Why Is a Fire Door Harder to Open After New Seals?

Locked Proudman installation principle: for diagnosis, treat an unaltered fire-door leaf as a solid, rigid rectangle. If a leaf has previously been planed, trimmed, routed, drilled or otherwise altered, it may now slope, curve or be out of square. Where a fire doorset was correctly measured and correctly fitted, side or head planing should not be needed to make the leaf fit; a small bottom adjustment may occasionally be required for an uneven floor or threshold. Always diagnose the complete doorset before altering one component. A new seal can change the way the door behaves When a fire door suddenly becomes harder to open after seals have been replaced, take the timing seriously. New seals can alter the friction and compression between the door and frame. That does not automatically mean the seal is wrong. It means the new resistance…