A major part of French door installation is getting the doors straight and even. This is where many do-it-yourselfers go wrong, and the function of the doors is ultimately compromised. Hiring an experienced contractor to install new French doors is the easiest way to get a quality installation. For homeowners who insist on tackling this project on their own, it's essential to learn how to use shims properly for leveling.

Using Shims in French Door Installation

Shims are tapered pieces of wood that are inserted between the door frame and door opening to adjust the positioning of the frame during installation. Once the pre-hung French doors are tilted into the opening, they should be temporarily secured with a few 3-inch drywall screws. With a hammer, shims should then be carefully tapped into the space between the door opening and the door frame directly behind the top hinges on both side jambs.

Use a level and carpenter's square to evaluate the evenness of the gaps along the top of the French doors and between the two. To adjust these gaps, insert shims beneath the threshold or sill of the frame accordingly. When level, shim at the center and bottom hinges and secure with drywall screws through the shims into the frame. This is similar to the process for leveling sliding glass door frames, but the swinging doors make it slightly more complicated.

Those looking for new French or sliding glass doors in the San Diego area should contact Brothers Home Improvement Inc. Windows and Doors at 800 672-3777. These contractors design, manufacture, sell and install a variety of patio doors.