There are several methods, the most thorough of which is to replace the door and frame as a unit, and this is what insurance would usually pay for due to difficulties with half-measures. You might try replacing the portion that splintered by using good joinery techniques to fit in a new section of frame, adding such shims and metal reinforcement plates as might fit the particular situation. (Plates are available at retail for the door itself which wrap around the door at the lock area, for example, or serve as a strong strike plate on the frame). Door and frame ratings for fire and smoke cannot be maintained without replacing the unit to the best of my knowledge and experience.
From servicing and maintenance through to installation and replacement we’re with you for the entire life cycle of your door, keeping your business moving. We invest heavily in the training of our engineers and we share our knowledge and ideas, so that our expertise is second to none. We provide you with options and we can replace as well as maintain and repair. We listen, we adapt and we constantly seek out ways to improve our service.
Boarding Up Nottingham