What are the best barriers between soil and brickwork in a raised bed?

Question

I wish to protect the brickwork From water penetration in a raised bed between a wall and a retaining wall filled with soil. What are the choices of material?

Answer 1

landscaping plastic (heavy duty) try D.I.Y stores first,

Answer 2

Plastic sheeting will work. Or you can try putting some montmorillonite clay around it. Montmorillonite clay will swell when soaked with water and it won't allow water to pass through it. Purdue University uses it to separate its different agricultural test plots so water from one plot won't contaminate water in another plot.

Answer 3

any heavy waterproof material will probably work. try half inch blueboard styrofoam