Your Trusted Roof Tiles Manufacturers
Your Trusted Roof Tiles Manufacturers
At Duolong Trade, we specialize in manufacturing a wide range of export-grade roof tiles for industrial, residential, and infrastructure use. With over 10 years of experience serving B2B buyers across Southeast Asia, the Middle East, and Africa, we supply building material wholesalers, cross-border importers, construction contractors, and project-based procurement teams with dependable and cost-effective roofing solutions. Our product portfolio is engineered to meet the demands of harsh climates, government building standards, and fast-paced construction schedules.
We offer multiple roof tile product lines, each designed for different application and climate needs. These include ASA coated PVC roof tiles for coastal and high-humidity projects, synthetic resin Roman-style tiles for visually appealing public housing and institutional buildings, trapezoidal roof sheets for commercial sheds and efficient water drainage, flat PVC roofing panels for warehouse and factory coverage, and hollow heat-insulated roof panels for regions requiring thermal protection. All models come with optional accessories such as ridge caps, trims, and edge finishes for complete installation.
Duolong’s roof tiles are manufactured in our ISO 9001:2015-certified factory using automated extrusion and ASA co-extrusion technology to ensure color consistency, high tensile strength, and impact resistance. We implement strict dimensional and surface quality controls, and our tiles comply with CE, SGS, and region-specific certifications, covering UV resistance, load-bearing performance, waterproofing, and flame retardance. Every batch is tested for profile accuracy, material thickness, and heat distortion thresholds to meet international export requirements.
To support global procurement workflows, Duolong offers flexible shipment solutions — including mixed-model loading, short lead times, and custom carton packaging. For cross-border or government-related tenders, we supply all export documentation such as technical spec sheets, quality inspection reports, HS code declarations, and packing lists. OEM and private label manufacturing is fully supported with options for logo embossing, custom color palettes, and project-specific dimensions.
Working with Duolong Trade means partnering with a manufacturer that understands the operational complexity behind high-volume sourcing, multi-country distribution, and compliance-driven purchasing. We help our clients maintain project schedules, manage inventory cycles, and improve cost control with a stable supply of certified roof tiles at factory-direct prices. Whether you are building public schools, managing regional wholesale supply, or importing for private label retail, Duolong delivers on performance, consistency, and long-term reliability.
ASA Coated PVC Roof Tiles
Synthetic Resin Roof Tiles
Roman Style Roof Tiles
Hollow Heat-Insulated Roof Panels
Why Choose Us
Complete In-House Production
Duolong Trade manages the full production of our roof tiles—from PVC material blending, ASA or synthetic coating, to precision extrusion and final palletization. All operations take place in-house under ISO 9001:2015 quality systems, ensuring consistent sizing, color retention, and profile accuracy for both standard and custom orders.
Weather-Resistant Materials
Our tiles are engineered for use in high-UV, high-moisture, and corrosion-prone environments. Whether it's synthetic resin Roman tiles, flat PVC panels, or trapezoidal roof sheets, each product is tested for long-term color stability, water resistance, and structural strength. Proven in coastal projects across Southeast Asia and Africa.
Profile and Color Customization
We offer various roof tile types including ASA corrugated sheets, Roman-style panels, and insulated hollow boards. All can be adjusted by length, wave type, thickness, and RAL color tone. OEM customization includes logo embossing, printed cartons, and barcode-ready pallet packing for wholesale or retail buyers.
Efficient Export Logistics
Each shipment is reinforced with shrink wrap, edge boards, and moisture barriers. We support both full container and mixed-type shipments, with labeled cartons and accurate HS codes for smooth customs clearance at ports such as Jakarta, Durban, and Manila. Normal lead time is 10–14 working days.
Straightforward Installation Tools
Every shipment comes with detailed installation instructions covering overlap, purlin spacing, and fastener alignment. For bulk buyers and contractors, we also provide printed guides and digital manuals to reduce labor time and improve on-site efficiency for mass-scale installations.
Certifications and Testing
Our roof tiles are verified with CE, SGS, and ISO documentation and pass tests for UV resistance, water tightness, impact durability, and heat performance. Each shipment is backed by technical sheets, MSDS files, and test reports for use in regulated markets and public sector contracts.
Your Ideal Choice
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Proven in Global Construction
Duolong’s roof tiles have been selected by importers and project buyers operating in UV-intense, high-moisture, and corrosive coastal zones. Our ASA PVC, synthetic resin, and insulated panels have been installed in solar-powered warehouse roofs in Kenya, open-air market shelters in Vietnam, and school buildings in the Philippines. With a weather-resistant core and anti-fade surface, the tiles maintain their structural integrity and color vibrancy under prolonged tropical exposure. - Tailored Roof Tile Categories We provide a complete product range to support infrastructure and commercial development: ASA corrugated PVC roof sheets for factory sheds, Roman-style roof tiles for civic buildings and decorative use, trapezoidal panels for drainage-focused design, and hollow heat-insulating tiles for thermally sensitive zones. All formats match standard structural frameworks used by contractors and distributors across Southeast Asia, Africa, and MENA markets.
- OEM Support for Distributors Duolong enables both private label production and standardized wholesale output. Services include color tone customization, packaging design, length and profile adjustments, and on-tile branding. Whether fulfilling 2.5mm flat PVC panels for retail channels or thicker, impact-resistant tiles for institutional bids, our team aligns each order with local sizing norms and resale requirements.
- Certified Manufacturing Practice All roofing tiles are produced in-house under ISO 9001:2015 systems and validated by CE and SGS test protocols. We use recyclable PVC and low-emission ASA resin to support compliance with environmental codes and construction standards required in public tenders, school facility upgrades, and commercial procurement across regulated regions.
- Transport-Safe and Labor-Saving Our roof tiles are pallet-packed with anti-friction materials, edge protectors, and moisture-resistant wrap. Product shapes are designed for quick overlapping, fastener positioning, and seamless purlin alignment—ensuring easy assembly by local construction crews and reducing on-site man-hours during peak building seasons.
- Supply Confidence for Large Orders With stock available across core product lines, we support flexible shipment sizes including split loads, part deliveries, and rolling monthly supplies. Whether you're staging materials for a national housing plan or resupplying a wholesale tile program, Duolong maintains production stability, order visibility, and just-in-time delivery for high-efficiency fulfillment.
FAQ Questions and Answers
Duolong offers a complete line of roof tiles for export and project use, including ASA coated PVC corrugated roof sheets, Roman-style synthetic resin tiles, trapezoidal PVC roofing panels, and hollow insulated roofing boards. These products are widely used in logistics warehouses, school buildings, public shelters, and government-funded housing across Southeast Asia, Africa, and the Middle East. Standard widths include 840mm, 880mm, and 1050mm, with thickness options from 1.5mm to 3.0mm.
Yes. All roof tiles are produced in our ISO 9001:2015 certified facility and comply with CE, SGS, and additional regional certifications such as SONCAP (Nigeria), SIRIM (Malaysia), and QCVN (Vietnam). We provide complete export documentation, including Certificate of Origin, MSDS, inspection reports, and weather/fire performance tests—meeting the requirements for infrastructure tenders and regulated import markets.
Our roof tiles are engineered for long-term exposure in extreme environments. The ASA resin coating protects against UV degradation, fading, and salt corrosion, while the PVC or resin core offers structural integrity and impact resistance. Our tiles have been installed in poultry farms in Indonesia, schools in Ghana, and public housing near coastal Kenya with consistent performance results.
Yes. We support full OEM and private label services across all roof tile categories. Customizations include Pantone color matching, embossed branding, non-standard lengths or profiles, and packaging tailored for distributor barcoding or public bidding. Whether you’re sourcing Roman roof tiles for civic projects or flat PVC sheets for private retail, we align output with your exact specifications.
Standard lead time is 10–15 working days for regular orders and 15–20 days for fully customized items. High-volume formats like ASA corrugated sheets and Roman tiles are stocked for faster dispatch. Shipments depart via Qingdao, Ningbo, or Shanghai, packed with moisture-block film, reinforced edge guards, and stretch-wrapped pallets to ensure safe delivery.
Absolutely. Duolong’s roofing materials are used in schools, rural clinics, community shelters, and infrastructure maintenance programs. We support public sector buyers with documentation including wind uplift reports, fire resistance tests, and installation instructions. Our tile profiles are also compliant with standard spacing and fastener systems used in public works projects.
We issue all standard documents: commercial invoice, packing list, bill of lading, Certificate of Origin, and SGS or third-party inspection reports as required. For buyers managing multiple locations or part-load deliveries, we offer LCL/FCL coordination, customized container loading layouts, and photo-verification of packing before shipment.
Duolong’s monthly production capacity exceeds 400,000 square meters, covering all major profiles from ASA PVC tiles to synthetic Roman and insulated hollow formats. We support rolling delivery contracts, phased shipment schedules, and multi-destination dispatch programs. Each batch is color-matched and thickness-verified for consistency.
Compared with metal sheets, our PVC and resin tiles are lightweight, corrosion-proof, and quieter in heavy rain. They outperform clay tiles in impact resistance, installation speed, and moisture control. For fast-moving builds and humid climates, ASA roof tiles provide superior UV resistance, thermal comfort, and design flexibility.
Yes. We provide physical samples of corrugated roof tiles, Roman tile profiles, color options, and fitting accessories. Alongside samples, we include full specification sheets, test reports, and installation guides. Samples can be dispatched via international express within 3–5 business days to support approval and bidding processes.
Shipping & Logistics
We ensure seamless delivery of your goods worldwide
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Order Confirmation
With your approval of the design and specifications, we proceed to confirm the order and prepare for mass production. This step ensures your final approval of the product. -
Mass Production
The manufacturing process typically lasts about 30 days, depending on the complexity and volume of the order. We maintain strict adherence to quality standards. -
Shipping
Following production, we manage the logistics of shipping your order. Shipping times vary depending on the selected method -
Goods Received
Once your tiles and building materials arrive, they are ready for distribution and immediate use, fully incorporating all specified customizations and branding as agreed upon. We remain flexible to accommodate any unforeseen circumstances, ensuring a smooth process from delivery to application.
Your Trusted Roof Tiles Manufacturers
Table of Contents
Bulk Pricing Advantages for Roof Tile Buyers
Stable Price Offers for High-Volume Sourcing Duolong provides structured pricing tailored to building materials distributors, government project suppliers, and cross-border importers managing container-based or phased project procurement. Our pricing system for PVC roof tiles, Roman profile synthetic tiles, and ASA-coated corrugated panels remains stable against short-term market volatility. This allows buyers to secure accurate budget planning, align tender documents, and manage cost across extended delivery timelines.
Standardized Product Range for Efficient Quoting We quote based on a fixed set of specifications—such as 840mm ASA corrugated roof tiles, 1050mm trapezoidal roof panels, and 880mm Roman profile resin tiles. Thickness grades from 2.0mm to 3.0mm are available across formats, all CE-certified. This structure enables fast turnaround on RFQs, minimizes miscommunication in reorders, and allows volume-tier discounts to be applied uniformly across repeat projects.
Forward Price Commitments for Government Projects For public infrastructure buyers—especially those involved in school refurbishment, rural housing, or health facility roofing—we offer forward pricing contracts valid for 60–120 days. This ensures your BOQ submissions and municipal approvals align with guaranteed square meter costs. Fixed-rate agreements help avoid last-minute re-quotes during fiscal-year-bound spending.
Optimized Container Loading to Lower Freight Cost per Unit Our export team maximizes per-container efficiency by standardizing tile stacking, color grouping, and pallet height across ASA and PVC roof tile types. This reduces empty space inside 20GP/40HC containers and minimizes in-transit vibration or edge loss. We help buyers reduce their landed cost per m² and support EXW, FOB, and CIF terms with full export documentation—packing lists, HS codes, CE/SGS test reports included.
Production Lead Matching for Phased Construction Supply We align production cycles with your rollout strategy—whether delivering ASA trapezoidal panels to housing sites in Nairobi or scheduling Roman roof tiles for monthly dispatch to logistics hubs in Southeast Asia. Pre-booked slots ensure color consistency and delivery alignment across ports such as Port Klang, Tema, or Ho Chi Minh City. Batch tracking and split-location pallet tagging are standard.
A Cost Structure Designed for Operational Reliability At Duolong, our pricing is built around your field execution—not just your order confirmation. You receive predictable, scalable, and technically backed pricing terms across roof tile types—whether synthetic resin Roman profiles, hollow insulated boards, or flat PVC sheets. Each quotation is supported by delivery planning, profile accuracy, and compliance for both government submission and cross-border distribution.
Consistent Product Specifications for Roof Tile Orders
Fixed Mold Profiles Ensure Uniform Fitment Across Projects Duolong manufactures PVC roof tiles using locked-in extrusion tooling and calibrated die profiles across all standard models, including 840mm ASA corrugated tiles, 1050mm trapezoidal panels, and 880mm Roman-style synthetic resin tiles. Each format is extruded to exact pitch, thickness, and crest specifications—ensuring repeatable fitment without adjustments. For contractors and distributors working on phased school roofing, warehouse zones, or public clinics, this means no field resizing, no panel mismatch, and consistent on-site layout.
Color Batch Matching Maintains Visual Uniformity We use digitally controlled ASA co-extrusion lines to blend pigment ratios in every roof tile batch. Common regional shades such as grey, red, and ocean blue are produced with minimal variation between weeks or container cycles. Whether you’re installing Roman tiles on housing clusters or corrugated panels on public terminals, visual consistency is maintained across roofs, buildings, and phases.
Traceable Palletization Improves Warehouse Flow and Customs Handling Every batch is pallet-packed with profile ID, production date, thickness class, and color label. This traceability supports customs compliance, bonded zone unloading, and in-country warehouse management. For importers handling multi-format orders or distributors operating across provincial networks, this improves supply flow, stock tracking, and regional order fulfillment.
Material Inputs Verified for Structural and UV Performance All roof tiles are manufactured from virgin-grade PVC granules with ASA coating and fire-retardant, anti-aging agents. Our extrusion lines integrate inline scanners to monitor tile thickness, wave accuracy, and bonding integrity. There is no distortion, warping, or deformed edges—critical for infrastructure buyers requiring performance warranties, inspection pass rates, or compliance with housing construction codes.
Standard Specs for Fast Quoting and Reordering We operate with a catalog of locked technical specifications. Buyers sourcing ASA corrugated roof sheets or trapezoidal tiles can request quotes by profile code, ensuring accurate pricing and reorder efficiency. This benefits clients supplying government projects, school roofing programs, or retail roofing materials under long-term framework agreements.
Certified Manufacturing for Tender and Compliance Submission Duolong’s roof tiles comply with ISO 9001:2015 standards and are verified by CE and SGS third-party testing. Certifications cover load-bearing, thermal expansion, UV resistance, and weather cycle testing. All files—technical sheets, test results, MSDS, and inspection reports—are ready for inclusion in tender submissions, municipal bidding folders, or public sector procurement packages.
Installation Efficiency from Batch-to-Batch Consistency Each production batch mirrors the last in dimension, thickness, and edge shape. Contractors don’t waste time rechecking overlaps or realigning tile runs. For B2B buyers managing multi-location projects or staggered rollout plans, our product repeatability translates into smoother installation, lower labor costs, and reduced error on government, industrial, and institutional sites.
Long-Term Partnership Support for Roof Tile Supply
Structured Supply Chains for Repeat Orders and Regional Distribution Duolong supports high-frequency buyers with an export model designed for long-term stability. Whether you are managing ASA PVC roof tile distribution to inland warehouses or scheduling split shipments of Roman-profile synthetic resin roof tiles to government job sites, our production planning ensures alignment with your recurring delivery needs. We coordinate order batching and loading schedules to match contractor execution timelines and multi-phase project rollouts.
Reserved Output for High-Turnover Roof Tile Specifications We offer fixed-capacity reservations and forward pricing for core roof tile formats, including 840mm ASA corrugated roof panels, 1050mm trapezoidal ASA-PVC tiles, and custom-length dual-layer composite sheets. These terms reduce raw material fluctuation impact and allow procurement managers to plan cost structures across public infrastructure projects, export programs, and regional construction mandates.
Dedicated Export Coordination Across All Delivery Stages Each long-term client works with an assigned export coordinator to manage quotation timing, documentation preparation, and container dispatch. From CE certificate collation to pallet barcode labeling and port-based shipment tracking, our team ensures your PVC roofing tiles move smoothly through customs and into regional stock or direct-use projects with zero delay.
Production Aligned to Fiscal-Year Procurement Schedules We understand how institutional buyers operate under fixed annual budgets and tender windows. Our manufacturing is scheduled with visibility on tender results, budget releases, and forecasted site start dates—ensuring ASA coated roof tile stock is available on your timeline. Advance resin allocation, die-line holdover, and pre-marked inventory allow seamless deployment during busy procurement cycles.
Export Logistics Designed for Multi-Market Dispatch Efficiency For importers distributing to multiple countries or regional drop points, Duolong offers optimized stacking schemes, mixed-SKU pallet plans, and container separation based on product profile and volume. Whether you’re supplying bonded warehouses in Africa or drop-shipping to Southeast Asian port zones, we support route-based coordination for cost control and port clearance optimization.
Exclusive Access to Technical Upgrades and New Roofing Profiles Our long-term clients receive early access to next-generation roof tile models including heat-reflective ASA PVC panels, high-thickness profiles for industrial roofing, and updated Roman tile variants for civic architecture. We offer technical documentation, cross-section samples, and product testing kits to support your in-country product registration, presentation to architects, and government approval submissions.
Consistency and Certification for Public and Professional Buyers With Duolong, you gain a production partner—not just a vendor. All ASA PVC and synthetic resin roof tiles are backed by ISO 9001:2015 certification, SGS testing, and CE documentation. Batch traceability, color uniformity, and mold-specific profile accuracy are maintained across orders. Whether you’re fulfilling tenders, national housing programs, or multi-year building frameworks, we deliver manufacturing certainty you can plan around.
How Roof Tiles Help Reduce Construction Costs
Lightweight Roof Tiles Reduce Steel and Concrete Use Compared to concrete roofing or clay tiles, our ASA coated PVC roof tiles are significantly lighter—ideal for low-rise public housing, logistics warehouses, and agricultural sheds. Lighter roofing materials reduce structural load, allowing engineers to design lighter steel subframes and smaller foundation pads. On average, our clients report a 15–25% drop in steel reinforcement and truss costs when switching to corrugated ASA roof sheets or trapezoidal PVC roofing panels.
Durable Surface Reduces Maintenance and Replacement Costs Each tile features a UV-resistant ASA outer layer and a flexible PVC base that resists corrosion, cracking, and deformation. In regions with high rainfall, salt-laden air, or intense sun, our ASA PVC roofing panels outperform metal and ceramic alternatives—eliminating the need for anti-rust coatings, repainting, or early re-roofing. This is especially valuable for schools, clinics, or storage buildings located in coastal or inland tropical zones.
Standard Profiles Save Time and Labor During Installation Duolong manufactures all roofing formats—including 840mm ASA corrugated panels and 1050mm trapezoidal roof tiles—using fixed-profile molds with consistent wave pitch, edge spacing, and alignment points. This allows faster roof layout, fewer measurement adjustments, and more predictable fitment. For government contracts or private developments working under labor constraints, installation time is reduced by up to 30% compared to traditional roofing systems.
Protective Packaging Reduces Tile Damage and Material Waste Our shipments are packed using moisture-block wrap, reinforced corners, and stable pallets that absorb inland transport impact. Unlike fragile ceramic or fiber cement tiles, our PVC roof tiles flex during handling and resist cracking in transit. This lowers breakage rates at the jobsite, reducing reordering needs, insurance claims, and unexpected delays in remote or multi-country delivery scenarios.
Thermal and Acoustic Benefits Improve Operational Efficiency The ASA-PVC structure provides natural resistance to heat penetration and outdoor noise. On school roofs, livestock facilities, or market stalls, this lowers reliance on extra insulation or ventilation systems—cutting air-conditioning electricity use and improving interior comfort. Over the lifespan of the building, this delivers measurable reductions in energy bills and maintenance overhead.
Cost-Efficient from Production to Project Completion Every element of our PVC and ASA coated roof tile system is built for lifecycle savings—from factory calibration to container optimization. Contractors save on frame design, labor, and post-installation care, while importers benefit from high packing density and reduced damage claims. Whether you’re supplying Roman roof tiles for civic housing or corrugated panels for warehouse builds, Duolong helps you reduce cost per square meter—without sacrificing quality or delivery control.
Ensuring Smooth Customs Clearance and Compliance
Export-Compliant Shipments for International Roof Tile Buyers Duolong delivers export-ready shipments of ASA coated PVC roof tiles to buyers across Africa, Southeast Asia, and the Middle East. Whether supplying Roman-style resin tiles to municipal housing programs or corrugated ASA panels to bonded warehouses, each shipment is packed, labeled, and documented to meet destination-specific customs protocols—minimizing clearance delays and import risks for public and private sector buyers.
Country-Specific Documentation Prepared in Advance Every shipment includes a full documentation set tailored to your import authority’s requirements. We provide HS-coded commercial invoices, detailed packing lists, CE certificates, Certificates of Origin, and MSDS files covering PVC and ASA composition. Formats are pre-validated for entry at key ports like Mombasa, Hai Phong, Tema, and Jebel Ali, reducing customs queries and streamlining your internal compliance review.
SGS and CE Certification for Public-Sector Tenders All Duolong ASA-PVC roof tiles are certified under ISO 9001:2015 and verified by SGS and CE testing bodies. These certificates confirm mechanical strength, thermal stability, flame resistance, and UV durability—essential for infrastructure contracts, NGO procurement, and government registration of imported roofing systems.
Pre-Loading Inspection Ensures Port Compliance Before shipment, we verify each batch of roof tiles for quantity, thickness, width, and surface color tone. Barcoded pallet labels and reinforced packaging reduce container inspection time at customs and ensure declarations match physical goods. Buyers managing FCL or split shipments across multiple ports benefit from reduced risk of customs holds or fines for misdeclared loads.
Special Documentation for Donor-Funded and Municipal Projects For government or humanitarian buyers, we offer full technical files including fire test reports, VOC compliance statements, recyclable material declarations, and environmental safety certifications. Documents are available in English, French, Arabic, and Vietnamese to meet multilingual compliance needs for international school builds, housing tenders, or refugee infrastructure support.
Certified Export Channels and Port-Synchronized Loading We ship under FOB, CIF, or EXW terms via Ningbo, Qingdao, or Shanghai using bonded freight channels and construction-grade customs brokers. Our logistics team handles container scheduling, loading order, and port-specific documentation handover—ensuring your ASA corrugated roofing panels or trapezoidal tiles arrive within your project’s delivery window.
Ongoing Visibility Through Document Access and Tracking Duolong provides real-time tracking updates, shipping schedules, and customs status notifications throughout the export process. Buyers receive a digital folder with scanned copies of all export documentation, helping internal procurement, warehouse, and compliance teams coordinate import entry, warehousing, and distribution across multiple regions.
A Manufacturing Partner with End-to-End Export Compliance Working with Duolong means more than purchasing roof tiles—it means receiving a complete, customs-cleared delivery with tested, certified, and regulation-ready building materials. Our clients—whether importers, public project contractors, or national distributors—trust us to move compliant roofing systems from factory gate to project gate with zero delay.
Flexible Order Quantities to Support Every Stage of Your Business
Low Minimum Order Quantities for Entry-Level and Trial Projects Not every customer starts at container scale. At Duolong, we offer low MOQ options for clients testing ASA coated PVC roof tiles in new markets or preparing small-batch deliveries for school roofing bids or pilot infrastructure zones. Whether it’s 840mm ASA corrugated roof sheets, 1050mm trapezoidal panels, or Roman profile synthetic resin tiles, our standard products are available for LCL shipments and early-phase deployment.
Mixable Product Formats for Market Testing and Spec Diversity Clients can combine multiple profiles in one order—including ASA corrugated sheets, dual-layer trapezoidal panels, and translucent ASA skylight tiles. This allows distributors to evaluate regional demand, contractors to submit mock-ups for multi-spec tenders, and developers to compare installation performance across roof types. All items are stacked by SKU, barcoded, and prepared for safe, efficient unloading and repacking at destination.
Certified Production Standards for Every Order Size From two pallets to twenty containers, every order is produced on ISO 9001:2015-certified extrusion lines using the same tooling, ASA resin formulation, and material control systems. All ASA roof tiles are inspected for thickness tolerance, wave pitch alignment, and color consistency. Export documents—including CE and SGS reports—are issued for each shipment, ensuring full regulatory compliance even on pilot-phase or sample-driven exports.
Smooth Scale-Up from Small Orders to Full Supply Contracts Clients who begin with test orders of ASA PVC tiles can transition directly into larger procurement rounds without profile deviation. We maintain fixed extrusion molds and locked pigment ratios across orders, enabling reorders that match shape, texture, and surface gloss—critical for public sector projects and multi-phase regional builds requiring seamless aesthetic and structural consistency.
Flexible Quantity Options for Installation Trials and Bid Submissions Trial orders are ideal for product validation on-site—checking screw spacing, roof slope compatibility, and installation sequence before committing to full-scale purchase. Small shipments help contractors prepare visual mock-ups, procurement teams assemble documentation kits, and bidders verify compliance for government or NGO housing tenders.
Full Export Documents Prepared for Every LCL Shipment All orders, regardless of size, are shipped with a complete export pack: commercial invoice, HS code declaration, packing list, certificate of origin, CE documentation, and SGS testing results. We ship from Qingdao, Ningbo, or Shanghai under EXW, FOB, or CIF terms and coordinate customs-cleared LCL forwarding for easier entry into bonded warehouses or jobsite zones.
A Roofing Supply System That Adapts to Your Growth From your first low-volume shipment of ASA coated roof tiles to long-term supply programs spanning multiple territories, Duolong delivers a consistent, certified, and scalable procurement experience. You gain product uniformity, reliable packaging, and smooth export service at every stage—ensuring your roofing supply strategy evolves without compromise in quality or coordination.
Dedicated After-Sales Support for Reliable Project Execution
Ongoing Technical Support for All Roof Tile Shipments Every Duolong shipment includes more than just ASA coated PVC roof tiles—we deliver field-aligned support from day one. Whether you’re installing 840mm corrugated roof panels, 1050mm trapezoidal ASA-PVC tiles, or Roman profile synthetic tiles, our team provides complete documentation, fixing guidance, and on-call coordination to assist public contractors, regional distributors, and government procurement teams throughout project execution.
Fixing Advice Tailored to Roofing Profile and Site Conditions Tile behavior changes under different slopes, structural spans, and weather zones. That’s why we supply roof-specific installation guidelines—like purlin distance for ASA corrugated sheets, screw spacing for wind zones, and panel overlap ratios for thermal movement areas. Our advice is grounded in real jobsite experience and helps contractors avoid future material stress, leak points, and misalignment in institutional or high-traffic structures.
Detailed Installation Manuals by Roofing Type Each order includes printed and digital manuals specific to the product profile—covering fastener positions, ridge cap detailing, wind load resistance, and anchoring points. Whether you’re deploying trapezoidal roof sheets in coastal markets or twin-wall ASA panels in inland zones, you’ll receive clear guidance tailored for your region’s standards and structural practices. These files reduce time loss, errors, and rework during large-scale rollouts.
On-Site Problem Solving Based on Global Project Experience If problems emerge during installation—such as panel misfit, misalignment across ridges, or corner lift under wind exposure—our technical team provides solution-driven support. We’ve resolved roofing issues in Kenya, Vietnam, Jordan, and Indonesia for schools, depots, and logistics hubs. Our support helps contractors protect project timelines and ensure each roofing system reaches its expected lifespan.
Uniform Application for Multi-Location and Multi-Year Contracts We document installation direction, screw specifications, and color batch codes for buyers managing phased public infrastructure, campus renovations, or city-level housing. This reference system ensures each phase of the project mirrors the last—maintaining both visual consistency and technical cohesion, even across different contractors or build cycles.
Training Materials for First-Time Clients and Regional Crews For new markets or newly adopted ASA roofing systems, we supply easy-to-follow guides, 3D illustrations, and multilingual instruction videos. These tools are designed for first-time installers and distributor-side training teams alike. For larger orders or pilot tenders, we offer video calls or guided walk-throughs during the first delivery to reinforce proper techniques from the outset.
Equal Support from Sample Order to Full Rollout No matter the shipment size, our support remains the same. Whether you’re testing corrugated ASA roof panels in a demo installation or delivering full-container quantities for a public tender, Duolong ensures every order includes complete installation readiness. We help your teams install faster, reduce loss, and build with confidence—tile by tile, site by site.
Certification and Documentation Support for Government and Institutional Roofing Projects
Proven Delivery Experience for Public and Donor-Led Projects Duolong has supplied ASA coated PVC roof tiles to government infrastructure and institutional development programs across Africa, Southeast Asia, and the Middle East. From 840mm corrugated roof panels to 960mm trapezoidal ASA-PVC tiles, our materials have been installed in school buildings, municipal shelters, rural housing clusters, and emergency-response structures. We understand the documentation and technical pathways required for public-sector approval, and we align our export process with the procurement protocols of ministries, engineering agencies, and multilateral funders.
ISO-Certified Manufacturing with Verified Material Testing All roofing panels are produced under ISO 9001:2015 quality management and verified through SGS and CE testing for structural strength, UV stability, and thickness consistency. Each batch undergoes extrusion inspection for ASA adhesion, wave shape accuracy, and anti-aging performance. These records are archived and linked to the packing list for each shipment—providing traceability from factory to audit.
Complete Export and Tender Documentation Included Each shipment includes a comprehensive document set for customs and public tender submission: commercial invoice, certificate of origin, HS code declaration, packing list, and CE/SGS certification. We also provide ISO-based technical datasheets, ASA-PVC material composition charts, and Declaration of Conformity matched to public BOQ specifications and national bidding form templates. This reduces modification requests during evaluation and speeds up compliance review.
Product Specifications Aligned with Government Engineering Manuals Our corrugated and trapezoidal PVC roof tiles are pre-calibrated to meet commonly issued public BOQs. We supply 2.5mm and 3.0mm thickness options, fixed wave dimensions, and purlin alignment spacing that match standard government layouts for logistics centers, rural school buildings, and community shelters. This ensures installers avoid non-compliance or modification at site level under inspection.
Multilingual Documentation Support for Regional Compliance To meet the needs of regional audit bodies and government reviewers, we offer bilingual documentation sets in English–Arabic, English–Vietnamese, and English–Thai. Country-specific adaptations for CE-SIRIM conversion, SONCAP file preparation, or QCVN documentation are available upon request. We support local consultants and national procurement offices with audit-ready, format-matching documentation aligned to agency requirements.
Track Record in Government-Backed Roofing Schemes Duolong roof tiles have passed engineering validation and material acceptance in public school roofing tenders, health post upgrades, and donor-financed shelter programs. From UN agency contractors to city-level infrastructure bureaus, our products have cleared inspection and met full specification without need for substitution or delay. This includes documentation clearance at ports, on-site verification, and final payment release phases.
Reliable Support for Procurement Teams and Tender Submissions Working with Duolong means access to a full-service compliance team and a manufacturing system designed for institutional delivery. We support procurement offices and contractors through each submission stage—prequalification, material approval, and shipping clearance. Our products meet CE and ISO standards, our records are verifiable, and our teams are experienced in structuring documentation for public and donor-linked roofing projects across high-compliance markets.
Proven Durability in Humid and High-Temperature Environments
Engineered for Tropical, Coastal, and UV-Intensive Conditions Duolong’s ASA coated PVC roof tiles are specifically built for use in equatorial climates, monsoon regions, and salt-heavy air environments where conventional roofing fails early. Whether you’re sourcing 840mm ASA corrugated roof panels or 960mm trapezoidal ASA-PVC tiles, each format maintains form, color, and performance across long-term exposure to direct sun, torrential rain, and surface heat buildup. Our tiles are installed in port zone warehouses, school campuses, and public housing from Vietnam to West Africa.
Dual-Layer ASA Surface for Superior Weather Resistance Each roof tile is produced via co-extrusion, combining a high-strength PVC base with an ASA outer layer infused with UV stabilizers and anti-aging modifiers. This dual structure prevents chalking, fading, and surface cracking common in low-cost alternatives. Even after years under tropical skies, Duolong ASA-PVC tiles retain their finish, mechanical grip, and installation integrity—proven in real-world structures such as municipal clinics and coastal logistics hubs.
Independently Tested Against Accelerated Climate Simulation All ASA roof tiles are subjected to third-party lab simulations designed to replicate multi-year tropical wear. Tests include 1,000+ hours UV exposure, water absorption rate below 0.1%, and retained impact strength under alternate wet-dry cycling. These validations are backed by actual deployment results in heat-intensive markets such as Nigeria, Cambodia, and the UAE.
Lightweight and Non-Porous Panels Reduce Roof Frame Stress Unlike metal sheets prone to rust or clay tiles that absorb moisture, Duolong’s ASA roof panels are lightweight and water-repellent. This reduces the dead load on timber or steel frames and prevents condensation-related failures. Ideal for fast-built structures like prefab health centers or seasonal market halls, our tiles help prolong structural life and reduce framing cost.
Installation Guidelines Adapted for High-Humidity Construction Each delivery includes region-adjusted installation instructions—accounting for thermal movement, screw spacing, and wind pressure resistance. Guidance on purlin distance, panel overlap, and ridge gap ensures panels remain secure and stress-free through sudden tropical downpours, high daytime temperatures, and fast-cooling nights.
Field-Proven Roofing Performance Across Harsh Climate Zones Choosing Duolong means selecting a roofing solution tested in the same environmental conditions your projects face. Our ASA coated PVC roof tiles continue to protect high-traffic infrastructure, institutional campuses, and rural shelters across humid and sun-exposed markets—offering long-term UV durability, structural safety, and installation consistency for contractors and procurement officers alike.