The Site Assembled Roof Panel is a high-performance roofing system designed for steel structure buildings. Unlike factory-made sandwich panels, the Site Assembled Roof Panel is manufactured on site. The steel sheets are delivered to the project location. Then rock wool or fiberglass insulation is installed between the sheets. Finally, the panels are assembled into a complete roof.
This field assembled metal roof offers several advantages. It can be made to any length. Transportation costs are lower because the materials are shipped as flat sheets. The Site Assembled Roof Panel is ideal for large industrial projects where custom lengths are required.
China Factory DirectSite AssembledA1 Fire RatingU-Value 0.35Length up to 20mFree Design SupportCE Certified
Site Assembled Roof Panel – Field Assembled Metal Roof for Steel Buildings
Field Assembled Metal Roof · Rock Wool Core · U-Value 0.35 W/m²K · A1 Fire Rated · Custom Lengths up to 20m · Free Design Consultation
Site AssembledCustom lengths up to 20m. No bulky transport.Cost-Effective
A1 Fire RatingRock wool core, non-combustible, ≥60min fire resistance.Maximum Safety
Energy EfficientU-value as low as 0.35 W/m²K, save up to 10% energy.Save Energy
Field Assembled Metal RoofFast installation, 500+ m² per day.Quick Install
Steel Structure CompatibleDesigned for factories, warehouses, cold storage.Versatile
What Is Site Assembled Roof Panel?
The Site Assembled Roof Panel consists of three main components: an outer color-coated steel sheet, a middle layer of rock wool or fiberglass insulation, and an inner steel sheet. All components are assembled on site. This field assembled metal roof eliminates the need for long-distance shipping of bulky sandwich panels. Each panel is custom-made to your exact building dimensions, providing a strong and energy-efficient roofing system for steel structure buildings.
Why Choose Field Assembled Metal Roof for Steel Buildings?
Cost-Effective Shipping Low shipping volume – steel sheets and insulation rolls arrive in compact bundles, reducing transportation costs significantly.
Custom Any Length Panels can be produced up to 20 meters, eliminating end-joints and ensuring a seamless roof.
Fast Installation A skilled crew can install over 500 square meters per day, making it ideal for large-scale projects.
Superior Thermal Performance With rock wool insulation, the Composite Roof Panel for Steel Building achieves a U-value as low as 0.35 W/m²K, reducing HVAC costs.
A1 Fire Safety The rock wool core is non-combustible, providing over 60 minutes of fire resistance (80mm thickness).
Factory Direct Pricing CE certified materials, smart production, and export to 50+ countries. Full logistics support.
Explore Our Complete Building Solutions
Beyond our Site Assembled Roof Panel, Glostar offers a full range of roofing and facade solutions to meet your project needs:
Cold Storage FacilitiesPrevents condensation, high R-value
Frequently Asked Questions
What is a Site Assembled Roof Panel?
A roofing system assembled on-site from steel sheets and insulation core (rock wool or fiberglass). Cost-effective for large-span steel buildings, A1 fire rated, and custom-made up to 20 meters.
What are the advantages over factory sandwich panels?
Lower shipping volume, custom any length, lower initial cost, and reduced transportation costs. Ideal for large projects where shipping bulky panels is expensive.
Is the Site Assembled Roof Panel fireproof?
Yes, with rock wool core it achieves A1 fire rating (non-combustible) and provides over 60 minutes of fire resistance (80mm thickness).
What is the U-value of this roof panel?
It achieves U-values as low as 0.35 W/m²K, providing excellent thermal insulation and energy savings.
Can I get a free sample?
Yes, we provide sample panels for material and finish validation. Contact us to request your sample.
What is the minimum order quantity?
Minimum order is 1000 square meters. Lead time: 10-15 days after deposit.
60,000 m² Smart Factory6,000 m² Daily Output50+ Countries ExportISO 9001 & CECNAS Lab Tested
Get Your Site Assembled Roof Quote Today
Free Design Consultation · Custom Panel Sizes · Full Installation Support · Factory Direct Price
Glostar New Materials Group Co., Ltd. – China Factory Direct
What Is Site Assembled Roof Panel
The Site Assembled Roof Panel consists of three main components. The outer layer is a color-coated steel sheet. The middle layer is rock wool or fiberglass insulation. The inner layer is another steel sheet. All components are assembled on site.
When you choose our Site Assembled Roof Panel, you get a roofing system that is both strong and energy efficient. The field assembled metal roof eliminates the need for long-distance shipping of bulky sandwich panels. Each Site Assembled Roof Panel is custom-made to your exact building dimensions.
Field Assembled Metal Roof for Steel Buildings
The Field Assembled Metal Roof is specifically designed for steel structure buildings. Factories, warehouses, and workshops benefit from this system. The Field Assembled Metal Roof can span long distances between purlins.
Installation is straightforward. The steel sheets are roll-formed on site or delivered pre-cut. The insulation is placed between the sheets. The entire Field Assembled Metal Roof is then fastened to the steel frame. A skilled crew can install over 500 square meters of Field Assembled Metal Roof per day.
For large-scale projects, the Field Assembled Metal Roof is the most cost-effective solution. You save on shipping costs. You avoid the risk of damaging factory-made panels during transport. The Field Assembled Metal Roof arrives as compact bundles of steel sheets and insulation rolls.
Composite Roof Panel for Steel Building Performance
The Composite Roof Panel for Steel Building combines the strength of steel with the thermal performance of mineral wool. This Composite Roof Panel for Steel Building achieves a U-value as low as 0.35W/m²K.
The Composite Roof Panel for Steel Building provides excellent fire resistance. The rock wool core is non-combustible. A Composite Roof Panel for Steel Building with 80mm insulation thickness offers over 60 minutes of fire protection.
For building owners, the Composite Roof Panel for Steel Building reduces energy costs. Summer heat stays outside. Winter warmth stays inside. The Composite Roof Panel for Steel Building can lower HVAC expenses by up to 10%.
Rock Wool Site Assembled Panel Fire Safety
The Rock Wool Site Assembled Panel uses stone wool as the insulation core. Rock wool is naturally fire-resistant. Our Rock Wool Site Assembled Panel achieves A1 fire rating under EN 13501-1.
When exposed to fire, the Rock Wool Site Assembled Panel does not burn. It produces no toxic smoke. It prevents flame spread. A Rock Wool Site Assembled Panel maintains its structural integrity even at temperatures above 1000°C.
For buildings with strict fire safety requirements, the Rock Wool Site Assembled Panel is the preferred choice. Schools, hospitals, and industrial facilities all benefit from the Rock Wool Site Assembled Panel.
Site Built Insulation Roof Panel Thermal Performance
The Site Built Insulation Roof Panel is engineered for energy efficiency. The insulation core has a thermal conductivity of ≤0.045W/(m·K). A Site Built Insulation Roof Panel maintains comfortable indoor temperatures year-round.
The Site Built Insulation Roof Panel is available with different insulation thicknesses. For standard applications, 50mm to 80mm is sufficient. For extreme climates, the Site Built Insulation Roof Panel can be made with 100mm to 150mm of insulation.
Unlike single-layer metal roofs, the Site Built Insulation Roof Panel prevents condensation. The insulation stops warm air from reaching the cold steel surface. This makes the Site Built Insulation Roof Panel ideal for humid environments.
Rock Wool Site Assembled Panel Technical Specifications
Parameter
Value
Panel type
Site Assembled Roof Panel
Steel thickness
0.4mm to 0.6mm
Steel coating
PE, PVDF, HDP
Insulation material
Rock wool or fiberglass
Insulation density
100kg/m³ to 150kg/m³
Insulation thickness
50mm, 60mm, 75mm, 80mm, 100mm, 120mm, 150mm
Thermal conductivity
≤0.045W/(m·K)
Fire rating
A1 (non-combustible)
Fire resistance
≥60 min (80mm thickness)
Panel length
Custom, up to 20 meters
Panel width
600mm to 1000mm
Rock Wool Site Assembled Panel Installation Process
Installing the Rock Wool Site Assembled Panel follows these steps:
The steel purlins are installed on the building frame.
The outer steel sheets are fastened to the purlins.
Rock wool insulation is placed over the outer sheets.
The inner steel sheets are fastened through the insulation.
All joints are sealed to prevent air leakage.
The Rock Wool Site Assembled Panel system requires no special tools. Standard power tools and fasteners are sufficient. A crew of four can install over 1000 square meters of Rock Wool Site Assembled Panel per week.
Rock Wool Site Assembled Panel vs. Factory Sandwich Panels
Feature
Rock Wool Site Assembled Panel
Factory Sandwich Panel
Shipping volume
Low (flat sheets)
High (bulky panels)
Length flexibility
Custom any length
Limited to factory length
Installation speed
Medium
Fast
Initial cost
Lower
Higher
Transportation cost
Low
High
On site assembly
Required
Not required
The Rock Wool Site Assembled Panel is best for large projects where shipping costs are a concern. For smaller projects, factory panels may be more convenient.
Applications of Site Assembled Roof Panel
Application
Why Site Assembled Roof Panel
Steel structure factories
Long spans, energy efficient, fire safe
Warehouses
Cost effective, fast installation, durable
Industrial buildings
Custom lengths, high insulation value
Agricultural buildings
Affordable, weather resistant
Sports halls
Large clear spans, acoustic insulation
Cold storage facilities
Prevents condensation, high R-value
Why Choose Our Site Assembled Roof Panel
Custom lengths up to 20 meters
A1 fire rated rock wool insulation
CE certified materials
Factory direct pricing
Fast shipping to Africa
Technical support for installation
Order Information
Minimum order: 1000 square meters
Lead time: 10-15 days after deposit
Payment: T/T or L/C
Packaging: Steel sheets on pallets, insulation rolls wrapped
Shipping: FOB China port
Performance features
1.Exceptional Wind Uplift Resistance
2.Superior Air & Moisture Barrier
3.Secure Connections with Integrated Stress Relief
4.Extended Roof System Lifespan
5.High-Density Layout Ready for Anti-Soiling PV Modules
IW PU edge-sealed tongue and groove composite panel deploys the excellent waterproof properties of polyurethane, and by working together with rock wool, the new product manages to avoid the drawbacks associated with traditional panels. These panels excel significantly in waterproofing, thermal insulation, sound absorption, and raw material utilization. They are suitable for interior wall partitions and suspended ceilings.
The Glostar Rockwool Sandwich Panel is a high-performance, factory-prefabricated insulated panel engineered for building wall and roof applications requiring superior fire protection, thermal insulation, and structural strength. Featuring a high-density rockwool core (120-140kg/m³) , the panel delivers Class A fire resistance (non-combustible, GB8624 A1 grade), exceptional thermal insulation with thermal conductivity as low as 0.27 W/m²·k, and excellent acoustic absorption.
The panel construction comprises a durable metal face sheet (steel or aluminum) bonded to a 100% rockwool-filled core using high-strength adhesive. Available in standard thicknesses from 50mm to 250mm, widths from 500mm to 1200mm, and lengths up to 15,000mm, the system supports multiple surface patterns including mirror, corrugated, and mini-corrugated finishes. Unique design features—including reinforced fixing points, spaced back beams, and interlocking joints—ensure structural stability, easy installation, and long-term durability.
Fully compliant with GB/T 23932-2009 standards, the Glostar Rockwool Sandwich Panel is the ideal solution for industrial buildings, commercial facilities, cold storage, and high-rise construction where fire safety, thermal efficiency, and cost-effectiveness are paramount. Factory direct supply. Free sample available. 24/7 technical support.
The Glostar Metal Integrated Insulation Curtain Wall System – Framed Series is a stick-built, high-performance facade solution featuring a site-assembled aluminum or steel frame structure with factory-prefabricated insulated sandwich panels. As part of Glostar's integrated curtain wall family, the Framed Series combines the structural flexibility of traditional framed systems with the thermal performance, fire safety, and aesthetic quality of the MIICW panel system.
The system comprises vertical mullions and horizontal transoms installed on-site to form a grid framework, onto which the A1 fire rated rock wool core sandwich panels are securely fixed and sealed. The thermally broken aluminum frame profiles prevent thermal bridging, while the panels deliver thermal conductivity as low as 0.34 W/m²·k, Grade 9 wind load resistance, and surface flatness within ≤0.5mm/m. The panel exterior face features PVDF, HDP, PE, or SMP coatings for long-term weather resistance and color stability.
The Framed Series offers exceptional design flexibility—supporting large panel dimensions up to 2,000mm x 8,000mm, custom RAL colors, diverse surface textures, and integration with glazing systems for hybrid metal-and-glass facades. It is fully compliant with GB/T 23932-2009, JG/T 453-2019, and JGJ 133-2001 standards. Factory direct panel supply. Free design support. 24/7 global assistance.
NS Standardized Metal Insulation Curtain Wall System, Standardized Metal Curtain Wall, Insulated Metal Facade System, Thermal Break Curtain Wall, A2 Fire Rated Cladding, High-end Metal Building Envelope, Glostar
Starting from anti-corrosion aluminum honeycomb core and high-strength aluminum sheets, ELKOM honeycomb metal curtain wall is made under high temperature and pressure with specialized adhesives. This composite panel is lightweight, strong, and has a perfectly smooth surface. Moreover, its seam width, materials, and colors also come with various options, enabling the display of diverse wall surface effects. Honeycomb panel technology, which was widely applied in the aerospace industry, has been adopted in the construction sector for its unique functionality and aesthetics.
The Glostar Metal Integrated Insulation Curtain Wall System – FP is a factory-prefabricated sandwich panel solution engineered for high-rise buildings, healthcare facilities, pharmaceutical campuses, and public infrastructure projects. As a leading manufacturer, Glostar integrates structural support, thermal insulation, and aesthetic finishing into a single composite panel with a three-layer construction: PVDF or LUXACOTE coated aluminum face sheets, a high-density hydrophobic rock wool core, and a protective metal back sheet.
The rock wool core delivers Class A surface fire resistance (GB8624 A2 non-combustible) and fire resistance up to 60 minutes at 80mm thickness. The thermally broken aluminum frame design minimizes heat conduction, achieving thermal conductivity as low as 0.34 W/m²·k and supporting 75% building energy conservation standards. Independent testing confirms Grade 9 wind load resistance (GB/T 15227) and surface flatness within ≤0.5mm/m—eliminating the deformation issues common in single-layer aluminum veneer systems.
Available in thicknesses from 50mm to 120mm, with RAL Classic color options and PVDF/POLYESTER/LUXACOTE coatings, the FP system employs a socket-and-plug interlocking assembly that reduces on-site installation time by up to 60%. It meets GB/T 23932-2009, JG/T 453-2019, and JGJ 133-2001 standards, with E1 formaldehyde emission compliance for indoor applications. Factory direct pricing. Free design support. 24/7 global technical assistance.
The HP Metal Curtain Wall System is a premium insulated sandwich panel solution engineered for high-rise buildings, industrial facilities, and public infrastructure. Featuring a non-combustible rock wool core (A1 fire rated up to 4 hours) and PVDF-coated aluminum face sheets, this prefab curtain wall system delivers exceptional thermal insulation (U-value as low as 0.32 W/m²·k), superior wind load resistance (Grade 9), and outstanding structural rigidity with surface flatness ≤0.5mm/m.
As a factory-direct metal cladding manufacturer, we provide complete turnkey solutions from design to installation. Our interlocking panel system enables rapid on-site assembly, reducing construction time by up to 30% compared to traditional aluminum veneer systems. Available in 50-120mm thicknesses, custom RAL colors, and multiple coating finishes (PVDF/LUXACOTE/POLYESTER), the HP system meets GB/T 23932-2009 and JGJ 133-2001 standards. Free samples available. 24/7 global technical support.
The Glostar Metal Integrated Insulation Curtain Wall System – Modular Series is a factory-prefabricated, high-performance sandwich panel solution engineered for fast-track construction projects. As part of Glostar's integrated curtain wall family, the Modular Series combines the core advantages of the MIICW system—Class A surface fire resistance (GB8624 A2 non-combustible), high-density hydrophobic rock wool core, and thermally broken aluminum frames—with the construction efficiency of modular, pre-engineered panel units.
The system features a three-layer composite construction: PVDF, HDP, PE, or SMP coated aluminum face sheets, a rock wool insulation core, and a protective metal back sheet, all factory-bonded using two-component polyurethane adhesive. The system achieves thermal conductivity as low as 0.34 W/m²·k, Grade 9 wind load resistance per GB/T 15227, surface flatness within ≤0.5mm/m, and 30+ year durability. The socket-and-plug interlocking assembly enables rapid on-site installation, reducing construction time by up to 60% compared to traditional aluminum veneer systems.
Available in thicknesses from 50mm to 120mm, with RAL Classic color options and PVDF/HDP/PE/SMP coating selections. Fully compliant with GB/T 23932-2009, JG/T 453-2019, and JGJ 133-2001 standards, with E1 formaldehyde emission compliance. Factory direct pricing. Free design support. 24/7 global assistance.
The Glostar Metal Integrated Insulation Curtain Wall System – VF (Ventilation Function) is a factory-prefabricated, naturally ventilated facade solution that integrates operable opening vents into high-performance insulated metal sandwich panels. Engineered for high-rise office buildings, commercial towers, and public facilities, the VF system combines the core advantages of the Metal Integrated Insulation Curtain Wall series—Class A surface fire resistance (GB8624 A2 non-combustible), rock wool core insulation (U-value as low as 0.34 W/m²·k), and Grade 9 wind load resistance—with a built-in natural ventilation function that improves indoor air quality and reduces mechanical ventilation energy costs.
The system features a distinctive recessed unit design with solid opening vents positioned on the inner face, while ventilation louvers are integrated into the exterior projection—achieving a seamless architectural appearance without compromising facade aesthetics. The thermally broken aluminum frame, multi-seal rubber gaskets, and dense rock wool filling ensure excellent air tightness, water tightness, and acoustic insulation. Available in customized sizes, RAL Classic colors, and multiple coating options (PVDF/LUXACOTE/POLYESTER), the VF system supports three natural ventilation principles: single-sided ventilation, cross ventilation, and stack ventilation.
As a factory-direct prefabricated system, it reduces on-site installation time by up to 60% compared to traditional aluminum veneer + frame-assembled operable vents. Factory direct pricing. Free design support. 24/7 global technical assistance.
steel, stainless steel, or aluminum) bonded to insulation cores such as rock wool, glass-magnesium rock wool, gypsum rock wool, aluminum honeycomb, or magnesium oxysulfate through continuous lamination or hot-press molding. Prefab clean rooms offer excellent airtightness, fire resistance (A-class), corrosion resistance, easy cleaning, and modular flexibility. Common product types include hand-fabricated clean room panels (featuring tongue-and-groove or box-rib connections for high structural integrity), machine-formed clean room panels (cost-effective solutions for standard applications), and demountable wall panel systems (allowing quick reconfiguration). Read More
Sandwich panel rockwool (also known as IW rock wool sandwich panels, PU edge-sealed rock wool panels, or rock wool roof panels) are high-performance composite building components consisting of two metal face sheets (color coated steel, aluminum‑magnesium‑manganese alloy, or stainless steel) bonded to a rock wool insulation core through a continuous lamination or hot‑press molding process. These panels offer excellent fire resistance (A‑class), thermal insulation, soundproofing, high surface flatness, and easy installation. Read More
Clean room panels (also known as hand-fabricated clean room panels, machine-formed clean room panels, or rock wool clean room panels) are specialized composite building components designed for controlled environments requiring strict particle control, hygiene, and environmental stability. These panels consist of metal face sheets (color coated steel, stainless steel, or aluminum) bonded to an insulation core such as rock wool, glass-magnesium rock wool, gypsum rock wool, aluminum honeycomb, or magnesium oxysulfate through a continuous lamination or hot-press molding process. Read More
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