High R-Value Insulation Systems
High R-Value systems are created by using 2 layers of fiberglass insulation. This can be achieved in a metal building in two ways; By using the Double Layer Banding System or the Energy Saving System. The double layers of insulation create high R-Values and give your building optimal energy performance. In addition to the double layers of insulation, thermal blocks can be used to achieve more thermal performance.
Double Layer Banding System
In new construction, banding is placed perpendicular to the purlins every 30" apart. Fiberglass blankets that have been laminated with a vapor barrier are placed between the purlins. The thickness or R-Value of the blankets are determined by the purlin depth, type of roof installed, and if there are thermal blocks present. A layer of unfaced fiberglass is then laid down over the top of the purlins before the metal roof panels are installed.
Energy Saver Systems
The energy saving system is similar to the double layer banding system. Two layers of unfaced fiberglass are used with a separate energy saving fabric that is held up with a network of steel bands run in both directions. The fabric has an excellent vapor retarder rating and completely conceals the secondary framing in the building. Once it is installed, two layers of fiberglass are installed before the exterior metal panels are screwed down. If installed properly, this system is tested and approved to be OSHA compliant for fall protection.
|Double Layer Insulation|
|6" and 3" R-29|
6" and 3.5" R-30
6" and 4" R-32
6" and 6" R-38
9.5" and 3" R-40
9.5" and 4" R-43
(generally top layer is unfaced)
Thermal blocks can be installed over the top of the purlins to create a barrier between the exterior panels and interior framing. These blocks can be added to the double layers of insulation to give additional R-Value to the building, particularly at the purlin, where the fiberglass is compressed. They can save the building owner thousands of dollars in energy costs.Learn More