What nail size is typically used to attach strip-wood flooring to the sub-floor?

The typical size used to attach strip-wood flooring to the sub-floor is in the 7d to 8d range. This size is ideal for several reasons. First, nails in this size category provide sufficient length and holding power to securely fasten the flooring to the sub-floor without risking damage to the wood or compromising its structure.

When attaching strip-wood flooring, the nails need to be long enough to penetrate the sub-floor adequately while also being thin enough to avoid splitting the wood. The 7d to 8d nails strike this balance well, making them the preferred choice for this application. They also help in maintaining the overall integrity and aesthetic finish of the flooring installation, allowing for a smooth and even appearance once the flooring is laid down and finished.

Other nail sizes, while they may be suitable for different applications, do not provide the same combination of strength and safety for fastening wood strip flooring. Therefore, the use of 7d to 8d cut nails is established as standard practice in the flooring industry.