![]() ![]() ![]() The lamination process bonds a “pre-cured” and shaped polyiso panel board between two steel or aluminum panels. Even though these are minute they can have some influence on solar heat gain in certain applications contexts. In this process the core is curing while it’s between the panels, which may create tiny air spaces. The foamed in place process is preferred for higher volume projects requiring many consistent width panels and less factory customization. IMP’s are manufactured using either of two processes: “lamination” or “foamed in place.” The foamed in place process injects foam between the two sheets of metal and bonds to the metal skins via a chemical reaction as it fills up the interior portion of the panel. Some of the most familiar applications for IMPs include cold storage buildings, office and convention centers in extreme climates, sports complexes, food processing plants, new manufacturing facilities and utility buildings. With the highest R-value per inch of any common insulation material, it’s ideal to create a rigid board product. Polyiso is one of the most energy efficient insulating materials used in commercial building due to its dense closed cell cell composition. The majority of insulated metal panels are made with polyisocyanurate (polyiso) cores due to the superior insulating properties of polyiso and its ease to manufacture. Misalignments, creases, or buckles on the panel’s face will lead to failing panels, requiring a new product or second installation.The CSI Master Format describes roofing and siding IMPs as “a wall or roof assembly composed of an insulated polyisocyanurate core material sandwiched between two cold rolled pre-coated steel skins, utilizing an interlocking joint for a weather tight vapor barrier and insulating system.” The definition broadens slightly as IMP manufacturers offer options such as rock wool, puf, or polyurethane cores, with enhanced fire retardant properties and other unique applications.
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