Timber, widely used in construction and furniture making, is a versatile and natural material that can be prone to various defects. These defects, which can occur during the growing, harvesting, seasoning, or usage stages, can significantly impact the quality, strength, and durability of the timber. Understanding these defects is crucial for ensuring the timber’s suitability for its intended purpose. One common defect in timber is knots, which are formed when branches are present in the tree trunk. These knots can vary in size and shape, and their presence can weaken the structural integrity of the timber. If the knots are large, they may reduce the timber’s strength and cause it to be more susceptible to cracking or splitting. In some cases, they may also make the timber more difficult to work with, as they can interfere with the smoothness of the wood surface and the cutting process. Another defect often observed is warping, which occurs when the wood changes shape due to uneven drying or exposure to moisture. The three main types of warping are twisting, bowing, and cupping. Twisting refers to the