0.45mm DX51D Z120 PE Pre Painted Corrugated Roofing Sheet RAL9002 for Industrial and Residential Roofing

0.45mm DX51D Z120 PE Pre Painted Corrugated Roofing Sheet RAL9002 for Industrial and Residential Roofing

１．Product Overview

0.45mm DX51D Z120 PE Pre Painted Corrugated Roofing Sheet is a profiled color-coated steel product designed for industrial workshops, warehouses, residential buildings, agricultural facilities, equipment shelters, and wall cladding systems.

The product uses DX51D galvanized steel as the substrate, with a total zinc coating weight of 120g/m². A polyester paint system is applied to the galvanized surface before the flat steel sheet is formed into a corrugated or trapezoidal roofing profile.

The 0.45mm thickness supports lightweight roofing construction and continuous roll-forming production. The RAL9002 color provides a neutral grey-white appearance suitable for industrial and commercial building projects.

２．Technical Solution

The galvanized steel substrate provides the primary metallic corrosion protection. The Z120 zinc coating forms a protective barrier over the base steel and provides sacrificial protection around cut edges and areas of minor coating damage.

Before painting, the galvanized surface is cleaned and chemically treated. A primer is applied to improve adhesion between the metallic coating and the PE top coat. The polyester coating provides color, surface protection, and resistance to normal atmospheric exposure.

The coated steel is processed through a roll-forming line to create the required corrugated or trapezoidal profile. The formed ribs improve sheet rigidity and guide rainwater toward the roof drainage system.

The reverse side can be supplied with a protective back coating to reduce surface exposure during storage, transportation, forming, and installation.

３．Specifications

４．Application

• Industrial workshop roofing
• Warehouse roof systems
• Residential roofing
• Agricultural buildings
• Steel structure buildings
• Commercial building roofs
• Equipment shelters
• Garage roofing
• Canopies and awnings
• Factory wall cladding
• Temporary buildings
• Fencing and enclosure panels

５．Processing

• Continuous roll forming
• Corrugating
• Trapezoidal profiling
• Cut-to-length processing
• Slitting
• Edge trimming
• Punching
• Drilling
• Bending
• Curving
• Protective film application
• Customized profile production

６．Advantages

• The 0.45mm thickness supports lightweight roofing and wall cladding production.
• DX51D substrate provides suitable forming performance for corrugating and profiling.
• Z120 zinc coating improves corrosion protection for general building applications.
• The PE coating provides consistent color appearance and surface protection under normal construction conditions.
• RAL9002 offers a neutral color suitable for industrial, commercial, and residential buildings.
• The corrugated profile improves rigidity compared with an unprofiled flat sheet of the same thickness.
• Customized sheet lengths can reduce cutting waste and minimize transverse joints during installation.
• The factory-applied coating reduces additional painting work after profiling and installation.

７．How to Choose

• Choose the sheet thickness according to roof span, purlin spacing, wind conditions, profile depth, and required panel rigidity.
• Select the zinc coating according to rainfall, humidity, industrial exposure, and the expected service environment.
• Use PE coating for general roofing and wall cladding projects under normal atmospheric conditions.
• Consider HDP, SMP, or PVDF coating systems for projects requiring improved UV resistance, weather resistance, or long-term color retention.
• Confirm the difference between overall width and effective width. Roofing quantity calculations should be based on the effective coverage after side overlap.
• Select the profile shape according to roof slope, drainage requirements, fastening method, and compatibility with existing roofing systems.
• Confirm the RAL color before production, especially when multiple production batches will be installed on the same building.
• Specify customized sheet lengths according to roof dimensions, transportation limits, lifting conditions, and installation requirements.

８．FAQ

Q1．What is the substrate of this roofing sheet?

The representative substrate is DX51D hot-dip galvanized steel, which is suitable for continuous roll forming and roofing profile production.

Q2．What does Z120 mean?

Z120 indicates a total nominal zinc coating weight of approximately 120g/m² on both sides of the galvanized steel substrate.

Q3．What paint system is used?

The product uses a polyester paint system consisting of surface pretreatment, primer, and PE top coating.

Q4．What is the difference between overall width and effective width?

Overall width is the complete physical width of the roofing sheet. Effective width is the actual roof coverage after adjacent sheets are overlapped.

Q5．Can the sheet length be customized?

Yes. The roofing sheet can be cut according to roof dimensions, installation requirements, transportation restrictions, and production capability.

Q6．Can pre painted corrugated sheets be used for wall cladding?

Yes. The profiled sheets can be used for factory walls, warehouse cladding, internal partitions, fencing, and equipment enclosures.

Q7．Is protective film available?

Protective film can be applied when additional surface protection is required during transportation, profiling, handling, or installation.

Q8．How should pre painted roofing sheets be stored?

The sheets should be stored in a dry and ventilated area with suitable support underneath. Standing water, condensation, direct contact with wet ground, and surface abrasion should be avoided.