Furring
（重定向自Firring）
![Vertical, metal furring is applied to the wall to create a channel and receive the siding material.](/Images/godic/202501/13/Fachada_ventilada_lana_de_roca2657.JPG")
![A Furring "is performed by ripping off the planks, and putting second timbers upon the first timbers, and upon them again other planks. And all this is done to make a ship to bear a better sail" (Perrin 1929, 92).](/Images/godic/202501/13/Frame_Furring2657.png")
In construction, furring (furring strips) are thin strips of wood or other material to level or raise surfaces of another material such as to prevent dampness, to make space for insulation, or to level and resurface ceilings or walls. 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. Furring strips themselves are typically referred to as "battens" in the U.K. and sometimes the material is called "strapping" in the U.S.