How To Create a Cement Countertop

Measure the dimensions of the upper exposed section of the cabinet counter. Add 1 1/2 inches to each side for overhang and record. Cut melamine-coated particleboard to the recorded dimensions using a jigsaw. This board forms the base of the cement form.

Cut two identical plywood planks to the recorded length and two identical planks to the width. Apply glue to the ends of the plywood planks and join these together to create a rectangular frame for the melamine board. Reinforce the corners with nails inserted every 6 inches using a brad nail gun.

Apply a bead of glue to the edges of the plywood frame. Center and lower it over the edges of the melamine board, pressing it lightly to help the glue adhere to the surface. Let the glue dry for the time specified in the label’s directions.

Apply lengths of masking tape along the inner edges of the form, spaced 3/16 inch from the corners. Use a caulk gun and silicone caulk to fill the gap between each edge of the board and tape with clear caulk. Smooth the caulk with a wet finger and quickly remove the tape. The caulk seals tiny gaps in the form to prevent cement leaks.

Cut a piece of diamond lath mesh several inches smaller than the base of the melamine-coated particleboard so it fits snugly inside. Use aviation snips to cut the mesh.

Mix quick-dry cement with water in a bucket using a hoe. Follow label directions for the mixing instructions to keep the cement from turning out too hard or too runny. Set the form on a solid surface.

Pour the prepared cement around the edges of the form to distribute it evenly throughout. Continue to pour the cement into the form until its base is covered. Work the cement into the corners with your gloved hands before pouring more cement until the form is two-thirds full.

Lower the diamond lath mesh onto the cement in the form and continue to pour cement until the form is completely full. Smooth the surface of the cement and let it cure.

Insert a plastic putty knife into the long and short sides of the form to loosen the cement countertop. Tap the base of the mold to release the cement countertop. Secure the countertop over the cabinet with masonry cement.