What is the recommended angle for blind nailing during strip flooring installation?

The recommended angle for blind nailing during strip flooring installation is 45 degrees. This angle allows for the nail to be driven through the tongue of the flooring strip into the subfloor, effectively providing a secure hold while keeping the nail hidden from view. The 45-degree angle strikes a balance between providing adequate holding power and preventing the risk of splitting the flooring material, which might occur at steeper angles. This technique is especially important for ensuring that the flooring remains level and intact as it expands and contracts with changes in humidity and temperature.

While other angles listed, such as 30, 40, or 60 degrees, may not secure the flooring as effectively or may pose a risk for damaging the integrity of the wood, 45 degrees is established as the best practice for achieving a clean, durable installation.