Why Does a Fire Door Closer Struggle to Shut the Door?

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 weak-looking closer is not necessarily the problem When a closer struggles to shut a fire door, the easiest fix is also one of the most tempting: increase the power. Sometimes that is appropriate. But first find out what the closer is fighting against. The door, hinges, frame, seals, latch, lock strike plate, floor and…