First fix
First fix is normally considered to be after the shell of the building has been completed. Following this it involves Joinery and building work to roof, internal walls, floors and ceiling inserting all cables for electrical supply along with pipework for water supply before plastering. 
Fitch Brushes
Long handled brushes with either flat, round or slant heads for fine detailed painting.
Flame Cleaning
Removal of mill scale and rust by the use of a hot flame during the preparation of steel work. (Oxy-acetylene burner).
Method of Removing mill scale and old paint coatings from steelwork.Flame Retardant
Flame retarding paints and coatings are designed to restrict the spread of fire across a substrate.
Flame Spread
Defined in British Standards 476 part 7 which relates to the distance a flame will spread over a surface,