Wood is a natural material. It is important to understand its unique properties which should not be mistaken for flaws. Knots and Joint Lines: These are a natural property of all real wood furniture which can sometimes be visble through the painted/stained surface. This adds interest and does not affect the structural integrity of the piece.
Expansion and Contraction: All timber will display movement from season to season because of changes in temperature and humidity. This could effect, for example, the ease in which a drawer opens and closes, making it a little stiff. Also, give rise to timber joins expanding and contracting.