What Screws Are Best For Subfloors?

Rather than nails,? screws ?are best to use for subfloors — these fasteners are convenient, easy to remove and capable of providing torque that nails lack. Because of their structure, screws can penetrate plywood more easily and improve the connection, whereas nails can weaken the plywood. The main categories of screws designed for subfloors include galvanized screws, steel screws and cement board screws.

Galvanized screws:?Galvanized screws are named for their manufacturing process, which gives these screws a special coating that protects them against deterioration and rust. A galvanized screw is durable and moisture resistant, so it’s great for installing chemical-treated lumber and for use on exterior flooring like deck floors or porch floors.

Steel screws:?Steel screws usually have a helical thread that spirals most of the way up the shaft. These screws are designed to keep plywood intact, minimize fiber damage and sustain lateral movement without snapping or warping. This durability, known as shear strength, is why steel screws are frequently used for interior subfloors.

Cement board screws:?Fully threaded screws like cement board screws are?designed to fasten subfloors?for tiling jobs. These screws have a coating for resisting corrosion that can be caused by mortar or moisture. Cement board screws can be used with wood or metal.

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