These are narrow pieces of wood, typically softwood, measuring approximately 1 inch by 2 inches in nominal dimensions, commonly utilized in construction and available for purchase at a large home improvement retailer. They serve as an intermediate layer between the structural elements of a building and the finished surface, providing a nailing base for drywall, paneling, or other coverings. For instance, these strips can be affixed to concrete walls to create a level surface for installing insulation and subsequent wall finishes.
The use of this lumber offers several advantages, including improved insulation, moisture management, and the creation of a level and plumb surface for finish work. Their relatively low cost and ease of installation contribute to their popularity in both residential and commercial projects. Historically, similar materials have been used in building construction for centuries to achieve desired aesthetic and functional outcomes; modern iterations provide standardized sizing and consistent quality.