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.

Carpenters are trained to take on a wide range of home projects. You can hire a carpenter to do framing, roofing, build custom furniture, and make significant upgrades to your home. General carpenters are usually able to handle most jobs. However, you may also choose to hire a carpenter who specializes in a specific type of carpentry. 

Balcony construction or replacement typically requires a building permit from your local permitting authority. Safety and building integrity are the main reasons for the need to obtain a permit and the subsequent inspections. In some cases, especially cantilevered balconies, your municipality may also require the oversight and signature of a structural engineer.

In framing, studs are placed at 16-inch intervals to coincide with the typical spacing of wall materials such as drywall or plywood. This spacing is called "on-center" and is necessary for maintaining structural stability and efficient use of materials. The 16-inch spacing also helps to distribute the weight evenly across the building's structure. For those looking to cut material costs and improve energy efficiency, 24-inch stud spacing can be employed through a method called "advanced framing". This requires careful planning and adherence to local building codes to ensure structural integrity.