MDF door and window casings are a great, affordable choice for framing. Made from wood fibers and resin, MDF has a smooth surface that’s perfect for painting. It’s best for indoor use, as too much moisture can cause it to swell or warp. For areas with a lot of moisture, we recommend using our waterproof moulding options. MDF is durable and provides a clean, polished look for your doors and windows without the high price of wood or urethane.