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Your local building code will list all the framing requirements for whatever type of structure you're building. Most exterior walls require spacing of 16 inches on-center, while many non-load-bearing interior walls only require 24 inches of spacing. However, there are also varying requirements depending on your construction material, so checking your municipality's rules is essential.

Most of the time, you’ll want to use screws on your subfloor rather than nails. Nails can actually weaken plywood, whereas screws can easily penetrate without damage. They also form a more secure connection because of their shape, preventing squeaky floors and tightly holding the subfloor in place. That said, some contractors do prefer nails depending on the type of floor covering because they allow for more flexibility.

You can use a nail to find ceiling joists, but it’s not as reliable as a stud finder, and you’ll end up with lots of small holes in your ceiling. If the nail hits a joist, you'll feel increased resistance. Mark the spot with a pencil. Repeat this process regularly along the ceiling, 16 or 24 inches apart, until you've mapped out the joist locations.

When deciding whether to use nails or screws for framing, the specific needs of the project must be taken into account. Nails have long been the go-to option for framing due to their affordability, ease of installation, and ability to withstand shear forces. They are perfect for structural framing projects where fast assembly is essential. In contrast, screws offer exceptional holding power and are particularly useful in situations requiring increased strength and resistance to pull-out forces. For projects that prioritize accuracy and long-lasting quality, screws may be the preferred option, though nails remain a dependable and efficient choice.