{"id":75038,"date":"2023-09-15T12:08:45","date_gmt":"2023-09-15T10:08:45","guid":{"rendered":"https:\/\/panelsandwich.org\/sandwich-panel-technical-information\/"},"modified":"2026-09-21T13:05:44","modified_gmt":"2026-09-21T11:05:44","slug":"sandwich-panel-technical-information","status":"publish","type":"page","link":"https:\/\/panelsandwich.org\/en\/sandwich-panel-technical-information\/","title":{"rendered":"Sandwich Panel Technical Information"},"content":{"rendered":"<div class=\"product\"><div class=\"product\">\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"75038\" class=\"elementor elementor-75038 elementor-24381\" data-elementor-post-type=\"page\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-75a561f3 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"75a561f3\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-1085b301\" data-id=\"1085b301\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-5ffb7f7f elementor-widget elementor-widget-text-editor\" data-id=\"5ffb7f7f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<div class=\"hero\"><div><p class=\"kicker\">TECHNICAL GUIDE \u2022 SANDWICH PANEL<\/p><h1>Sandwich Panel Technical Information<\/h1><p class=\"lead\">How a sandwich panel works, what its faces and core provide, how facade, roof, and cold storage solutions change, and what should be reviewed regarding insulation, airtightness, corrosion, fire, acoustics, durability, and recyclability.<\/p><p class=\"sub\">This V4 retains and reorganizes the historical technical content of the section but clearly separates general data from values that must be verified in the technical data sheet, DoP, tests, or classifications of the specific product.<\/p><div class=\"buttons\"><a class=\"a1\" href=\"#principios\">Start with the principles \u2193<\/a><a class=\"a2\" href=\"https:\/\/panelsandwich.org\/en\/sandwich-panel-technical-information\/02-raw-materials\/\">View raw materials \u2192<\/a><\/div><\/div><div class=\"heroimg\"><img decoding=\"async\" src=\"https:\/\/panelsandwich.org\/wp-content\/uploads\/2026\/02\/panel-fachada12.jpg\" alt=\"Facade sandwich panel during handling and installation\" title=\"\"><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-188847bb elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"188847bb\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-5b4e1193\" data-id=\"5b4e1193\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-33d6d1c0 elementor-widget elementor-widget-heading\" data-id=\"33d6d1c0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Technical Content of This Guide<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2eaca980 elementor-widget elementor-widget-text-editor\" data-id=\"2eaca980\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p style=\"margin:0;max-width:960px;\">Access the technical section you need directly. The main page summarizes the system&#8217;s behavior, and subpages develop each topic in more detail. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6b8fe6b4 elementor-widget elementor-widget-text-editor\" data-id=\"6b8fe6b4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<div class=\"navgrid\"><a href=\"#principios\">Sandwich panel principles<\/a><a href=\"#tipos\">Facade, roof, and refrigeration<\/a><a href=\"#requisitos\">Functional requirements<\/a><a href=\"#termica\">Heat, humidity, and airtightness<\/a><a href=\"#corrosion\">Corrosion and atmospheric agents<\/a><a href=\"#fuego\">Fire performance<\/a><a href=\"#acustica\">Acoustic insulation and absorption<\/a><a href=\"#sostenibilidad\">Energy, recycling, and environmental impact<\/a><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-5d615bca elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"5d615bca\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-1d89b36e\" data-id=\"1d89b36e\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-6df5e5c6 elementor-widget elementor-widget-heading\" data-id=\"6df5e5c6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Evolution and Usefulness of Sandwich Panels<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5785531a elementor-widget elementor-widget-text-editor\" data-id=\"5785531a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Composite panels or sandwich panels are used as external enclosures, partitions, facades, and roofs in industrial, commercial, and residential buildings. Their widespread use is explained by the combination of <strong>low weight, thermal insulation, and quick assembly<\/strong>, along with a wide variety of profiles, colors, coatings, hidden joints, and material combinations. <\/p><p>The original technical text for this section was written years ago: even then, it indicated that the system had been in use for over 30 years and presented the expansion of rock wool panels as an evolution from previous years. Today, rock wool is a consolidated family, especially when specific fire and\/or acoustic performance is sought. <\/p><div class=\"note\"><strong>Current approach:<\/strong> general information helps to understand the system but does not replace the declared performance of the product. Thicknesses, conductivity, Euroclass, fire resistance, admissible load, sheet metal, coating, and tolerances must be checked in the current documentation of the specific panel. <\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-4f97ec42 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"4f97ec42\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-6a1e3635\" data-id=\"6a1e3635\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-b5fb9c4 elementor-widget elementor-widget-heading\" data-id=\"b5fb9c4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Basic Principles of the Sandwich Panel<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7d83314b elementor-widget elementor-widget-text-editor\" data-id=\"7d83314b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>The basic configuration is always the same: <strong>two thin, resistant surfaces<\/strong> separated by a <strong>relatively thick and light core<\/strong>. The faces primarily handle stresses associated with bending, and the core maintains their separation, provides transverse rigidity, and transmits forces between them. <\/p><p>Combinations of steel or aluminum with PUR, PIR, mineral wool, or other cores allow the panel to be adjusted to the application. The final performance depends on the sum of faces, core, adhesion, joint, fixings, and connections. <\/p><div class=\"grid\"><div class=\"card\"><span class=\"tag\">EXTERNAL FACES<\/span><h3>What the Sheets Provide<\/h3><ul><li>Mechanical capacity and surface rigidity.<\/li><li>Protection of insulation against damage.<\/li><li>Protection against atmospheric agents.<\/li><li>Contribution to the vapor barrier when joints and connections are well resolved.<\/li><li>Architectural finish, color, and texture.<\/li><\/ul><\/div><div class=\"card\"><span class=\"tag\">CORE<\/span><h3>What the Insulation Provides<\/h3><ul><li>Thermal insulation.<\/li><li>Separation between faces and transmission of shear forces.<\/li><li>Contribution to acoustic performance.<\/li><li>Interior protection according to system configuration.<\/li><\/ul><\/div><div class=\"card\"><span class=\"tag\">COMPOSITE BOND<\/span><h3>How They Work Together<\/h3><p>The faces and core must act as a single unit throughout the service life. The bond can be achieved through foaming, adhesives\u2014common in mineral wool panels\u2014or mechanical solutions depending on the system. <\/p><\/div><\/div><div class=\"twogrid\"><div class=\"box good\"><h3>Technical Advantages of the System<\/h3><ul><li>High strength-to-weight ratio.<\/li><li>Continuous and durable thermal insulation when the system is correctly designed.<\/li><li>Good barrier against water and vapor depending on joints and seals.<\/li><li>High airtightness.<\/li><li>Resistance of faces to weathering and aggressive environments depending on the coating.<\/li><li>Fast installation, repair, or replacement.<\/li><li>Repeatable industrial production and contained maintenance.<\/li><li>Possibility of solutions with mineral wool for specific fire requirements.<\/li><\/ul><\/div><div class=\"box bad\"><h3>Limitations that Must Also Be Considered<\/h3><ul><li>Rigid foam cores are combustible; fire performance depends on the complete panel.<\/li><li>Differential deformation can occur when one face is intensely heated, for example, by solar radiation.<\/li><li>Foam cores may exhibit time-dependent deformation under load.<\/li><li>The thermal capacity of lightweight enclosures is low compared to massive solutions.<\/li><li>The acoustic insulation of a lightweight panel has limits inherent to low-mass constructions.<\/li><\/ul><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-36f81e60 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"36f81e60\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-6eb67f44\" data-id=\"6eb67f44\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-e8ac81c elementor-widget elementor-widget-heading\" data-id=\"e8ac81c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Facade, Roof, and Refrigeration Panels<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5767fa51 elementor-widget elementor-widget-text-editor\" data-id=\"5767fa51\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p style=\"max-width:980px;margin:0;\">The structural principle is common, but the geometry of the faces, joints, and fixings is adapted to the function of each enclosure.<\/p><div class=\"types\"><div class=\"type\"><img decoding=\"async\" src=\"https:\/\/panelsandwich.org\/wp-content\/uploads\/2026\/09\/01-panel-sandwich-fachada-liso-perfil-medidas.webp\" alt=\"Facade sandwich panel profile\" title=\"\"><div class=\"copy\"><h3>Facade Panels<\/h3><p>Metal faces are usually thin; the original technical content cites approximate typical thicknesses of <strong>0.4 to 0.7 mm<\/strong>. Light ribbing, striations, or micro-ribbing are used to improve surface rigidity, control flatness, and create architectural effects. <\/p><ul><li>Tongue-and-groove joints or equivalents aim for tight connections between panels.<\/li><li>Edges can be folded towards the core to limit thermal bridging between faces.<\/li><li>A compressed sealant in the joint can contribute to water and air tightness.<\/li><\/ul><\/div><\/div><div class=\"type\"><img decoding=\"async\" src=\"https:\/\/panelsandwich.org\/wp-content\/uploads\/2026\/09\/01-panel-sandwich-cubierta-3-grecas-perfil.webp\" alt=\"Profiled roof sandwich panel profile\" title=\"\"><div class=\"copy\"><h3>Roof Panels<\/h3><p>The geometry changes because during assembly and maintenance, human loads may exist, and in service, snow and rain loads. Therefore, the outer face is usually more profiled and may use sheet thicknesses greater than those for facades. <\/p><ul><li>Fixing with self-drilling or self-tapping screws depending on the system.<\/li><li>The historical text describes fixing through the high zone of the rib and also solutions in the low zone with sealing washers.<\/li><li>Self-closing joints with oblique geometry facilitate assembly and protection against moisture.<\/li><\/ul><\/div><\/div><div class=\"type\"><img decoding=\"async\" src=\"https:\/\/panelsandwich.org\/wp-content\/uploads\/2026\/09\/01-panel-sandwich-frigorifico-perfil-120-200.webp\" alt=\"Refrigeration sandwich panel profile\" title=\"\"><div class=\"copy\"><h3>Refrigeration Panels<\/h3><p>In cold rooms and warehouses, insulation thickness and joint continuity are especially critical. Connections must limit air and vapor entry and prevent thermal bridges. <\/p><ul><li>Thickness selection according to temperature and thermal design.<\/li><li>Joints with special attention to air, vapor, and water.<\/li><li>The original content describes the use of pre-formed sealants during assembly.<\/li><\/ul><\/div><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-63bae016 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"63bae016\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-549e51b1\" data-id=\"549e51b1\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-661f3316 elementor-widget elementor-widget-heading\" data-id=\"661f3316\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Functional requirements of the system<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-518d2fc elementor-widget elementor-widget-text-editor\" data-id=\"518d2fc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p style=\"max-width:980px;margin:0;\">Correct specification is a balance between safety, performance, durability, aesthetics, construction, and cost. There is no single configuration that maximizes all properties simultaneously. <\/p><div class=\"req\"><div class=\"r\"><h3>Security<\/h3><ul><li>Stability during manufacturing.<\/li><li>Transport and assembly.<\/li><li>In-service use.<\/li><li>Adequate fire performance.<\/li><\/ul><\/div><div class=\"r\"><h3>Performance<\/h3><ul><li>Resistance to water, snow, air, and dust.<\/li><li>Thermal insulation.<\/li><li>Condensation control.<\/li><li>Acoustic performance.<\/li><\/ul><\/div><div class=\"r\"><h3>Durability<\/h3><ul><li>Weather resistance.<\/li><li>Corrosive environments.<\/li><li>Insulation stability.<\/li><li>Adhesion durability.<\/li><\/ul><\/div><div class=\"r\"><h3>Aesthetics<\/h3><ul><li>Geometric tolerances.<\/li><li>Flatness and profiling.<\/li><li>Uniformity and color variation.<\/li><\/ul><\/div><div class=\"r\"><h3>Construction<\/h3><ul><li>Section suitable for the material.<\/li><li>Fast and repeatable joints.<\/li><li>Secure connections to the support.<\/li><li>Viable transport and handling.<\/li><\/ul><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-54299ac3 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"54299ac3\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-7b96b3ab\" data-id=\"7b96b3ab\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-4e052531 elementor-widget elementor-widget-heading\" data-id=\"4e052531\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Protection Against Heat, Humidity, and Leaks<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2e8de13d elementor-widget elementor-widget-text-editor\" data-id=\"2e8de13d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Thermal insulation is an essential part of the design of residential, industrial, public, and refrigeration buildings. In a real enclosure, the core value alone is not enough: infiltrations, joints, thermal bridges, and envelope continuity also play a role. <\/p><p>Metal faces and well-executed joints allow for an envelope with good air and water tightness. The historical content of the page indicated that adequate sealing systems could make the enclosure <strong>up to 100 times more airtight<\/strong> than certain modern reference enclosures. This data should be understood as a historical statement from the document and <strong>not as a universal value applicable to any current panel<\/strong>.  <\/p><p>When correctly installed, panels can help reduce leaks, improve comfort, and decrease energy losses in both summer and winter. This same airtightness necessitates proper <strong>ventilation<\/strong> design: a very airtight building requires controlled air renewal for health, safety, and hygrothermal control, especially in humid climates. <\/p><div class=\"technical\"><strong>Design point:<\/strong> for roofs and cold rooms, thickness, insulation continuity, seals, slope, connections, vapor barriers (where applicable), and condensation risk must be reviewed together.<\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-57b13336 elementor-widget elementor-widget-heading\" data-id=\"57b13336\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Historical Comparison of Thermal Insulation<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-11e201d1 elementor-widget elementor-widget-text-editor\" data-id=\"11e201d1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<div class=\"tablewrap\"><table><thead><tr><th>Material<\/th><th>Thickness shown in historical comparison for equivalent thermal performance<\/th><\/tr><\/thead><tbody><tr><td>Polyurethane foam<\/td><td>5 cm<\/td><\/tr><tr><td>Polystyrene<\/td><td>7.5 cm<\/td><\/tr><tr><td>Mineral wool<\/td><td>9 cm<\/td><\/tr><tr><td>Cork<\/td><td>10 cm<\/td><\/tr><tr><td>Chipboard \/ panel<\/td><td>13 cm<\/td><\/tr><tr><td>Wood planks<\/td><td>28 cm<\/td><\/tr><tr><td>Cement block<\/td><td>76 cm<\/td><\/tr><tr><td>Brick block<\/td><td>173 cm<\/td><\/tr><\/tbody><\/table><\/div><div class=\"note\"><strong>Important:<\/strong> this table comes from historical technical material and was based on average densities. It serves as a conceptual comparison, not as a current calculation tool. For insulation sizing, current conductivities and thermal resistances of specific products must be used.  <\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-3fa027b4 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"3fa027b4\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-5c476ff4\" data-id=\"5c476ff4\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-5e5481d4 elementor-widget elementor-widget-heading\" data-id=\"5e5481d4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Atmospheric Agents and Corrosion<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-486cbd2c elementor-widget elementor-widget-text-editor\" data-id=\"486cbd2c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Protection against weathering and corrosion determines service life and maintenance. The combination of metallic coating, pre-treatment, and organic paint must be compatible with the interior and exterior environment. <\/p><p>The historical text noted that the anti-corrosion protection of metal faces had evolved to allow very long service lives\u2014even exceeding one or two generations under favorable conditions. This should be interpreted as a general appreciation, not a guarantee of service life. <\/p><p>In marine environments or those with high salt concentration, the risk increases, and coating selection must be more demanding. The same applies to agricultural, industrial, or specific chemical agent installations. <\/p><p>Good practices for cutting, chip removal, damage repair, and metal compatibility are crucial to avoid compromising the protection system.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-552516a6 elementor-widget elementor-widget-text-editor\" data-id=\"552516a6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p style=\"margin-top:22px;\"><a href=\"https:\/\/panelsandwich.org\/en\/sandwich-panel-technical-information\/04-painting\/\">Learn more about paints and coatings \u2192<\/a>    <a href=\"https:\/\/panelsandwich.org\/en\/sandwich-panel-technical-information\/05-best-practices\/\">View best practices \u2192<\/a><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-8d1e248 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"8d1e248\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-557c96f2\" data-id=\"557c96f2\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-57ab934f elementor-widget elementor-widget-heading\" data-id=\"57ab934f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Fire Behavior<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6fc2e8fc elementor-widget elementor-widget-text-editor\" data-id=\"6fc2e8fc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<div class=\"grid\"><div class=\"card\"><p><span class=\"tag\">PUR \/ PIR<\/span><\/p><h3>Rigid foams<\/h3><p>These are combustible organic materials and can burn when exposed to a flame. However, the performance of the <strong>complete panel<\/strong> varies significantly with formulation, joint, faces, and configuration. <\/p><\/div><div class=\"card\"><p><span class=\"tag\">MINERAL WOOL<\/span><\/p><h3>Mineral core<\/h3><p>It is frequently used when the project prioritizes certain fire performance characteristics. Weight, thickness, thermal insulation, acoustics, and cost should also be considered. <\/p><\/div><div class=\"card\"><p><span class=\"tag\">CLASSIFICATION<\/span><\/p><h3>Do Not Confuse Concepts<\/h3><p>Reaction to fire and fire resistance are distinct performances. Classification must be taken from the tested system&#8217;s documentation and within its scope of application. <\/p><\/div><\/div><div class=\"note\"><strong>Important correction regarding historical language:<\/strong> it is not sufficient to say that a panel is \u201cfire resistant\u201d based on the core type. The Euroclass reaction must be checked, and when required by the project, the R\/E\/I resistance classification and the corresponding time of the complete system. <\/div><p><img decoding=\"async\" style=\"width: 100%; max-height: 430px; object-fit: cover; border-radius: 12px; margin-top: 8px;\" src=\"https:\/\/panelsandwich.org\/wp-content\/uploads\/2024\/08\/panel-lana-de-roca-con-fuego.jpg\" alt=\"Rock wool sandwich panel exposed to fire test or demonstration\" title=\"\"><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-640783af elementor-widget elementor-widget-text-editor\" data-id=\"640783af\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><a href=\"https:\/\/panelsandwich.org\/en\/sandwich-panel-technical-information\/09-fire-tests\/\">Open the complete fire guide \u2192<\/a><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-4e4079e1 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"4e4079e1\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-44a1b180\" data-id=\"44a1b180\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-35475cec elementor-widget elementor-widget-heading\" data-id=\"35475cec\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Acoustic Insulation and Absorption<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-400bbf0 elementor-widget elementor-widget-text-editor\" data-id=\"400bbf0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Sandwich panels are used in factories and workshops where noise levels can be high. A smooth, hard metal face reflects a large part of sound energy; therefore, a conventional enclosure may offer insulation between spaces but little absorption within the enclosure. <\/p><p>To improve the acoustic environment, sound-absorbing materials are used on walls or ceilings. Panels with a mineral wool core and a perforated face can combine <strong>absorption<\/strong> and <strong>sound transmission reduction<\/strong>, for example, in partitions where a continuous vapor barrier is not necessary or in machinery enclosures. <\/p><p>Reducing the reverberant level inside a factory can also help meet external noise targets. The original content illustrated this function with road acoustic barriers. <\/p><div class=\"twogrid\"><div class=\"box good\"><h3>Acoustic insulation<\/h3><p>Describes the reduction of sound transmission between two spaces. Depends on mass, rigidity, core, joints, gaps, and indirect transmissions. <\/p><\/div><div class=\"box bad\"><h3>Sound absorption<\/h3><p>Describes how much sound is absorbed within the enclosure instead of being reflected. A perforated face and an absorbent core can improve this function. <\/p><\/div><\/div><p><img decoding=\"async\" src=\"https:\/\/panelsandwich.org\/wp-content\/uploads\/2026\/08\/p_4_4_0_440-Panel-Sandwich-Lana-Roca-Acustico-Cubierta-REI-30120180.jpg\" alt=\"Rock wool acoustic sandwich panel for roofing\" style=\"width:100%;max-height:430px;object-fit:cover;border-radius:12px;margin-top:8px;\" title=\"\"><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-496ea9fb elementor-widget elementor-widget-text-editor\" data-id=\"496ea9fb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><a href=\"https:\/\/panelsandwich.org\/en\/sandwich-panel-technical-information\/10-acoustic-behavior\/\">Open the complete acoustics guide \u2192<\/a><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-751c0f7f elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"751c0f7f\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-252ee55a\" data-id=\"252ee55a\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-70bc14d7 elementor-widget elementor-widget-heading\" data-id=\"70bc14d7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Energy Saving, Recycling, and Environmental Impact<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4d736f4b elementor-widget elementor-widget-text-editor\" data-id=\"4d736f4b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>The original technical content highlighted three ways to reduce impact: <strong>thermal insulation during the building&#8217;s life<\/strong>, enclosure durability, and material recovery at the end of its useful life. It also noted that low weight can reduce resources and transport loads compared to more massive solutions. <\/p><p>Some of the numbers that appeared in the original documentation are historical and should not be presented today as universal values. We retain them here because they are part of the existing technical information, but with their context: <\/p><div class=\"hist\"><div class=\"h\"><strong>\u224834%<\/strong><span>The original text cited an approximate energy recovery equivalent to 34% of the total energy produced for thermal uses in certain foam recovery processes.<\/span><\/div><div class=\"h\"><strong>80\u201385%<\/strong><span>A 2003 study by aluminum manufacturers was cited, showing recovery rates for construction aluminum products of this order.<\/span><\/div><div class=\"h\"><strong>\u22485%<\/strong><span>The document indicated that producing aluminum from recycled material requires about 5% of the energy needed to produce primary aluminum from bauxite.<\/span><\/div><div class=\"h\"><strong>4 t<\/strong><span>It also cited an approximate saving of 4 tons of bauxite for every ton of recycled aluminum.<\/span><\/div><\/div><p>The document also noted that aluminum can be recycled repeatedly and that metal and foam can be recovered or valorized at the end of the panel&#8217;s life. For a current environmental assessment, EPD data, environmental declarations, actual recycling rates, and current end-of-life scenarios for the product and country must be used. <\/p><div class=\"note\"><strong>Another historical fact:<\/strong> the original page stated that the accumulated energy savings of a well-insulated enclosure could exceed at least twice the investment cost associated with the panels during their useful life. This is a statement dependent on climate, energy, building, and analysis period; it should not be turned into a generic economic promise. <\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-521db026 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"521db026\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-255389d\" data-id=\"255389d\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-1834415b elementor-widget elementor-widget-heading\" data-id=\"1834415b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Specific Technical Guides<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5160c3f2 elementor-widget elementor-widget-text-editor\" data-id=\"5160c3f2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p style=\"max-width:960px;margin:0;\">General information is expanded across nine subpages. Each must retain all original technical data for its subject, reorganized and contextualized. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2249bc92 elementor-widget elementor-widget-text-editor\" data-id=\"2249bc92\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<div class=\"subgrid\"><a href=\"https:\/\/panelsandwich.org\/en\/sandwich-panel-technical-information\/02-raw-materials\/\"><strong>Raw materials<\/strong><span>Steel, aluminum, PUR, PIR, mineral wool, adhesives, and coatings.<\/span><\/a><a href=\"https:\/\/panelsandwich.org\/en\/sandwich-panel-technical-information\/03-production\/\"><strong>Production<\/strong><span>Profiling, core formation, bonding, curing, cutting, and packaging.<\/span><\/a><a href=\"https:\/\/panelsandwich.org\/en\/sandwich-panel-technical-information\/04-painting\/\"><strong>Paint and coatings<\/strong><span>Metal protection, organic paints, color, and corrosion.<\/span><\/a><a href=\"https:\/\/panelsandwich.org\/en\/sandwich-panel-technical-information\/05-best-practices\/\"><strong>Best practices<\/strong><span>Cutting, fastening, swarf, metal compatibility, and maintenance.<\/span><\/a><a href=\"https:\/\/panelsandwich.org\/en\/sandwich-panel-technical-information\/06-quality-control\/\"><strong>Quality control<\/strong><span>Raw materials, process, dimensions, performance, and documentation.<\/span><\/a><a href=\"https:\/\/panelsandwich.org\/en\/sandwich-panel-technical-information\/07-storage-and-transportation\/\"><strong>Storage and transport<\/strong><span>Unloading, support, humidity, lifting, and handling.<\/span><\/a><a href=\"https:\/\/panelsandwich.org\/en\/sandwich-panel-technical-information\/08-lucenarios\/\"><strong>Skylights<\/strong><span>Polycarbonate, profiles, joints, fixings, and expansion.<\/span><\/a><a href=\"https:\/\/panelsandwich.org\/en\/sandwich-panel-technical-information\/09-fire-tests\/\"><strong>Tests and fire performance<\/strong><span>Reaction, resistance, Euroclasses, and tested system.<\/span><\/a><a href=\"https:\/\/panelsandwich.org\/en\/sandwich-panel-technical-information\/10-acoustic-behavior\/\"><strong>Acoustic performance<\/strong><span>Insulation, absorption, perforated faces, and indirect transmission.<\/span><\/a><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-675cf991 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"675cf991\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-1eac112b\" data-id=\"1eac112b\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-4a436173 elementor-widget elementor-widget-heading\" data-id=\"4a436173\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Frequently asked questions<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-551fa7ef elementor-widget elementor-widget-accordion\" data-id=\"551fa7ef\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"accordion.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-accordion\">\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1421\" class=\"elementor-tab-title\" data-tab=\"1\" role=\"button\" aria-controls=\"elementor-tab-content-1421\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<i class=\"elementor-accordion-icon-closed Array\"><\/i>\n\t\t\t\t\t\t\t\t<i class=\"elementor-accordion-icon-opened \"><\/i>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">What exactly is a sandwich panel?<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1421\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"1\" role=\"region\" aria-labelledby=\"elementor-tab-title-1421\"><p>It is a composite element consisting of two relatively thin and resistant faces separated by a lightweight core. The assembly works as a unit and combines mechanical function, protection, and insulation. <\/p>\n<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1422\" class=\"elementor-tab-title\" data-tab=\"2\" role=\"button\" aria-controls=\"elementor-tab-content-1422\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<i class=\"elementor-accordion-icon-closed Array\"><\/i>\n\t\t\t\t\t\t\t\t<i class=\"elementor-accordion-icon-opened \"><\/i>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">What is the main difference between facade, roof, and refrigeration panels?<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1422\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"2\" role=\"region\" aria-labelledby=\"elementor-tab-title-1422\"><p>Geometry, loads, joints, and airtightness level change. Roof panels must address slope and loads on the roof; facade panels prioritize vertical enclosure; refrigeration panels require special thermal continuity and air and vapor control. <\/p>\n<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1423\" class=\"elementor-tab-title\" data-tab=\"3\" role=\"button\" aria-controls=\"elementor-tab-content-1423\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<i class=\"elementor-accordion-icon-closed Array\"><\/i>\n\t\t\t\t\t\t\t\t<i class=\"elementor-accordion-icon-opened \"><\/i>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Do PUR, PIR, and rock wool behave the same way?<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1423\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"3\" role=\"region\" aria-labelledby=\"elementor-tab-title-1423\"><p>No. They have thermal, weight, acoustic, and fire performance differences. Comparison must be made with declared data of the complete panel, not just the core name.  <\/p>\n<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1424\" class=\"elementor-tab-title\" data-tab=\"4\" role=\"button\" aria-controls=\"elementor-tab-content-1424\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<i class=\"elementor-accordion-icon-closed Array\"><\/i>\n\t\t\t\t\t\t\t\t<i class=\"elementor-accordion-icon-opened \"><\/i>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Are metal faces just a finish?<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1424\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"4\" role=\"region\" aria-labelledby=\"elementor-tab-title-1424\"><p>No. They also provide mechanical capacity, surface rigidity, core protection, and part of the system&#8217;s airtightness and durability. <\/p>\n<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1425\" class=\"elementor-tab-title\" data-tab=\"5\" role=\"button\" aria-controls=\"elementor-tab-content-1425\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<i class=\"elementor-accordion-icon-closed Array\"><\/i>\n\t\t\t\t\t\t\t\t<i class=\"elementor-accordion-icon-opened \"><\/i>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Does a very airtight enclosure need ventilation?<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1425\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"5\" role=\"region\" aria-labelledby=\"elementor-tab-title-1425\"><p>Yes. Reduced infiltration does not eliminate the need for air renewal. Ventilation must be planned in the design for health and humidity control.  <\/p>\n<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1426\" class=\"elementor-tab-title\" data-tab=\"6\" role=\"button\" aria-controls=\"elementor-tab-content-1426\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<i class=\"elementor-accordion-icon-closed Array\"><\/i>\n\t\t\t\t\t\t\t\t<i class=\"elementor-accordion-icon-opened \"><\/i>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Can I use the historical data on this page to dimension a project?<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1426\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"6\" role=\"region\" aria-labelledby=\"elementor-tab-title-1426\"><p>No. They are retained as a technical reference and for content evolution. For calculation and specification, current data sheets, DoP, load tables, tests, and documentation of the specific product must be used.  <\/p>\n<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t<\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>TECHNICAL GUIDE \u2022 SANDWICH PANEL Sandwich Panel Technical Information How a sandwich panel works, what its faces and core provide, how facade, roof, and cold storage solutions change, and what should be reviewed regarding insulation, airtightness, corrosion, fire, acoustics, durability, and recyclability. This V4 retains and reorganizes the historical technical content of the section but [&hellip;]<\/p>\n","protected":false},"author":5963,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-75038","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/panelsandwich.org\/en\/wp-json\/wp\/v2\/pages\/75038","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/panelsandwich.org\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/panelsandwich.org\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/panelsandwich.org\/en\/wp-json\/wp\/v2\/users\/5963"}],"replies":[{"embeddable":true,"href":"https:\/\/panelsandwich.org\/en\/wp-json\/wp\/v2\/comments?post=75038"}],"version-history":[{"count":1,"href":"https:\/\/panelsandwich.org\/en\/wp-json\/wp\/v2\/pages\/75038\/revisions"}],"predecessor-version":[{"id":75048,"href":"https:\/\/panelsandwich.org\/en\/wp-json\/wp\/v2\/pages\/75038\/revisions\/75048"}],"wp:attachment":[{"href":"https:\/\/panelsandwich.org\/en\/wp-json\/wp\/v2\/media?parent=75038"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}