Why Canberra roofs age the way they do
Canberra is hard on roofs in a way coastal cities aren't. The real enemy here is the freeze-thaw cycle: water seeps into old, rigid pointing mortar, freezes overnight, expands and cracks it open β winter after winter until the ridge caps are loose and leaking. Add baking summers that bleach the tile coating, the occasional savage hailstorm, and the leaf litter from Canberra's mature canopy, and a 40-year-old tile roof has usually lost the surface seal it was built with. Restoration rebuilds that seal.
