Terne an alloy of lead and tin was applied over sheet iron then later steel.
Buildt in gutter repair.
The earliest metal used for the lining is terne plate.
Devonshire states the typical steps involved with a built in gutter restoration involve.
Patching holes repairing failed seams replacing or upgrading outlets and full membrane replacements.
Maintenance a majority of built in gutters are lined with formed metal.
Built in gutter systems like yankees and their close cousins box gutters require regular inspection and wood sealing to help maintain them but on the positive side they are less prone to clogs and obstructions.