Industry procurement solution · Reviewed 10 August 2026
Metals for Roofing and Cladding
Roofing and cladding procurement separates structural substrate, metallic coating, organic paint system, profile, fasteners, joints, drainage, environment and warranty instead of buying by color or paint name alone.
Answer first
There is no single metal specification for an entire project
Divide the project into systems, document each service environment and governing code, then select compatible materials, product standards, fabrication routes, protection systems and inspection plans.
Rural, urban, industrial, coastal and high-ultraviolet exterior exposure
Wind uplift, thermal movement, rain, condensation and drainage
Cut edges, formed bends, fasteners, sealants and dissimilar-metal runoff
System map
Material and product selection by project system
| System | Selection drivers and alternatives | Reviewed starting points |
|---|---|---|
| PPGI roofing and wall panels |
| Galvanized coilCarbon steel plate |
| PPGL roofing and cladding |
| Galvanized coilAluminum sheet & plate |
| Profiles, joints and flashings |
| Aluminum sheet & plateGalvanized coil |
| Delivery, storage and installation |
| Galvanized coilAluminum sheet & plate |
Project control
Standards, certification and documents
- Project envelope performance, wind, fire, thermal and acoustic requirements
- Substrate and coating product standards with ordered editions
- Approved color sample, coating technical data, test methods and written warranty
- Panel drawings, fastener/joint schedule, inspection plan and repair procedure
Fabrication and logistics
Package interfaces to control
- Fabrication drawings, welding, heat treatment, coating and repair procedures
- Inspection hold points, testing methods, acceptance criteria and document approval
- Identification through cutting and assembly, preservation, packing and consolidated shipping
- Destination rules, site storage, installation interfaces and delivery sequence
Risk register
Common procurement risks
Treating PPGI and PPGL as interchangeable
Buying by paint name without primer, film build, test method or exposure
Ignoring cut edges, condensation, fasteners and drainage
Promising universal service life or warranty from resin family alone
Comparable offers
Structured RFQ checklist
Project location, service environment, design life and governing codes
System or component, selected material and governing product specification
Dimensions, tolerances, quantity and required delivery sequence
Condition, finish, metallic coating, paint system or corrosion allowance
Fabrication, forming, welding, heat treatment and qualification requirements
Inspection and test plan, acceptance criteria, certificates and hold points
Marking, traceability, packing, preservation and destination
Required delivery date, shipment terms and approved-vendor constraints
Evidence
Sources and review
Project engineering documents and current governing standards supersede this general selection map.
ASTM International · A755/A755M-18(2024); ordered edition controls
British Standards Institution · BS EN 10169:2022; ordered edition controls
European Coil Coating Association · Industry technical guidance
Project sourcing from China
Build a traceable Roofing & cladding supply package
Share the design basis, system list, specifications, quantities, inspection plan, destination and delivery schedule.