If the original roof slates are in good condition, but slipping because of nail fatigue, we can salvage all good quality slates, making up numbers with similar slates.
This is a good alternative, especially if the property is a listed building.

Shown here are the before, during and after phases of a recent reroofing project

Fibre cement slate roof

Polyroof 185 Fibreglass Flat roof and natural Brazilian slate roof