Sandwich panels for industrial walls and roofs
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What it is
Sandwich panels for industrial walls and roofs are a family of products with the same basic construction as insulated metal roofing (two metal faces with rigid PU foam core), but in larger formats and with different structural requirements. Panels can be 10 to 18 meters long, with widths of 1 to 1.2 meters and thicknesses of 40 to 200 mm. They are used as complete envelope elements — they replace the traditional construction of masonry + internal insulation + external finish with a single integrated solution.
The category covers three main subdivisions: wall panels (used in elevations of industrial sheds, commercial buildings, DCs, supermarkets, and production plants), roof panels (used in roofs of the same buildings, with specific profile for rain drainage), and cold storage panels (specific for cold rooms and controlled environments, with higher thickness and superior sealing). The predominant core is rigid PU foam; the main alternative on the market is mineral wool (greater fire resistance, lower thermal performance and greater mass).
Wall and roof panels typically use density between 38 and 45 kg/m³. Cold storage panels use higher densities (45–50 kg/m³) and specialized PIR systems for enhanced fire resistance and thermal stability at negative temperatures.
Why it matters
Sandwich panels represent the largest volume segment by mass of rigid PU foam in construction globally. For the manufacturer, the chemistry is the largest single cost component of the product (30–45% of direct cost) and simultaneously the greatest vector of differentiation against competitors. A 5% saving in chemistry on an industrial plant producing 1 million m²/year can mean millions of reais in annual margin.
At the same time, poorly specified chemistry can destroy the business. The construction market has become brutally demanding on fire performance after events like the Grenfell Tower fire (UK, 2017) which led to the reform of reaction-to-fire regulations in Europe and generated pressure in several markets. Brazilian fire departments (especially São Paulo's Corpo de Bombeiros) have strengthened their inspections of commercial and industrial buildings, and insurance companies price premiums based on reaction-to-fire classification of the construction envelope.
For large projects — data centers, logistics centers of major retailers, industrial plants of multinationals — fire certification and documentation of environmental properties (GWP of blowing agent, recycled content, traceability) are decisive factors in supplier selection. Manufacturers unable to offer systems certified at this level are automatically excluded from these projects.
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Related applications
Insulated metal roofing (sandwich panels)
PUR/PIR system · PIR system
Closed-cell spray foam insulation
Closed-cell spray foam 2K system · Open-cell spray foam 2K system (water-blown)
Roof and slab waterproofing
1K liquid PU membrane · 2K liquid PU membrane
Structural construction adhesives
1K PU adhesive (moisture-cure) · 2K structural PU adhesive