In construction, furring are thin strips of wood or other material to level or raise surfaces of another material 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.

What does furring a wood mean?

1 : a fur trimming or lining. 2a : the application of thin wood, brick, or metal to joists, studs, or walls to form a level surface (as for attaching wallboard) or an air space. b : the material used in this process.

What is furring of the tea kettle?

Definition of 'furred'

6. (of a pipe, kettle, etc) lined with hard lime or other salts deposited from water.