Areas of Application

Installation over concrete subfloors

Floor application for wedi Building Board

All wedi Building Board sizes and thicknesses can be used as tile underlayments over concrete subfloors. Modified thinset mortar, combed through with a minimum 1/4” x 1/4” notch trowel, will then provide a ribbed bed into which the wedi Building Boards will be laid. All joints should be staggered so that no seam continues throughout the length of the floor. Apply weights (i.e. tile boxes) onto the surface and where transitions are located while the mortar is setting up. After the mortar has set, wedi alkali resistant fiberglass mesh tape, or wedi Sealing Tape or wedi 610 Adhesive Sealant should be applied to all seams, then tiling can begin.

Step 1 Make sure the concrete floor is fully cured and free of debris, oil or waxes. Some concrete floors might require priming or vapor retarders prior to thinset mortar installation.

Step 2

The boards are installed in a full coverage setting bed using modified thinset mortar allowing best connection between subfloor and wedi board.

Step 3

Stagger all joints when laying wedi Building Boards on the floor. Apply some weights such as tile boxes equally distributed over the wedi board surface.