10 Best Insulations For Metal Buildings 2026 in the United States

The Owens Corning 703 Rigid Fiberglass Board is a semi-rigid fiberglass insulation product that comes in a pack of twelve 24" x 48" x 1" boards. Designed for use in construction and industrial settings, it offers a decent R-Value of 4.3, which is effective for reducing heat transfer and lowering operating costs in metal buildings. The boards are made of fiberglass and are certified to contain an average of 53% recycled glass content, making them an environmentally conscious choice.

Installation can be relatively straightforward due to the board's rigidity and manageable size, yet its 36-pound weight may require some effort during handling and placement. One of the standout features is its excellent soundproofing capability, with a Noise Reduction Coefficient (NRC) of 0.7, making it suitable for environments where noise control is important, such as professional studios and certain industrial applications. Additionally, the product has a Class A or Class 1 fire rating per ASTM E84, ensuring it meets high safety standards.

It's worth noting that these boards are unfaced, meaning they lack a moisture barrier, which could be a drawback in extremely humid conditions without additional protective measures. The product's dimensions cover 8 square feet per board, which should be taken into account when calculating the total area needed for larger projects. The Owens Corning 703 offers solid thermal and acoustic performance with high safety ratings, though it requires attention to moisture management in specific environments.

The INSULATION MARKETPLACE SmartSHIELD -3mm 48inx25ft Reflective Insulation roll stands out in several key areas for metal building insulation. It is highly effective at reflecting 95% of radiant energy, making it an excellent radiant barrier. The material used is a 3mm closed cell polyethylene foam, which is robust, non-toxic, and non-allergenic, ensuring safety during installation and use. This foam core is sandwiched between engineered foil, enhancing its durability and reflective properties.

With a vapor barrier feature, it remains unaffected by humidity and moisture, making it suitable for both indoor and outdoor applications. This is particularly beneficial for metal buildings which are often exposed to varying weather conditions. Additionally, it offers soundproofing capabilities, effectively blocking sound waves, thus contributing to a quieter indoor environment. The installation process is straightforward as the product is easy to cut and handle, and its lightweight nature helps in managing large coverage areas.

One potential drawback is the relatively low thickness of 3mm, which may not provide as high of an R-value as thicker insulation options. This could mean that while it is excellent for radiant heat reflection, it might be less effective in extreme temperature scenarios compared to other, thicker insulation materials. Furthermore, the product’s dimensions cover 625 square feet, which is suitable for moderate-sized projects but may require multiple rolls for larger buildings. In summary, this insulation is well-suited for users needing a versatile, easy-to-install, and moisture-resistant solution for metal buildings, though it might need supplementation for peak thermal insulation in more extreme conditions.

The Owens Corning 705 High Strength Rigid Fiberglass Board is a robust option for thermal and acoustic insulation, particularly in metal buildings. Each 2-inch thick board has a strong R-Value of 8.7, making it effective in reducing heat transfer and potentially lowering heating and cooling costs. The material, fiberglass, is known for its excellent insulation properties, and the product boasts a Noise Reduction Coefficient (NRC) of 1.05, offering superior sound absorption—ideal for professional studios or any setting where noise reduction is important.

It is also fire rated as Class A or Class 1 per ASTM E84, which ensures high safety standards against fire hazards. Additionally, the boards contain an average of 53% recycled glass content, which is a plus for eco-conscious buyers. The product does not explicitly mention moisture resistance, an important factor for metal buildings that may be prone to condensation and humidity issues. The installation is unfaced, meaning it does not include a vapor barrier, which could be a drawback in damp environments.

The product's weight and size are manageable for most users, but handling and installation might require some effort due to the rigidity and thickness of the boards.