When homeowners and contractors begin planning a wall renovation, one of the first specific questions that arises is, what thickness does shiplap come in? The answer is not as simple as a single number, as this material is available in a range of dimensions to suit different aesthetic goals and structural requirements. Understanding the standard dimensions, the difference between real and nominal thickness, and the specific options for planks and boards is essential for selecting the right product for your project.
Standard Thickness Ranges for Shiplap
The most common question regarding shiplap dimensions revolves around standard thickness. For interior residential applications, the industry standard thickness is typically 11/16 inches, which is approximately 17.5 millimeters. This specific measurement is popular because it provides a substantial, high-end visual presence on the wall without being excessively bulky. You will also frequently encounter 3/4-inch shiplap, which is often considered the "true" dimensional lumber size, offering a thicker, more commanding profile that is favored for exterior applications or specific design statements.
1x Board vs. True Dimensional Thickness
To navigate shiplap thickness specifications, it is crucial to understand the difference between "1x" boards and actual measurements. When labeled as 1x shiplap, this refers to lumber that was originally cut from a log to a rough size of one inch thick. Through the process of planning and smoothing the surfaces for sale, the final manufactured thickness is reduced. Consequently, a piece labeled as 1x4 will actually measure 3/4 inch thick, and a 1x6 will typically be 11/16 inch. Always check the specific product specifications rather than relying solely on the label name to ensure you are getting the intended depth for your design.
Material Type Influences Dimension
The composition of the shiplap plays a significant role in the available thicknesses. Wood shiplap, whether made from pine, cedar, or reclaimed barn wood, adheres closely to the standard measurements mentioned above. However, when you move to fiber cement shiplap or engineered wood products, the dimensions can vary slightly. These alternative materials are engineered for stability and resistance to moisture, and they are often found in a consistent 11/16-inch profile, providing a reliable, uniform look regardless of the underlying wall conditions.
| Material Type | Common Thickness | Best Use Case |
|---|---|---|
| Knotty Pine Wood | 11/16 inch | Interior accent walls |
| Cedar Wood | 3/4 inch | Exterior cladding |
| Fiber Cement | 11/16 inch | High-moisture areas |
Vertical vs. Horizontal Orientation
While the thickness of the board remains consistent, the orientation of the shiplap can influence the visual weight of the wall. When planks are installed vertically, the 11/16-inch thickness creates a tall, slender line that can make a ceiling appear higher. Conversely, horizontal installation emphasizes the width of the board, and the 3/4-inch thickness provides a more robust, horizontal shelf-like aesthetic. The choice between these orientations does not change the metric of thickness, but it does dramatically impact the final visual texture.
Width Variations and Joint Design
While the question "what thickness does shiplap come in" is primary, it is equally important to consider width. Shiplap is most commonly found in widths of 4 inches, 5 inches, 6 inches, and 7 inches. The thickness of the board will interact with the width to define the shadow line, or the groove, between planks. A thicker board will generally create a deeper, more pronounced shadow line, adding greater dimension to the wall. Standard shiplap features a rabbet joint on the top and bottom edges, and the consistency of the thickness ensures that these joints align perfectly row after row during installation.
Specialty and Custom Options
For designers seeking a specific look, thickness can be customized, though this often comes at a premium. Some manufacturers offer shiplap milled to 5/8 inch or even 1/2 inch for a more minimalist, nearly flush appearance against the wall. This reduced thickness is less common in traditional lumber shiplap but is sometimes found in composite materials designed to mimic the look with a thinner profile. If you are working with a historic home restoration, you might seek out true 1-inch thick boards to match the original construction, which requires sourcing reclaimed lumber or custom milling.
