Case study · Vape Shop Outlet, Coventry
How a floor spring ends up rusted solid in its box
A floor spring lives in the one place on a shopfront that gets the most water and the least attention: a steel box let into the floor directly under the threshold, covered by a plate that people walk over all day. Rain blown in off the street, mop water from the shop floor and the grit carried in on shoes all find their way under the plate. A well-fitted unit shrugs this off for years. One whose plate has lifted, or whose fixings have started to corrode, lets the water sit against the body, and from there it is a slow road to the state we found at Vape Shop Outlet: the spring rusted to its box, the mounting screws gone, and the cavity filled with a cake of corrosion and debris that had locked the whole thing in place.
From the shop’s side the symptoms were ordinary. The door had stopped closing properly and had begun to drop, so the leaf was catching and the lock was no longer lining up with its keep. That is the usual presentation of a dead floor spring, and it is normally a straightforward swap. The difference here was only visible once the cover plate was off.
Getting the old unit out
The door was lifted off its top pivot and the bottom rail freed from the spindle. Where a floor spring normally lifts out of its box on four screws, this one would not move; the body had to be cut and levered free in sections, and the photographs on this page show the state it was in when the last piece came out: the casting flaking, the spindle seized, the box behind it filled to the brim. The cavity was then cleared back to the steel of the box, scraped and dried, and checked for soundness. The box itself was intact, which meant the floor did not have to be broken out and the new unit could sit in the existing pocket on new fixings.
Fitting the new floor spring
With the box clean the job became a normal floor spring replacement. The new unit was bedded in the pocket and set level, the stainless cover plate laid flush with the tiles so it is not a trip at the top of the steps, and the door re-hung with its bottom rail on the new spindle and the top pivot checked and tightened. The closing speed and latching action were then set so the glass leaf swings shut under control and the lock meets its keep every time. The leaf, which had been dragging, now clears the threshold and the frame all the way round.
Work completed at Vape Shop Outlet, Coventry
- Diagnosis — glass entrance door not closing and dropping on its pivot; floor spring found rusted solid in its box with the fixings corroded away.
- Removal — door lifted off; old floor spring cut and levered out of the cavity in sections.
- Box — pocket cleared of rust, grit and debris back to sound steel, dried and checked; existing box reused.
- Replacement — new concealed floor spring bedded and levelled on new fixings; new stainless cover plate fitted flush with the tiled threshold.
- Re-hang — door re-hung on the new spindle, top pivot checked, closing and latching speeds set; lock and keep alignment confirmed.
- Trading — shop open throughout; customers routed through the open leaf while work was at the threshold.
Shop door and floor spring repairs across Coventry
Commercial Door Maintenance and Security Ltd repairs glass and aluminium shop doors across Coventry — the city-centre precincts, West Orchards, Cathedral Lanes and the retail parks — and the same floor spring, pivot and closer work for retail units across the West Midlands. If your door has started to drop or slam, a photograph of the threshold and the cover plate is usually enough for us to tell you what is under it and quote the same day. See our retail sector page for how we schedule work around trading hours.
