When looking to restore a stone monument or structure that is aging and in need of repair, one must assess several key factors.
First and foremost is public safety. The sandstone soffit face shows that this is still quite a sizeable stone. In saying this, you can see the visible exfoliation underneath from water damage. The outermost edge also looks quite thin so in this case it would be wise to indent stone.
Other cases may not be so risky and you will be able to patch with mortar repair. You can expect a good lime-based mortar patch to last quite a long time. Obviously, just not as long as replacement with new stone.
Our next restoration project in Winchelsea, Victoria – an hour past Geelong. The bluestone cottage is approximately 150 years old (circa 1860) and is now used by a professional services company.
With ‘dressed’ pitched face bluestone, hammer dressed quoins and coursed random rubble, the front entrance is also adorned with a ‘celtic-themed’ centre/single pin arch; complete with springers, curved voussoirs and keystone.