Roof Sandwich Panel

The roof is the first line of defense for any steel building – and roof sandwich panels are engineered to be that defense. Combining a strong steel skin with an insulated core, they seal out rain, control heat and cold, and keep industrial, warehouse and agricultural buildings dry and energy-efficient year-round.

Because panels are factory-manufactured to exact lengths, they arrive ready to fix, keeping installation fast and waste low. With multiple cores, thicknesses, profiles and colors available, the roof system is selected to match your climate, your building use and your budget.

Roof Panel Applications

Roof sandwich panels protect buildings from rain, heat and cold while keeping roofs light and fast to install:

• Industrial & Factory Roofs – durable, insulated roofing for production buildings.

• Warehouse & Logistics Roofs – large-area roofing with reliable waterproofing.

• Agricultural Building Roofs – insulated roofing for livestock and crop facilities.

• Cold Storage Roofs – high-performance insulation for temperature-controlled buildings.

• Commercial Building Roofs – clean, energy-efficient roofing for public buildings.

• Roof Extensions & Renovations – lightweight re-roofing over existing structures.

Key Features

• Reliable Waterproofing – sealed profiles and correct laps keep roofs dry.

• Thermal Insulation – insulated cores reduce heating and cooling costs.

• Lightweight – low roof load reduces structural requirements.

• Fast Installation – factory-cut panels fix quickly with minimal labor.

• Fire Performance – core options for different fire ratings.

• Durable Steel Skin – pre-painted steel resists weather and corrosion.

• Design Choice – profiles and colors to match any building.

• Consistent Quality – controlled factory production panel after panel.

Standard Specification Range

Note: final specifications are confirmed against your project drawings and insulation requirements.

Materials & Core Selection

The core determines insulation, fire and cost performance:

• Rock Wool Core – best fire resistance and acoustic performance; ideal for factories and public buildings.

• PU (Polyurethane) Core – highest insulation per thickness; ideal for cold storage and climate-critical buildings.

• EPS Core – economical insulation; ideal for general industrial and agricultural roofs.

Frequently Asked Questions About Roof Sandwich Panels

1. How do the panels prevent water leakage?

Sealed profiles, proper laps and correct fixing details ensure reliable waterproofing when installed to specification.

2. Which core material should I choose for my roof?

Rock wool offers the best fire resistance, PU gives high insulation per thickness, and EPS is the most economical. We recommend based on your building type and budget.

3. How is insulation performance determined?

Panel thickness and core are selected according to your climate zone and the building's temperature requirements.

4. Can the panels match my building design?

Yes. Multiple profiles and colors are available to match your architectural style.

5. Can I order samples first?

Samples are available on request to check quality, color and finish.

6. How fast is installation?

Factory-cut panels install quickly with standard fixing methods; speed depends on roof area and crew size.

7. Do the panels require maintenance?

Pre-painted steel skins need minimal maintenance; periodic cleaning and inspection are recommended.

8. Can panels be used for walls as well as roofs?

Yes. Sandwich panels are available in wall profiles for complete building envelopes.

9. What accessories come with the roof system?

Flashings, ridges, gutters, seals and fixing accessories complete the system.

10. How is the price calculated?

Price depends on core material, thickness, quantity and profile. Share your requirements for a detailed quotation.

11. Can you provide samples or references?

Yes. Samples are available on request, and we are happy to share relevant project references or arrange factory video calls so you can review quality before you decide.

12. How do we start our order?

Simply send your requirements through the contact form or email. Our engineers will confirm the details and respond with a quotation as soon as your requirements are confirmed.

13. What colors and profiles are available?

A range of profiles and colors is available; we will match the panel to your building design and coating preference.

14. How are panels protected during shipping?

Panels are bundle-packed with protective separators and weatherproof wrapping, with loading planned to prevent damage in transit.

15. Can I get a formal quotation?

Yes. Send your roof details through the contact form or email, and we will provide a formal quotation.

Start Your Roof Panel Order in Three Steps

1. Send Your Requirements – share your roof area, panel type and thickness through the contact form or email; our engineers confirm the key parameters with you.

2. Review Quotation & Samples – we prepare the itemized quotation and arrange samples; you review, adjust and confirm the order.

3. Production & Delivery – production starts after confirmation; your panels are manufactured, inspected, packed and delivered on schedule with installation support.

Why Choose Our Roof Sandwich Panels

The roof is the largest surface a building exposes to weather, so the choice of panel determines how dry, how comfortable and how energy-efficient the building will be for decades. Our sandwich panels are produced on automated lines with consistent core density, uniform thickness and sealed profiles – the factors that actually decide waterproofing and insulation performance in service.

Performance is matched to your situation, not sold from one template. Rock wool cores give the fire resistance factories and public buildings need; PU cores deliver the highest insulation per thickness for cold storage and climate-critical facilities; EPS cores offer economical insulation for general industrial and agricultural roofs. Profiles, colors and accessories are selected to complete a roof system that installs fast and stays watertight.

Because we also produce the structural steel the panels sit on, the whole roof envelope – frame, purlins, panels, flashings – comes from one supplier with one responsibility. That coordination removes the classic failure points: mismatched profiles, missing accessories and unclear fixing details.

Typical Roof Panel Systems & Layout Options

Panel systems are designed around the building's span, slope and climate:

• Standing Seam System – concealed fixings and long sheets for the highest weathertightness on low slopes.

• Lapped Sheet System – the economical standard for most industrial and warehouse roofs.

• Insulated Sandwich Roof – factory-bonded core and steel skins for roof and insulation in one panel.

• Roof with Skylights – translucent panels or roof lights integrated for natural daylight.

• Accessorized Roof System – ridges, flashings, gutters and seals supplied to complete the roof.

Packaging, Shipping & After-Sales

We treat logistics as part of engineering, not an afterthought:

• Engineered Packing – panels are bundle-packed with protective separators to prevent damage in transit.

• Project Shipping – lengths planned for container or truck dimensions to minimize waste.

• Installation Support – fixing details, cutting guidance and accessories accompany every order.

• After-Sales Support – spare accessories, technical consultation and warranty terms as specified in the contract.

• Documentation – material certificates and inspection reports provided with delivery.

Project Timeline: From Order to Delivery

From enquiry to delivery, every order follows a controlled process:

1. Requirement Confirmation – confirm panel type, thickness, color and quantity.

2. Production – roll forming, core filling and cutting on automated lines.

3. Quality Inspection – dimensional, coating and adhesion checks.

4. Packaging & Shipping – protected bundles for sea/land freight.

5. Installation Support – fixing guidance and profiles provided with the shipment.

Quality Assurance & Why Choose Derun

Every panel batch is checked for dimensional accuracy, coating quality and core adhesion before shipment. As part of Derun's full steel building supply chain, panels are produced to match the buildings they roof.

• Consistent Production – automated lines deliver uniform panels at scale.

• Complete Supply – panels, accessories and structural steel from one supplier.

• In-House Capacity – 2,000+ tons monthly steel production across two lines.

• Export Ready – packaging prepared for international shipping.

• Technical Support – fixing and detailing guidance from our engineers.

Design & Engineering Process

Every roof order starts with your building, not a template. Our engineers take your roof area, span, slope and climate and confirm the key parameters – panel type, core material, thickness, profile, color and the local requirements for wind, snow and fire. That confirmation becomes the basis of the production schedule, so the panels suit your roof from the very beginning.

The design then moves into detailed planning: panel lengths, profile selection, lap and fixing details, flashings and accessories, all produced as clear production drawings. Because production and design live in the same organization, every detail is checked against our line capability – lengths are optimized for transport and installation, and waste is minimized.

Finally, production begins: steel coils are roll-formed, core is injected or filled, panels are cut to length and inspected for dimensional accuracy and coating quality. The result is a roof system that arrives on site ready to fix, with accessories matched to the building.

Performance, Durability & Maintenance

Our roof panels are engineered for decades of weatherproof service with minimal upkeep. Pre-painted steel skins resist corrosion and UV, sealed profiles keep water out, and the insulated core controls temperature year-round.

• Expected Service Life – engineered for long-term use with proper installation.

• Weather Resistance – profiles and coatings matched to your climate.

• Energy Control – insulated cores reduce heating and cooling costs.

• Simple Upkeep – occasional cleaning and inspection keep roofs performing.

• Replaceable Panels – individual panels can be replaced without re-roofing.

Understanding Your Cost & Quotation

Every panel order is quoted individually because every roof is different. Your quotation is built from the parameters that actually drive cost, so you can compare options and adjust the design to fit your budget.

• Core Material – rock wool, PU or EPS cores with different price levels.

• Panel Thickness – thicker panels cost more but insulate better.

• Quantity & Area – total roof area and order volume.

• Profile & Color – profile type and coating color options.

• Accessories – flashings, ridges, gutters, seals and fixings.

• Shipping – freight to your port and packing method.

Send your roof area, panel type and requirements, and our engineers will respond with an itemized quotation as soon as your requirements are confirmed.

Related Steel Structure Solutions

Roof panels work best as part of a complete steel building package. Explore the related solutions we design and fabricate:

• Steel Structure Warehouse – complete buildings with matching roof systems.

• Agricultural Greenhouse – agricultural structures with insulated roofing.

• Steel Structure Chicken House – poultry buildings with climate control.

• Custom Steel Structure Cowshed – cattle barns with durable envelopes.

Installation Services & On-Site Support

How your roof panels get installed is your choice, and we support every option. The most common is guidance-only: fixing details, lap specifications and step-by-step instructions travel with the panels, and your local crew installs them under our remote support. For teams with less experience, we can provide a supervisor who leads the installation on site and trains your workers as the roof progresses.

For clients who prefer a complete package, our installation team can manage the full roof. Either way, the process is planned in advance: purlin positions are checked against the drawings, panels are delivered in fixing order, and each sheet is fixed and sealed according to the sequence that keeps the roof weathertight at every stage.

Quality and durability are built into the process. We provide fixing and sealing specifications, inspection checklists and safety guidance, and every shipment is documented so site teams can verify each panel against the drawings. Whatever level of support you choose, the goal is the same: a roof installed correctly, safely and ready for decades of service.

• Guidance-Only – fixing details, instructions and remote technical support.

• Supervision – an experienced supervisor leads and trains your crew.

• Full Installation – our team installs the complete roof.

• After-Sales – spare accessories, maintenance guidance and warranty support.

Questions to Ask Before You Order

A few minutes spent confirming these points before ordering saves time and cost later. Our engineers will guide you through each one:

• Roof Geometry – what is the roof area, slope and purlin spacing?

• Climate – what wind, snow, rain and temperature conditions apply?

• Insulation Needs – what temperature control does the building require?

• Access – can delivery and lifting equipment reach the roof?

• Schedule – what is the target installation date?

Get a Quote

Ready to order roof panels? Send your roof area, panel type and location, and we will respond with a detailed quotation as soon as your requirements are confirmed.