How to Build a Custom Countertop

Preparation

• Sketch the kitchen layout on graph paper, including the locations and sizes of the cabinets. Double-check the measurements to ensure they are accurate. Check with your home store for their policy regarding measurements; while some will send a professional to measure the cabinets for you, others require you visit them with the dimensions.

Removal of Existing Countertop

• Remove any existing countertop, sink and plumbing from the top of the cabinet carefully. Check that the cabinets are level, or insert shims over low parts to support the countertop. Have the professionals cut the countertop for your cabinets according to the measurements provided.

Installation

• Set the countertop for an island cabinet directly above it. For an L- or U-shaped cabinet, glue the mitered edges of the corresponding edges of the two or three countertop pieces to secure them together. Insert miter or I-bolts into the gaps at the corners for additional security before setting them over the cabinet. Drill pilot holes through the corner braces of the cabinet that extend into the lower side of the countertop. Insert 1 1/4-inch screws into the holes to fasten the countertop in place.

Finishing Touches

• If you wish to install backsplashes for the countertops, set these snugly to the wall before laying the countertops. To ensure the backsplash fits tight and does not bulge, scribe a straight line along the top of the backsplash to ensure it is straight. Sand the backsplash at any point where the line curves out so it falls flush with the wall. Apply a bead of caulk between the back edge of the backsplash and the wall to seal the joint and prevent moisture from seeping through into the countertop.