ShadowDeck™ 100mm Butt-Joint Biscuit

Level Joints. Stronger Connections.

Achieve a perfectly flush, professional finish at every butt-joint with the ShadowDeck™ 100mm Butt-Joint Biscuit. Working in conjunction with the ShadowDeck™ T-Shaped Fastener, this biscuit ensures your decking boards and picture frame boards sit at exactly the same height — while adding significant structural strength to the joint.

No more misaligned boards or weak connections at the joins. The Butt-Joint Biscuit slots neatly into place, locking everything together for a deck that looks great and stands the test of time.

Key Features

• Ensures level board height — keeps decking and picture frame boards perfectly flush at butt-joints
• Adds structural strength — reinforces the joint for a more durable, long-lasting deck
• 100mm length — sized to span the joint effectively across the joist
• Works with the ShadowDeck™ T-Shaped Fastener — designed to complement the full ShadowDeck™ hidden fastener system
• Hidden installation — maintains the clean, nail-free surface finish

When to Use It

Use the Butt-Joint Biscuit wherever decking boards meet picture frame boards end-to-end. Paired with the ShadowDeck™ T-Shaped Fastener, it creates a joint that is both visually seamless and structurally sound. Refer to our Installation Guide for full picture framing and butt-joint instructions.

Compatible With

ShadowDeck™ T-Shaped Fastener, pre-grooved Kwila decking timber, and the full ShadowDeck™ fastener range.