Myth: “Laminated” or “Slab” panels are inferior to urethane because they are glued to the skins to hold the panel together. Therefore, these types of panels are not considered as durable and are thought to come loose within a short period of time.
Truth: For over 40 years walk-ins have been manufactured by either gluing insulation to metal skins (laminated) or pouring urethane (foamed-in-place) between two metal skins. Contrary to most beliefs, both systems provide equal performance in adhesion if applied correctly. This is important because in walk-ins the structural strength of the unit is dependent on this adhesion performance. When metal skins are glued or foamed to insulation a composite panel is created. This created panel performs much like a steel I-beam. I-beams by design are very strong for their weight and are used in building structures that need a lot of strength without the weight, such as skyscrapers. A steel I-beam is two flanges of steel connected and separated by a center steel web. In a walk-in panel, the two flanges are light gauge metal skins and the web is the foam insulation. All I-beams lose their strength if the flanges separate from the web. If the I-beams separate, skyscrapers would collapse. This is similar to walk-ins that could fail if the skins separate from the foam insulation.