Furring

In construction, furring (furring strips) are strips of wood or other material applied to a structure to level or raise the surface, to prevent dampness, to make space for insulation, to level and resurface ceilings or walls,^[1] or to increase the beam of a wooden ship. Furring refers to the process of installing the strips and to the strips themselves. Firring is a U.K. term for wood strips which are usually 50 mm wide, tapered and fixed above wood roof joists to provide drainage falls below roof boarding.^{[citation needed]} Furring strips themselves are typically referred to as battens in the U.K. and sometimes the material is called strapping in the U.S.^{[citation needed]}