A fire door only does its job if it’s fitted correctly, so it must be installed by a competent installer who follows the instructions in full.
This guide from Door-Stop sets out the materials needed, the checks to make before starting, how to fit the doorset and any toplight, how to seal the gap between the frame and wall, and the final checks once it’s in place.
It’s written for installers, but it’s helpful if you’d like to understand what a proper installation involves.
