Panel Construction and Profile
The PU Edge-Sealed Rock Wool Three Wave Corrugated Roofing Panel is manufactured as a factory-bonded composite assembly. The upper face is a color-coated steel sheet formed into a three-wave corrugated profile, providing structural rigidity across the panel span and facilitating efficient rainwater runoff across the roof surface. A rock wool mineral fiber insulation core is continuously bonded between the upper and lower steel faces, with polyurethane foam applied along all four exposed panel edges to seal the mineral fiber against moisture ingress and improve edge handling integrity. The result is a single rigid panel unit that is ready for direct installation onto purlin or structural steel frame systems.
Polyurethane Edge-Sealing System
The polyurethane edge seal is the defining structural detail that differentiates this panel from standard rock wool sandwich roofing panels. In conventional rock wool panels, the cut edges of the mineral fiber core are left exposed or covered only by the overlapping steel face, which can allow moisture to enter the core over time, particularly at ridge, eave, and side-lap joint positions. The PU edge seal encloses the rock wool core on all panel edges, helping to reduce moisture ingress risk, improve the dimensional consistency of the panel joint, and support more reliable sealing performance at installation interfaces. This edge treatment also contributes to improved handling and edge protection during transport and on-site installation.
Surface Material and Coating Options
The outer steel face is manufactured from color-coated galvanized or aluminum-zinc steel sheet, available in thicknesses of 0.4 mm to 0.8 mm. Three surface coating systems are available to suit different environmental exposure and budget requirements. PVDF fluorocarbon coating provides the highest level of UV resistance, color retention, and long-term surface weathering performance, and is recommended for projects in high-UV, coastal, or chemically exposed environments. SMP silicon-modified polyester coating offers a balanced combination of weathering resistance and cost efficiency. PE ordinary polyester coating is suitable for standard commercial and agricultural applications where moderate surface performance is acceptable. Standard available colors are white-grey, scarlet, navy blue, and iron grey, with custom colors accepted on request.
Rock Wool Insulation Core
The insulation core is composed of rock wool mineral fiber, which is manufactured from molten volcanic basalt or similar mineral materials spun into fibrous form. Rock wool provides inherently fire-retardant characteristics as a mineral fiber material, contributes to the panel’s sound attenuation performance, and offers low moisture absorption under normal service conditions. The thermal conductivity of the panel assembly ranges from 0.035 to 0.041 W/m·K depending on core thickness and density selection, providing effective thermal insulation for heated, ventilated, or cooled building envelopes. The fire performance of the assembled panel meets GB8624 Grade B1 standard, making it suitable for applications where building regulations require flame-retardant roofing materials. Buyers are advised to confirm local fire compliance requirements before specification.
Dimensions and Customization
The panel has an effective coverage width of 1,000 mm, reducing the total number of panels and joint lines required across a given roof area. Core thickness options of 50 mm, 60 mm, 75 mm, 80 mm, 100 mm, and 150 mm allow the panel to be specified according to local thermal insulation requirements, structural load conditions, and project budget. The color steel facing thickness ranges from 0.4 mm to 0.8 mm. Panel length is produced to order and can be specified according to purlin spacing, transport conditions, and structural design requirements. Fuqiang accepts custom specifications for non-standard lengths, thicknesses, colors, surface coatings, and facing materials based on customer drawings or project requirements.
Installation Compatibility and Accessories
The three-wave corrugated profile is designed for installation onto standard cold-formed steel purlins or hot-rolled steel secondary framing at purlin spacings appropriate for the selected panel thickness and span requirements. The nail fastening system is positioned at the raised wave ribs to reduce the number of roof face penetrations. Matching roofing accessories available from Fuqiang include ridge caps, eave trims, barge flashings, valley flashings, gutter sections, corner pieces, and joint sealant tapes, enabling single-source procurement for the complete roofing system. Technical data on recommended purlin spacing, load capacity, and fastener specifications is available upon request.
Project Suitability
This panel is particularly suited to projects where fire-retardant roofing material is required alongside practical thermal insulation and weather resistance. Typical applications include industrial manufacturing facilities, large-span commercial warehouses, logistics and distribution centers, steel structure buildings, prefabricated construction projects, and agricultural facilities. The combination of rock wool mineral fiber core, PU edge sealing, hidden fastener positioning, and corrugated drainage profile makes it well suited to projects across a broad range of climatic conditions, including tropical, temperate, and arid environments. The panel can be used in new construction and re-roofing upgrade applications.
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