Aluminum siding _______ easily, so many manufacturers offer a thin backerboard of insulation that fits behind each panel.

Aluminum siding is known to dent easily upon impact, making it one of its notable characteristics. This susceptibility to dents is a significant factor that leads many manufacturers to provide an insulating backerboard that can be installed behind the panels. The backerboard not only provides insulation but also helps to absorb some of the impact that can cause denting, thus enhancing the durability and performance of the siding. The presence of the backerboard can also improve the overall energy efficiency of the home by providing an additional insulating layer.

In contrast, while aluminum siding may experience issues like fading or warping over time due to exposure to weather elements, the primary concern that necessitates the backerboard is its propensity to dent. Cracking is not typically an issue associated with aluminum siding, as it is a metal material that tends to bend rather than crack under stress. This distinction helps underscore why the focus on denting is crucial when considering the longevity and maintenance of aluminum siding.