Wedi Board vs Cement Board? Choosing the right substrate for your mosaic is critical to its longevity. A mosaic that may get wet should be on a moisture resistant or waterproof backer. Read how to choose the right one for your project!
Wedi Board Wedi board (pronounced weedy) is an ideal substrate for mosaic artists. It consists of styrofoam encased in mesh and cement. This sturdy material is very lightweight and cuts easily with a utility knife (no need for any power tools!). Wedi Panels are about ¼ of the weight of Durock and other cement boards, and ½ the weight of MDF or birch plywood.