Alpine’s IMB-V5 is a normal service door with Insulated Metal Backed slats that are 5/8 inch thick slats with an R-Value: 6.82 (U-factor of 0.147)
calculated using the ASHRAE Handbook of Fundamentals.The slats are insulated with polystyrene for increased thermal protection. The IMB-V5 profile is also available with foamed-in-place polyurethane insulation. The IMB-V5 profile is a flat slat with a back cover, and come in a variety of materials and finishes.