Flat trim moulding is part of our extensive trim selection, and the basic design of this moulding offers many possibilities when it comes to enriching walls, windows, furniture, and more. Flat trim moulding is easy to work. It is also pre-primed and a great choice for projects that require faux finishing. Flat trim moulding is crafted in urethane. Urethane millwork is increasingly popular and often chosen for its high-performance characteristics. Flat trim moulding is non-porous. Low moisture absorbency prevents the warping, cracking, peeling, mildew and decay that can lead to frequent maintenance.