What qualifications do I need to install a fire door?
Resizing a doorset is not something that should be done without first contacting the manufacturer. Most door designs rely on components being of a minimum size in order to perform in a fire. Lippings are particularly important on typical flush door leaves – removing 3 or 4 mm can in some instances halve the depth of a lipping which could have a detrimental effect on the fire performance
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