Water-impermeable edging for a skinned door with a peripheral frame of timber-based material

A door leaf comprises a rigid frame 9 supporting a pair of outer skins 8, with a central foam core 11 there between, the frame being made of a timber-based material and having at one or more of its exposed edges an edging layer 10 made from a substantially water-impermeable material such as MDF (medium density fibreboard), PVC, or polystyrene. The edging layer improves the appearance of the door leaf at its exposed edges and helps to protect the frame from the ingress of moisture, without unduly compromising structural strength or ease of working. In a prefered embodiment, the frame corners are mitred with a clearance between the mitre and the corner of the frame to allow for the trimming of the door.