What is fir out the wall?

Firring out a wall involves adding thin strips of wood, typically fir, to the existing surface in order to create a level and uniform finish. This process is often used in situations where the existing wall is uneven or where a new surface needs to be attached to the wall. Firring out a wall is also commonly used in renovations where a thicker layer of insulation is added to the existing wall, as the firring allows for the necessary depth and improves the overall energy efficiency of the space. Additionally, the use of fir as a framing material provides strength and durability, making it an ideal choice for this construction technique.