Sometimes accidents or long periods of time can weaken the joints which leads to movement in the lead, this can then cause cracks or breakages.
In some cases leaded light repairs are possible in situ but this might leave the surface with slight undulations.This is because the lead has to be gently folded back in order to replace the broken piece with a new piece of precision cut glass. The lead is then dressed back over the glass and sealed. The process slightly stretches the lead and creates a slight rippled effect.
A lot will depend on the condition of the lead. If we find the lead has become hard or brittle then the repairs are more difficult. Alternatively, if the lead is soft then a repair can usually be done quickly leaving little to no trace of the repair.
Whether we are repairing an existing window in situ or working on full window restoration, Guardian Glazing are committed to preserving the heritage of the windows. We always prefer to retain as much of the original glass as possible and that is something we are very proud of.