The practice of ‘knocking up’a door frame on site or in a workshop, hanging a door and believing that the result constituted a valid fire door installation was never correct.
Door frames should be purchased from the door manufacture, or from a company licensed to manufacture them or via a BWF Approved Fire Door Centre.
60 minute fire doors – Frames should be made of hardwood with a density greater than 650 kg/m3
30 minute fire doors– frames or linings can be made of softwood, with a minimum density of 450 kg/m3 (or to match the density and frame dimensions given in the manufacturers’ installation instructions)
You should check the suitability of different timber species for doorframes with the door manufacturer, since some materials such as Ash are NOT RECOMMENDED by many door manufacturers.
