Installing cedar siding can transform the exterior of your home, adding a timeless aesthetic and natural warmth that is difficult to replicate with other materials. This guide is designed to walk you through the entire process, from the initial preparation to the final finishing touches, ensuring a professional-looking result. Whether you are a seasoned DIY enthusiast or a homeowner tackling a new project, understanding the correct methodology is essential for a durable and beautiful finish that will protect your home for years.
Planning Your Cedar Siding Project
Before a single board is lifted, careful planning is required to ensure a smooth installation. You must first determine the specific type of cedar you will use, as choices between Western Red Cedar and Eastern White Cedar will affect workability and cost. It is also critical to calculate the exact square footage of your exterior walls, adding an extra 10% for waste and cuts to avoid delays mid-project. Gathering all necessary tools—from a reliable table saw or circular saw to specialized siding nails and a chalk line—will keep you efficient and prevent frustrating stops in the middle of the job.
Preparing the Wall Surface
The substrate beneath your cedar siding must be clean, flat, and structurally sound to prevent future issues. Begin by removing any old siding, nails, or debris, and inspect the sheathing for any signs of rot or damage that need immediate attention. Installing a water-resistive barrier, such as house wrap or tar paper, is a crucial step that creates a moisture barrier between the sheathing and the cedar. This layer protects the wall cavity from rain intrusion while allowing any trapped moisture to escape, significantly extending the life of your siding.
Insulation and Air Barrier Considerations
For optimal energy efficiency, consider adding a layer of rigid foam insulation over the water-resistive barrier. This not only helps regulate the temperature inside your home but also provides a flatter surface for the siding to adhere to. When installing continuous insulation, be sure to seal all joints with tape to maintain an effective air barrier. This prevents air leakage around windows, doors, and corners, which can lead to higher energy bills and uncomfortable drafts inside the house.
Layout and Cutting
Proper layout is the key to achieving a straight and symmetrical finish, so take your time with this stage. Start by establishing a chalk line for the first course of siding, ensuring it is perfectly level to serve as a guide for the rows above. When cutting your cedar boards to length, remember to account for the "reveal"—the small gap between boards—to maintain the classic shadow line appearance. Using a sharp blade and supporting the cut carefully will prevent the natural fibers from splintering, ensuring clean, professional edges.
Installing the Starter Course
The first course of siding, often called the starter course, sets the foundation for the entire installation and must be installed with precision. This course is typically installed upside down compared to standard courses, with the bottom edge of the board resting on the foundation or sill plate. This technique prevents water from driving the nails back through the holes and directs moisture away from the critical joint where the wall meets the ground. Ensure these initial boards are secured tightly but without bending, using corrosion-resistant nails driven into the studs for maximum holding power.
Cladding the Walls
With the starter course in place, you can move on to installing the full-height panels that form the visible surface of your home. Begin at one corner and work your way horizontally, staggering the vertical joints between rows to create a stable and visually appealing pattern. It is vital to maintain consistent spacing between boards, usually dictated by the size of the siding, to allow for natural expansion and contraction. As you progress upward, always use a level to check for alignment and adjust the placement of nails to hit the structural framing behind the sheathing for stability.
Managing Corners and Trim
Corners and edges require special attention to complete the installation neatly and securely. For inside corners, installing a "return"—a flat strip of cedar that covers the exposed edge of the adjacent panel—creates a clean, finished look. For outside corners, carefully measure and cut boards to ensure a tight fit without gaps. Installing pre-manufactured corner boards can simplify this process, providing a durable and aesthetically pleasing edge that protects the vulnerable ends of the siding from moisture damage and impact.
Finishing and Long-Term Care
Once all the boards are securely nailed in place, the final step involves addressing the hardware and preparing the siding for its protective finish. It is recommended to countersink all nails slightly below the surface of the wood to prevent moisture from collecting on the heads. Before applying any stain or sealant, allow the cedar to acclimate and dry slightly, especially if it was installed during wet weather. Applying a high-quality semi-transparent stain is highly recommended, as it protects the wood from UV degradation and insect intrusion while allowing the natural grain and beauty of the cedar to show through.