Name one key environmental factor that affects insulation performance in outdoor applications.

Temperature fluctuations are a key environmental factor that influences insulation performance in outdoor applications. Insulation materials are designed to resist heat transfer, helping to keep buildings warm in colder conditions and cool in hotter conditions. However, when there are significant temperature changes—such as between day and night or seasonal variations—this can affect the overall efficiency of the insulation.

Extreme temperature differences can lead to thermal bridging, where heat escapes or enters through areas of poor insulation. Additionally, materials can expand or contract due to temperature changes, which may lead to cracks or gaps, further reducing their effectiveness. This fluctuation can also influence the moisture levels within the insulation, affecting its overall performance.

While humidity levels, air pressure, and wind speed do impact insulation in various ways, it is the fluctuations in temperature that are most critical to maintaining consistent insulation performance in changing outdoor environments.