Fresco
Applying lime based paint onto wet lime plaster.
Decorating skill needed to produce a good finish.
Frog
An indentation within a brick which reduces weight.
The frog face of the brick is normally laid face up for maximum strength.
Galvanised Steel
Galvanised steel is where steelwork is dipped coated with zinc.
See: Galvanised process: https://www.galvanizing.org.uk/galvanizing-process/
Gargoyles
In architecture, a formed grotesque fixture with a spout designed to convey water from a roof and away from the side of a building, thereby preventing it from running down masonry walls and eroding the mortar.
Garnet Paper
As glass paper but with a more hard wearing abrasive surface which produces a smoother wood finish then standard glass paper
glass.