Brief Description:Lightweight rock wool composite panel adopts vertical basalt fibre structure with A1 non-combustible grade. It features low density, high compressive strength, good hydrophobicity, weather resistance and acoustic performance. Factory prefabricated for precise dimensions, ideal for ETICS external wall and building energy-saving projects.

Haochen Lightweight Rock Wool Composite Panel is a mainstream prefabricated A1 non-combustible board for external wall thermal insulation. It adopts vertically orientated basalt rock wool strips as the core insulating core, clad on both sides with high-quality cement-based fibre mat facings. The vertical rock wool strips and facings are integrally cured and compression moulded by means of polyurethane bonding composite technology. Optimised with a lightweight formulation to reduce dead weight, the product retains the full fire resistance, thermal insulation and acoustic performance inherent to rock wool, while delivering dual benefits of low density and high compressive strength. It addresses common industry limitations of conventional rock wool slabs: excessive self-weight, insufficient compressive resistance, tendency to delaminate, detachment from substrates and labour-intensive on-site rendering works. Suitable for high-rise buildings, energy-saving retrofits of aged residential blocks, lightweight steel workshops and projects subject to load constraints, it is the preferred lightweight, energy-saving, fire-resistant thermal insulation material.

1. Three-layer Integrated Composite Structure (Polyurethane fully bonded, no delamination or shell separation)

1. Top Layer: Cement-based fibre reinforced panelThe panel surface has high hardness, excellent flatness, built-in water repellent and crack-resistant properties with dense, stable structure. After installation, external coatings or decorative ceramic tiles may be applied directly, removing the need for on-site rendering and mesh levelling. This greatly simplifies site operations and effectively prevents cracking, sanding and hollowing of the wall finish.

2. Core Layer: Lightweight, hydrophobic vertically orientated rock wool stripsManufactured from selected natural basalt ore melted and drawn into fibres at high temperature, it features vertically aligned fibre architecture, distinct from conventional horizontally orientated rock wool boards. Through polyurethane penetration composite technology, the rock wool strips bond firmly to the facings for enhanced structural integrity. Customisable density ranges from 100 to 140 kg/m³, achieving a 30% weight reduction compared with standard rock wool slabs. While maintaining low density and lightweight characteristics, compressive and tensile pull-off strength are improved; the board resists compressive deformation, delamination and fracture, delivering long-term stable thermal and fire performance. It also boasts outstanding hydrophobicity and moisture resistance, preventing sagging and loss of insulation performance caused by water absorption.

3. Base Layer: Waterproof Reinforced Backing BoardA dedicated waterproof reinforced substrate that blocks moisture ingress from the wall assembly. Combined with the integral polyurethane composite process, the three layers bond tightly as a monolithic unit. It will not bulge, delaminate or detach over long service life, compatible with a wide range of complex external wall substrates.

2. Core Product Parameters

1. Fire classification: A1 non-combustible

2. Thermal conductivity: ≤0.040 W/(m·K), compliant with the latest 75% building energy-saving requirements

3. Optional density: 80–140 kg/m³, customisable

4. Hydrophobic rate: ≥98%

5. Standard dimensions: 1200 × 600 mm; other sizes available to order. Available thicknesses: 30 / 50 / 60 / 80 / 100 / 120 mm

6. Service life: ≥25 years weathering exposure, sustained performance without degradation

3. Eight Core Advantages (Lightweight + high structural strength as key selling points)

1. Ultra-lightweight with high compressive strength, reducing overall structural load (key feature)Using low-density formulation coupled with polyurethane integral composite manufacturing, the panel dead weight is substantially reduced whilst retaining excellent compressive strength, overcoming the weakness of lightweight materials prone to deformation and low compression resistance. It lessens the load on external walls and can be safely deployed for high-rise residential blocks, refurbishment of old buildings, large-span lightweight steel roofing and load-limited constructions. It can reduce reinforcement steel requirements by 5–10%, mitigating safety risks such as wall settlement and panel detachment, making it the material of choice for lightweight insulation projects.

2. A1 fire safety, reliable performance for project handoverMade of naturally inorganic mineral raw materials, the full assembly achieves A1 non-combustible classification. It will not burn under high-temperature exposure, emits minimal smoke and releases no toxic or harmful fumes, effectively restricting flame spread. It acts as a core material for external wall fire barriers on high-rise buildings and meets fire safety requirements for public buildings including schools, hospitals and care centres, offering greater assurance for fire compliance acceptance.

3. Combined thermal insulation and sound attenuationThe vertical porous fibre structure delivers low thermal conductivity, retaining indoor heat in winter and blocking external heat ingress in summer. It markedly cuts heating and air-conditioning energy consumption and satisfies national energy-saving standards. The fibrous cavities provide inherent sound absorption, offering noise reduction of ≥40dB to mitigate external sound transmission, ideal for noise control projects on roadside blocks, factory workshops and office buildings.

4. Standardised dimensions and high-precision flatnessThis lightweight composite rock wool panel is precision manufactured as an integrated factory product with uniform, regular faces, eliminating warping, undulation and excessive dimensional tolerance found in traditional boards. Dimensional tolerances are strictly controlled: thickness tolerance ±2mm, length tolerance ±5mm, delivering superior surface flatness and consistent quality across batches. With regular formwork, extensive edge trimming and levelling on site are unnecessary. Panels fit closely with uniform joint gaps, improving installation accuracy and façade aesthetics, cutting rework and reducing labour and consumable costs for high-specification external wall render insulation projects.

5. Vertical fibre structure with polyurethane composite, high pull-off resistance against detachmentConventional horizontally orientated rock wool boards suffer from easy delamination and low strength. This product adopts vertical fibre arrangement combined with full polyurethane penetration bonding, doubling the vertical tensile strength of the board. Interlayer bonding is robust, securing the panel firmly to wall substrates, fundamentally addressing common defects of insulation layer detachment, cracking and delamination on external walls and enhancing safety factors for high-rise façades.

6. Eco-friendly, no hazardous substancesRaw materials sourced from natural basalt. No volatile hazardous substances such as formaldehyde or benzene are released during manufacture. Low-carbon and green, aligned with sustainable building material principles, safe for use in both public and civil projects.

7. Flexible specifications, customised direct from manufacturerPanel thickness, density, length and width can all be tailored to construction drawings and project requirements. Standard specifications held in stock; large-scale project orders can be scheduled for stable production and prompt supply.

8. Stable weathering performance, suited to harsh northern climatesFormulation optimised for severe northern conditions: bitter cold, high heat, rain, snow and frost cycles. It delivers outstanding frost resistance, waterproofing and anti-ageing properties, remaining crack-free and non-absorbent under long-term outdoor exposure with sustained insulation performance.

4. Main Application Scenarios

1. External walls for civil buildings: external wall insulation and fire protection works for high-rise residential estates, villas and apartments;

2. Energy-saving retrofits of aged residential blocks: façade renovation and insulation upgrades, especially suitable for load-restricted refurbishment projects;

3. Public buildings: external wall insulation and fire barrier works for schools, hospitals, office blocks and shopping complexes;

4. Industrial buildings: external wall and roof insulation and fire protection systems for steel-framed factories, warehouses and workshops;

5. Prefabricated buildings, lightweight steel villas and curtain wall envelope thermal and acoustic insulation systems.

5. Haochen Production Strength & Product Advantages

1. Manufactured at solid production facility, full quality control at sourceHaochen is a specialist manufacturer of external wall insulation panels, equipped with standardised workshops and fully automatic integrated composite production lines. All processes, from basalt raw material screening, polyurethane bonding, panel pressing to finished curing, are completed in-house as one continuous forming process, with no OEM or white-labelling. Production processes are fully controlled end-to-end to guarantee consistent density, flatness and bonding strength on every panel. Product quality surpasses goods sourced from resellers and intermediaries.

2. Stringent quality control, high finished accuracy and stable performanceFinished products achieve near-zero measured tolerance. Mass production follows standardised procedures. Every batch undergoes flatness inspection, dimensional verification, bond strength testing and hydrophobic sampling inspection. Tight tolerances of ±2mm thickness and ±5mm length are enforced, eliminating defects including warping, deformation, inconsistent thickness and interlayer debonding at production stage. The panels feature excellent forming and durability, with consistent quality across batches, suited to high-specification external wall construction projects.

3. Ample stock reserves, stable and efficient supplyLarge stocks of standard-size finished panels are maintained year-round, removing lengthy lead times for production. Urgent site material demands can be met quickly. Goods are dispatched locally within the Beijing-Tianjin-Hebei region for fast delivery. Orders ship promptly to maintain continuous construction progress and avoid site shutdown and programme delays due to material shortages.

4. High production capacity plus custom manufacturing for diverse projectsFully automatic production lines deliver abundant capacity, reliably fulfilling bulk site orders with high output and stable scheduling. Bespoke cutting, non-standard thickness and density customisation are available. Panel parameters can be matched to project construction methodology and façade structure, suitable for new-build, retrofit and prefabricated external wall projects.

5. Product formulation tailored for harsh northern operating conditionsHigh-performance hydrophobic weather-resistant lightweight rock wool composite panels are held permanently in stock. Formulation optimised for northern outdoor operating conditions: extreme cold, high heat, rainfall, frost, strong wind and solar exposure. Panels feature enhanced waterproofing, frost resistance and anti-ageing characteristics. No cracking, water absorption or performance degradation after long-term outdoor service, suitable for year-round external wall insulation installation and long-term operation in northern regions.