Goods in transit are liable to move about a little. It’s entirely natural and impossible to prevent, be it movement in the factory, on a delivery vehicle or the fitters installing the window.
Not surprisingly then, sometimes balance springs can slip off the “shoe”, designed to hold the balance and sash together. Detached balances generally mean a service call is required, which we seek to avoid.
That’s why the balances on every Masterframe sash window are held firmly in place with a retaining clip, that once snapped into position locks the balance in place for life.
You will never need a service engineer and we won’t have a service call to make.