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

Key Advantages

Advantage	Benefit for the Buyer
Snow-load stiffness	Corrugated profile and bonded core resist point and drifted snow loads without permanent set
Sealed, thermally broken lap	PU-filled joint stops ice forming on the underside - no condensation dripping onto product
Reaction to fire	A2-s1,d0 per EN 13501-1 for the rock wool build-up; thickness-dependent
Single-run panels	Up to 11.9 m removes transverse joints, so there is no lap for meltwater to find
Cold-region service record	20-25 year service life; core does not age, rot or settle at low temperature
Winter erection	Pre-cut, pre-drilled and pallet-capped so the roof can be closed from above in short daylight

Technical Specifications

Parameter	Specification
Product Name	Polyurethane Sandwich Puf Panels Roof
Material	Non-combustible rock wool core + closed-cell PU edge seal, between two metal faces
Surface Material	PPGI/PPGL, galvanized, Galvalume, optional Al/stainless
Core Material	Mineral rock wool to EN 13162; rigid PU only in the edge seal zone
Panel Thickness	30 / 50 / 75 / 100 / 120 / 150 / 200 mm - 100 mm and up for cold zones
Sheet Thickness	0.3–0.8 mm
Width	950 / 1000 mm (custom available)
Length	Cut to drawing, maximum 11.9 m for a 40HQ container
Core / Edge-Seal Density	Rock wool 100-150 kg/m³; PU edge seal 38-43 kg/m³
Thermal Conductivity	Rock wool core 0.036-0.040 W/(m·K); PU edge seal 0.022-0.024 W/(m·K)
Water Absorption	≤ 1.5%
Reaction to Fire	Euroclass A2-s1,d0 per EN 13501-1 (rock wool build-up); full PIR core B-s1,d0 - verify per thickness
Connection	Concealed-fixed corrugated / tongue-and-groove, sealed
Custom Colors	White, light grey, sky blue, brick red, plus the full RAL chart
Applications	Heated industrial halls, logistics terminals, cold stores in cold and continental climates
Service Lifespan	20-25 years with routine coating and drainage maintenance
Brand	QY
Place of Origin	Liaoning, China

Performance Parameters

Property	Value / Rating
Reaction to Fire	Euroclass A2-s1,d0 - EN 13501-1; classification is thickness-dependent, report supplied
Core Thermal Conductivity (lambda)	0.036-0.040 W/(m·K) to EN 12667
Indicative U-value (core only)	0.40 W/(m²·K) at 100 mm; 0.27 at 150 mm; 0.20 at 200 mm - add 5-10% for bridging
Edge-Seal Density / Cells	38-43 kg/m³, closed-cell ratio >= 90%
Water Absorption	<= 1.5%; mineral core does not wick if the cut edge is sealed
Service Temperature	-40 °C to +80 °C
Service Lifespan	20-25 years in cold-region exposure with normal maintenance
Connection	Concealed-fixed corrugated lap or tongue-and-groove, PU-sealed

Thickness & Core Options

Pick thickness against your design outdoor temperature, not against habit. Working from lambda = 0.040 W/(m·K), core-only U-values are roughly 0.53 W/(m²·K) at 75 mm, 0.40 at 100 mm, 0.33 at 120 mm, 0.27 at 150 mm and 0.20 at 200 mm - add 5-10% for joint and fastener bridging before you compare to a code limit. In practice our cold-climate orders run 100 mm for ambient warehouses, 150 mm for heated production halls and 200 mm where a freezer or a strict energy target sets the number.

Thickness (mm)	Typical Cold-Climate Application
80 mm	Unheated canopies, shelters and cold porches
100 mm	Ambient warehouses and logistics halls in temperate zones
120 mm	Heated production buildings where a code U-value applies
150 mm	Heated halls in continental winter climates; low-temperature stores
200 mm	Freezers and blast freezers; the practical ceiling before cost outweighs benefit
Design note	Figures are core-only U-values at lambda 0.040; add 5-10% for joints and fixings

Surface Material & Coating Options

Option	Cold-climate note
PPGI / PPGL pre-painted steel	General purpose; specify a higher coating mass where winter grit abrasion is expected
Hot-dip galvanized steel	Reliable base where meltwater sits on the roof for long periods
Galvalume (aluminium-zinc)	Preferred wherever de-icing salt or coastal air reaches the roof
Aluminium / stainless steel	Available for aggressive industrial atmospheres on request
Coating	PVDF or SMP for UV and freeze-thaw; PE only where the face is fully internal

Color & Customization

White, light grey, sky blue and brick red are stocked, with full RAL matching available. Colour is worth thinking about in a cold climate: a darker face absorbs what little winter sun there is, which helps melt snow off the roof but also raises summer surface temperature. Tell us which effect you want to optimise and we will quote reflectance figures rather than guessing at it.

Application Scenarios

Engineered primarily for cold-region duty: heated factories and assembly halls where every kilowatt of heat loss costs money, logistics terminals with snow accumulation on large clear spans, cold stores and freezers, and any steel structure where shedding roof dead load lets the frame get lighter. The same panel is used further south, but this is the specification we would defend in a Russian winter.

Representative Project Reference

Kazakhstan refrigerated distribution terminal near Almaty, 9,400 m², delivered 2022. The design brief called for a minus 25 °C store inside a shell exposed to minus 34 °C design temperature, on a 6 m purlin grid with a drifted snow load that ruled out a lightweight panel. We supplied 200 mm panels on Galvalume faces with PVDF coating and froze-proofed gaskets; the PU-filled laps were specified specifically to stop the ice build-up that had made the client's previous flat-lap roof leak every spring thaw. Panels were cut to full slope length so no transverse joint existed on the roof. Two years on the client reports no roof leaks and stable refrigeration load. Treat the figures as indicative and ask us for the delivery records and coil certificates if you want to verify them.

Customization & OEM Service

Length up to 11.9 m so a full roof slope is one panel with no transverse joint to leak or ice up; widths of 950 / 1000 / 1150 mm; thickness 30-200 mm; density, steel grade and face profile configurable. We ship matching ridges, flashings, seal strips and cold-rated fasteners so one order covers the weatherproofing, and we will size the fixing centres against your snow load rather than leaving it to the installer.

Certifications & Compliance

Documentation is prepared for the standards the reviewing authority will actually cite: EN 13501-1 reaction-to-fire classification for the build-up ordered, EN 13162 for the mineral wool core, EN 14509 for the self-supporting panel assembly, and thermal conductivity to EN 12667. Where a project runs on Russian GOST or EAEU technical regulation instead, we supply the declarations and protocols in the format required and confirm which items are covered by test evidence. Production is audited to ISO 9001, ISO 14001 and ISO 45001, and the mill certificates for every coil are released with the shipment.

Manufacturing Strength & Quality Control

Export experience: shipping since 2010 into Russia, Kazakhstan and Uzbekistan as well as Southeast Asia and the Middle East, including winter delivery programmes staged ahead of port closure.
Plant and capacity: a 15,000 m² works running 26 lines at roughly 20,000 m² per day, which puts a container programme inside a predictable slot rather than a queue.
Input control: coil certificates are checked for yield strength and coating mass; rock wool is verified for density and declared lambda. No reclaimed filler enters the core - winter claims about slumped insulation almost always trace back to someone else doing that.
Process checks: bond strength is tested to failure on samples from every shift, along with length tolerance, panel flatness and core integrity; low-temperature bond behaviour is verified for cold-region orders.
Cold-climate packing: pallets are stretch-wrapped and capped so cores cannot pick up moisture in transit or in open storage before installation - the failure mode that causes most winter delamination claims.
Engineering support: we will run the snow load and span check with you, confirm achievable U-values in writing, and quote within one working day including documents for customs.

Lead Time, MOQ & Trade Terms

Item	Detail
Lead Time	Samples: 2 working days. Stock sizes: 5-7 days up to 5,000 m². Programme volumes of 10,000-50,000 m²: 7-15 days. Bespoke profile or coating: 10-18 days once drawings are signed off.
Minimum Order	1 m² for samples; a 20GP container is the sensible minimum once freight is counted
Trade Terms	FOB / CIF / CFR / DDP / EXW under Incoterms 2020; rail and road options into Central Asia
Payment	T/T or L/C at sight, terms stated on the proforma invoice
Winter Packing	Stretch-wrapped and capped pallets, fumigated timber, moisture indicator in each container

Company Profile

Send us your design snow load, winter design temperature, span and target U-value and we will come back with a thickness, a purlin spacing check and a loaded quotation - normally within one working day. Shenyang Qiangyun has built insulated sandwich panels since 2010; the 15,000 m² Liaoning plant runs 26 lines at about 20,000 m² per day and ships from Dalian, Tianjin and Yingkou, which keeps the rail and sea route into Russia short. Test reports, samples and export documentation ship with any serious enquiry.

FAQ

Q1: What are your production & QC advantages?

A: Auto one-piece molding ensures consistent batch quality. Third-party inspection available; layered QC reduces after-sales issues.

Q2: How does concealed lap solve leakage risks?

A: Corrugated concealed laps outperform flat panels in waterproofing and wind resistance, avoiding exposed fastener leaks.

Q3: What is the outdoor service life?

A: Acid & alkali resistant coating delivers 20+ years outdoor lifespan, better value than single steel sheets or roof tiles.

Q4: Why for Russia & Central Asia?

A: Reinforced structure supports low-temperature operation and heavy snow load for freezing winter conditions.

Q5: Why for South America?

A: Anti-corrosion coating resists coastal humidity and salt spray to slow marine atmospheric corrosion.

Related Sandwich Panel Products

Two choices usually decide this. If the building is heated and the energy target is tight, PIR gives the lowest lambda per millimetre and lets you use a thinner panel - at Euroclass B-s1,d0, so check whether your fire review accepts it. If the fire officer or insurer drives the decision, the rock wool core here is non-combustible and that argument ends early. EPS is cheaper per square metre but it loses thickness over time and it melts. We make all of them and will quote whichever suits your building rather than whichever suits our margin.