How long should a drywall nail be for 1/2" thick drywall?

When installing 1/2" thick drywall, the recommended nail length is 1-1/4 inches. This length is suitable because it provides sufficient penetration into the underlying framing members, ensuring a secure attachment.

Using a nail that is 1-1/4 inches long allows for enough grip within the stud or framing material while minimizing the risk of damaging the drywall surface. The additional 3/4 inch beyond the thickness of the drywall helps to ensure the nail securely anchors into the wood or metal studs.

Selecting a nail that is too short may not provide adequate holding strength, which could result in the drywall becoming loose over time. Conversely, using a nail that is too long could penetrate too deeply, potentially causing damage to the material it’s being attached to or causing issues like structural compromise. This makes 1-1/4 inches the optimal choice for properly securing 1/2" drywall.