Splitting

Plain-English definition

Splitting occurs when the natural fibres of a piece of wood are forced apart, creating a crack that runs parallel to the grain.

Why it matters

Wood is highly vulnerable to splitting when mechanical pressure is applied, particularly near the ends or edges of a board where there is less surrounding material to hold the fibres together. Driving a thick screw or nail directly into wood acts exactly like an axe wedge, pushing the fibres apart until the board cracks entirely.

Common mistake

A common mistake is skipping the preparation step of drilling a pilot hole. Beginners often try to drive a screw directly into a delicate piece of wood to save time, resulting in a severe split that ruins the workpiece and requires starting over. Always drill a pilot hole first, especially when screwing close to the edge.