Shenyang Qiangyun Color Steel & Steel Structure Co., Ltd. is one of the most reliable manufacturers and suppliers of polyethylene sandwich panels in China. With abundant experience, we are committed to providing high quality customized products with competitive price. Welcome to wholesale advanced polyethylene sandwich panels in stock here from our factory. Also, pricelist is available.

Product Introduction

North America leads the market due to increasing building energy retrofit demands and old-house renovation programs. The Asia-Pacific region is the fastest-growing market driven by rapid industrialization. European demand continues to rise, propelled by stringent building energy efficiency regulations such as EPBD and the Energy Performance of Buildings Directive.

Technical Specifications

Parameter	Specification
Product Name	PU Sandwich Roof Panel
Surface Material	Premium PPGI/PPGL color-coated steel sheet, hot-dip galvanized steel sheet, aluminum sheet (optional)
Core Material	High-density rigid closed-cell polyurethane foam (PUF), CFC-free N-pentane blowing agent
Panel Thickness	30mm / 50mm / 75mm / 100mm / 150mm / 200mm (custom sizes available)
Sheet Thickness	0.3mm - 0.8mm (fully customizable)
Width	950mm / 1000mm (custom width available)
Length	Customized according to on-site requirements (up to 18m)
PU Core Density	38-43 kg/m3 (standard); 45-50 kg/m3 (heavy-duty option)
Thermal Conductivity	0.022-0.024 W/(m.K) (ultra-low heat transfer)
Water Absorption Rate	<=1.5% (excellent waterproof performance)
Fire Resistance	B1 Class (per EN 13501-1) / Class 2 (per ASTM E84), self-extinguishing
Connection Structure	Precision tongue-and-groove splicing (hidden fastener system)
Load Bearing Capacity	>=2.5 kN/m2 (varies with thickness and support spacing)
Wind Pressure Resistance	>=1,200 Pa (tested per EN 13056)
Rainwater Tightness	IPX4 rated
Working Temperature	-50 deg.C to +150 deg.C
Sound Insulation	>=35 dB
Color Options	White, light gray, sky blue, brick red, and full RAL color customization
Coating Type	PE / SMP / HDP / PVDF (superior weatherability options available)
Service Lifespan	20-25 years under normal conditions
Edge Connection	Hidden fastener / tongue-and-groove / male-female groove

About QY Building Materials Group

Established in 2010, QY Building Materials Group is a leading manufacturer of insulated sandwich panels with 15+ years of industry experience. Our 15,000 sqm modern factory in Liaoning Province, China, operates fully automated continuous production lines with an daily output capacity of 20,000 sqm. We have successfully delivered 2,500+ projects across 35+ countries including the USA, Canada, UK, Germany, Australia, Vietnam, Thailand, Indonesia, Philippines, Saudi Arabia, UAE, and more.
We serve general contractors, construction companies, cold chain operators, and prefabricated building developers worldwide, providing end-to-end solutions from product selection to after-sales support.

How to choose the panels as the thickness?

Color Customization

Select from white, light gray, sky blue and brick red for industrial and export applications. Full RAL customization supports accurate color matching to meet the technical specifications of architects. We also offer customization for other requirements: Galvanized/Galvalume surfaces, flat or corrugated panels, full RAL color options, and standard PU or PIR cores sorted by fire grade.

Certifications & Quality Assurance

Our PU sandwich wall panels hold full ISO certifications for quality, environment, occupational health and energy management. Steel substrates comply with EN standards, supplying compliant building envelopes worldwide.

Project Reference

This cold-chain logistics warehouse in Thailand installed our PU sandwich roof panels with a total area of 12,500 m², and the project was completed in 2023. Engineered for tropical high-temperature and high-humidity environments, our PU roof panels offer ultra-low thermal conductivity and reliable waterproof interlocking joints. They maintain a consistently stable low temperature inside the cold storage while effectively reducing refrigeration energy consumption. This panel system has passed inspections in compliance with local building codes, making it an ideal roofing solution for large-span cold storage facilities.

Why Choose QY

Advantage	Data-Supported Claim
Thermal Insulation	Ultra-low thermal conductivity - reduces AC energy consumption by 15-25%
Lightweight & High Strength	Only 8-14 kg/m2 - reduces structural load, no heavy lifting equipment needed
Fire Safety	B1/Class 2 rated - self-extinguishing, low smoke, no toxic drip
Waterproof	Water absorption <=1.5% - no water infiltration, suitable for tropical climates
Fast Installation	Hidden fastener / tongue-and-groove system - installation speed 60%+ faster
Wind Resistance	>=1,200 Pa wind pressure resistance - suitable for typhoon/hurricane-prone regions
Sound Insulation	>=30 dB - creates quiet indoor environment
Long Lifespan	20-25 years service life - salt spray test 2,000 hours, no corrosion
Customization	Full RAL colors, custom lengths up to 18m, multiple coating options

Application Scenarios by Climate Zone

Climate Zone	Recommended Thickness	Key Feature
Tropical (SE Asia, Middle East)	60mm - 100mm	High heat reflection, waterproof, corrosion resistant
Temperate (Europe, North America)	50mm - 80mm	Energy efficient, meets EPBD/IECC standards
Arid/Hot Desert (GCC Countries)	100mm - 150mm	Maximum insulation, UV resistant PVDF coating
Cold Climate (Northern Europe, Canada)	100mm - 250mm	Ultra-low thermal conductivity, frost resistant
Industrial/Warehouse (Global)	50mm - 100mm	Fast installation, cost-effective, load bearing
Cold Storage (Global)	150mm - 250mm	Superior insulation, energy saving, moisture proof

Project Solution Capability

Roof/Wall Envelope System Solutions: Complete panel system design including structural calculation and waterproofing details
Energy Retrofit Solutions: Upgrading existing structures with high-performance insulation to meet modern energy codes
Prefabricated Building Total Solutions: End-to-end supply for modular/prefab construction projects
Cold Chain & Cleanroom Solutions: Specialized insulation for cold storage and temperature-controlled logistics
Custom Engineering Solutions: Tailored panel specifications, colors, and connection methods

Packaging & Logistics

Professional export packaging: moisture-proof wrapping, corner protection, wooden pallet reinforcement, and stretch film wrapping. Suitable for all transport modes (sea freight, air freight, express). FCL and LCL both accepted. Complete export documentation provided.
Container Loading: 20GP = 22-26 sqm; 40HQ = 58-62 sqm (varies with thickness)