Step 5

Do a test fit

• Unclamp the workpieces, then clean out any sawdust from the grooves using a toothpick.
• Push biscuits into all grooves, then dry fit the workpieces together.
• Inspect the joint closely to ensure it’s tight.

Robert Maxwell for Family Handyman

Step 6

Join pieces

• Take the pieces apart again and remove the biscuits.
• Drizzle a little wood glue into all grooves, then spread it around with a toothpick to coat the inner surfaces of each groove.

Robert Maxwell for Family Handyman

• Push a biscuit into each groove on one of the workpieces.
• Interlock the pieces, then clamp them together tightly.
• Allow the glue at least an hour to set before removing the clamps.

Robert Maxwell for Family Handyman

FAQ

Are biscuit joints strong?

The answer is a resounding yes, with a few considerations. Biscuit joints are excellent for aligning and reinforcing the edges of two boards. They provide additional gluing surface area, making it harder for the joined pieces to pull apart. However, the strength of a biscuit joint depends on factors like the quality of the jointer, the type of glue used, and the accuracy of the joint’s fit. While they may not be suitable for heavy structural applications, biscuit joints are incredibly reliable for many woodworking projects, offering stability and durability that make them a valuable addition to any woodworker’s toolkit.

Can you biscuit joint plywood?

Yes, you can absolutely use biscuit joints with plywood. In fact, plywood is a popular material for biscuit jointing due to its versatility and wide range of applications. When working with plywood, biscuit joints can help align the edges of the sheets precisely and provide additional strength to your joints. This is particularly handy when building cabinets, furniture, or other projects where a clean, flush surface is crucial. Just ensure you’re using the right-sized biscuits and a high-quality biscuit joiner for the job.

How far apart should biscuit joints be?

As a general guideline, for typical woodworking applications, placing biscuit joints about 6 to 8 inches apart is a common practice. However, this spacing can vary based on factors such as the type of wood, the size and weight of the pieces being joined, and the overall design of your project.

For larger or heavier pieces, you may want to decrease the spacing to provide additional support and stability. Conversely, for smaller or lighter projects, you could space them a bit farther apart. The key is to strike a balance that ensures a strong and secure bond while also maintaining the structural integrity of your workpiece. Always refer to your project plans and consider the specific demands of your woodworking project when determining the ideal spacing for biscuit joints.