PPGI and PPGL coil for sectional garage doors, insulated PU door panels, rolling door skins and decorative door-panel production. Available with smooth, embossed, matte and wood-grain surface options.
Door Panel Applications
Material specifications can be adjusted for different door-forming processes, panel structures and appearance requirements.
Garage Door Outer Skins
Weather-exposed prepainted steel with controlled color, gloss, forming performance and surface protection.
PU Door Panel Skins
Outer and inner steel skins with reverse-side coating selected for PU foaming or adhesive compatibility.
Rolling Door and Slat Coil
Slit coil for continuous roll forming, with width, hardness and coating adhesion reviewed for the profile.
Embossed and Wood-Grain Skins
Surface options for residential, villa and commercial door manufacturers seeking a differentiated appearance.
Supply Specifications
Final values are confirmed according to the door profile, roll-forming process, panel structure and project requirements.
Quotation control: state whether the requested thickness is base-metal thickness or finished thickness. Also provide the forming width, finished profile and coil-weight limit.
| Product | Prepainted galvanized or Al-Zn coated steel coil and sheet |
|---|---|
| Typical Door-Skin Thickness | Commonly 0.30-0.60 mm, subject to profile and structural design |
| Width | Slit or master-coil width according to the forming line |
| Steel Grade | Commercial forming or higher-strength grade according to the door profile |
| Metallic Coating | GI, PPGL or selected Zn-Al-Mg substrate according to environment and edge condition |
| Topcoat Systems | PE, SMP, HDP or PVDF |
| Surface | Smooth, matte, stucco, linear embossed or wood-grain |
| Color | RAL color, approved physical sample or custom matched finish |
| Reverse Side | General back coat or PU-bonding system subject to compatibility confirmation |
| Supply Form | Master coil, slit coil, cut sheet or embossed sheet |
| Documents | MTC, packing list and agreed inspection records |
Surface and Appearance Options
Door manufacturers can select the surface according to product positioning, roll-forming method and end-market preference.
Smooth Finish
Clean commercial appearance for industrial and modern residential door panels.
Stucco Embossed
Helps reduce the visual impact of minor forming marks and improves decorative texture.
Linear or Ribbed
Suitable for sectional door patterns and profile designs requiring a stronger visual line.
Wood-Grain Finish
Decorative printed or laminated direction for premium residential and villa door skins.
Sample approval is required. Screen colors and RAL references cannot fully represent gloss, texture, emboss depth or printed wood-grain appearance.
Outer Skin and Reverse-Side Coating
A garage door coil must be specified on both sides. The exposed face controls appearance and weathering, while the reverse side affects bonding and panel production.
Weathering and Appearance
Select the topcoat according to UV exposure, color-retention requirement, corrosion environment, forming demand and project budget.
Compare coating systems in the PPGI coating types guide.
PU Foaming or Adhesive Compatibility
The reverse-side coating must be tested with the actual PU system, adhesive, production temperature and panel process. A generic back coat should not be assumed to work with every foam or adhesive formulation.
Requirements for Door Roll Forming
Material selection must match the profile geometry and production line. A coating that performs well on a flat sheet may not be suitable for a tight bend or deep embossing operation.
T-Bend and Adhesion
Acceptance criteria should match the bend radius, embossing depth and forming sequence.
Steel Grade and Hardness
Balance profile rigidity with roll-forming performance and panel flatness.
Color and Gloss Control
Approve a physical standard and define batch-control requirements for large door orders.
Protective Film
Confirm film adhesion, forming suitability, storage period and removal conditions.
Processing and Supply Support
Everest Steel coordinates coating production through long-term partner lines and supports downstream preparation with dedicated slitting, cut-to-length and embossing resources.
Application Review
Confirm door type, panel structure, forming method, exposed environment and appearance target.
Sample and Specification Approval
Approve color, gloss, texture, embossing, coating structure and forming test requirements.
Coating and Processing
Coordinate coil coating, slitting, embossing or cut-to-length according to the order.
Inspection and Traceability
Check agreed dimensions, color, coating, surface and batch identification.
Packing and Shipment
Protect coil edges and decorative surfaces for export transport and downstream handling.
Quality Control for Door Panel Steel
Test items and acceptance limits are agreed according to the signed specification and forming process.
Dimensions
- Thickness basis and tolerance
- Width and slit-width tolerance
- Coil ID and coil weight
Coating System
- Metallic coating designation
- Primer and topcoat DFT
- Reverse-side coating
Appearance
- Color and gloss
- Embossing or printed pattern
- Surface defects and film
Forming Performance
- T-bend or agreed bend test
- Adhesion
- Profile trial when required
Review the prepainted and laminated steel quality-control process.
Information Required for Quotation
A complete inquiry helps us recommend the correct substrate, coating, processing and packing.
Technical Details
- Door type and final application
- Profile drawing or formed sample
- Base-metal or finished thickness
- Steel grade and width
- GI, PPGL or Zn-Al-Mg substrate
- Topcoat system and color
- Gloss, texture or embossing
- Reverse-side coating requirement
- Protective-film requirement
Commercial Details
- Required quantity by specification
- Coil ID and maximum coil weight
- Slit coil, sheet or embossed supply
- Sample and inspection requirement
- Packing requirement
- Destination port
- Incoterm and delivery target
Send Your Door Panel Specification
We will review the material structure, forming requirement, surface option and supply format before preparing the quotation.
Garage Door Steel FAQ
Which coating is suitable for garage door panels?
PE, SMP, HDP and PVDF are selected according to forming, UV exposure, corrosion environment, color-retention requirement and budget. The final coating structure should be confirmed with the complete door-panel specification.
Can the same steel be used for the outer and inner skins?
Yes, but the exposed-face coating and reverse-side bonding requirements may differ. Outer and inner skins should be specified separately when appearance, corrosion or PU-bonding requirements are different.
What back coat should be used for PU door panels?
The reverse-side coating should be selected and tested with the actual PU system, adhesive, temperature and panel process. A universal back-coat specification should not be assumed.
Can embossed or wood-grain door steel be supplied?
Yes. Smooth, stucco, linear embossed and selected wood-grain finishes can be reviewed according to the required color, pattern, width and quantity.
What information is needed before sampling?
Provide the door application, profile, thickness basis, width, substrate, coating, color, gloss, embossing, reverse-side requirement and target quantity.
Request a Door Panel Material Quote
Include the door type, thickness, width, coating, color, surface and order quantity.
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