What is the proper method for cutting insulation?

The method of cutting insulation to fit between joists and studs is considered proper because it ensures a snug fit, which is crucial for the effectiveness of the insulation. A snug fit minimizes air gaps, preventing energy loss and enhancing thermal performance. When insulation is cut to specifically fit the designated spaces between structural elements, it helps maintain the intended R-value and reduces the likelihood of drafts, which can compromise the overall energy efficiency of a building.

The other options may lead to less optimal insulation installation. Cutting to fit any dimension may result in pieces that are too large or too small, leading to gaps that can undermine insulation effectiveness. Creating overlaps can be counterproductive as it may inhibit airflow and can lead to improper sealing, while measuring and cutting uniformly, although it sounds practical, may not account for the varied dimensions of the framing or the spaces between joists and studs effectively. Therefore, the method of cutting insulation to fit snugly in its designated space is key to ensuring proper insulation performance.