Flush Panel Doors can be used internally or externally. Doors have lock blocks on both sides to allow hanging from either side, and feature extra wide top rails for strength and versatility. Internal frames are KD (Kiln dried) Hardwood, Finger Jointed Pine or MDF (Medium Density Fibreboard). We can also include Steel Reinforcement inside the doors that are above 2400 x 1200 for extra rigidity from bowing and warping, grooves for all sliding door track requirements and prime painting are available.