Building envelope

  1. Air Leakage Control

    Air leakage can increase your HVAC costs, encourage growth of mold and mildew, degrade insulation performance, and even cause structural damage to your building. This article discusses the causes and sources of air leakage, and explains what you can do to stop it.

  2. Cool Roofs

    Minimizing rooftop heat gain using a light-colored “cool” roof can be a cost-effective and low-risk way to reduce cooling loads and peak demand. Learn more about the different options available.

  3. Insulation

    Insulation is an essential part of any building, reducing heating and cooling loads and fostering a comfortable environment. This article explains how insulation is rated, the differences between commonly used insulation materials, and how to make the best choices.

  4. Insulation Primer

    Insulation is a vitally important part of any building. Not only does it save money by reducing heating and cooling loads, but also is a key factor in creating a comfortable environment. This article explains which materials have the highest insulating value, and how to verify insulation levels.

  5. Reducing Cooling Loads: A Window Point of View

    Windows have a large influence on cooling loads. Learn how you can use glazing, window films, and shading to realize significant reductions in HVAC energy use.

  6. Window Film

    Window films are thin, transparent sheets that can reduce cooling loads, improve shatter resistance, block up to 99 percent of ultraviolet radiation, and reduce glare. This article describes the different options available, and explains how to make the best choice.

  7. Windows

    Windows have a tremendous impact on heating and cooling loads as well as ambient light levels. In both new and retrofit situations, high-performance windows can cut annual energy costs by up to 20 percent. This article explains how to select the best windows for your building.