Red Seal Lather (Interior Systems Mechanic) Practice Exam

What is the purpose of furring strips in lathing?

1. To provide structural support

2. To create a level surface for attaching finishes

3. To insulate walls from temperature changes

4. To decorate the wall surface

The correct answer is: To create a level surface for attaching finishes

Furring strips play an essential role in creating a level surface for attaching finishes, which is critical in the process of interior lathing and finishing. When installing drywall or other wall finishes, surfaces may not be perfectly flat or even. The furring strips are applied to create a uniform plane onto which the finishes can be securely fastened. This ensures that the finished surface appears smooth and professional, minimizing issues like warping or misalignment that can occur if the finishes are applied directly to an uneven wall. While furring strips can contribute to overall wall insulation in some contexts, their primary function is not insulation but rather leveling and supporting finishes. They do not serve a decorative purpose and are not primarily intended to provide structural support in the way that foundational elements would. Thus, the correct understanding of furring strips emphasizes their role in ensuring that wall finishes are installed correctly and look aesthetically pleasing.