pond? Below is the basic formula.
Pond Liner Length=(Pond Length) + (2 x Pond Depth) + (2)
Pond Liner Width=(Pond Width) + (2 x Pond Depth) + (2)
For Example: A finished pond that is 10 long, 8 wide, and 5 deep;
Liner Length=(10) + (2 x 5) + (2) = 22
Liner Width= (8) + (2 x 5) + (2) = 20