* For most standard 1/4" beadboard: Use 1" to 1 1/4" (3d to 4d) finishing nails.
Here are some additional factors to consider:
* Substrate material:
* Wood studs: The recommendations above are perfect.
* Plywood: Generally use the same size as wood studs.
* Drywall: If nailing through drywall into a stud behind it, make sure the nail is long enough to penetrate at least 1 inch into the stud itself. You might need to go longer, like a 1 1/2" nail.
* Beadboard thickness: Thicker beadboard might require slightly longer nails for better holding power.
* Nail gun: If using a nail gun, follow the manufacturer's recommendations for nail size.
* Test: It's always a good idea to do a test nail in an inconspicuous area. This will help you determine if the nail length is appropriate and if it's causing any splitting or damage to the beadboard.
Important Considerations:
* Predrill: Predrilling pilot holes can help prevent splitting, especially near edges or with harder woods.
* Nail placement: Place nails strategically in the grooves or along the edges of the beadboard where they will be less visible.
* Countersink: Countersink the nails slightly so you can fill the holes with wood filler for a smooth, professional finish.