Can Fiberglass Insulation Touch Metal Panels?

Fiberglass insulation can cut your metal building’s energy bills considerably, potentially saving you tens of thousands of dollars over the life of your structure. When properly installed, fiberglass insulation prevents heat from entering or escaping your building, depending on time of year, creating a more comfortable, soundproof environment in addition to saving you big money. It also helps prevent condensation, which can lead to costly problems and health concerns.

Many of our customers contact us with questions regarding the best installation techniques for fiberglass insulation. One of the most common questions they ask is whether the insulation should physically touch the building’s steel panels once installed.

A Common Practice

In a word, yes! It is common practice for the fiberglass insulation to directly touch the steel panels of your metal building. The bare fiberglass touches the metal, itself, where it absorbs temperature change and slows the flow of air. In hot temperatures, the insulation helps prevent hot air from penetrating your steel building, while in colder temperatures, it helps keep heated air inside. In fact, if the fiberglass does not touch the metal panel an airspace is created, giving condensation a place to form. So, it is always best practice for the fiberglass to touch the panel directly, eliminating the condensation gap.

The Vapor Retarder

Typically, the opposite side of your steel building’s insulation (the side that faces the building’s interior) is lined with a vapor retarder that helps keep it from “sweating,” or producing condensation. Condensation can impact thermal performance, and it can also lead to a host of other problems, including leaks, discoloration and bad odors. The vapor retarder serves as an important line of defense against condensation, creating a healthier, safer and more structurally secure environment.

Insulation, when properly installed, plays a big role in keeping your steel building comfortable, dry and safe for use. By following recommended installation procedures, you can create a stable, clean and energy-efficient space your family or business can utilize for generations to come.