Commercial Roof Renovation and Over-Cladding Systems
Renovating deteriorated asbestos, leaking corrugated sheets, or uninsulated factory roofs restores structural integrity, slashes energy cooling/heating losses by up to 60%, and prepares facilities for rooftop Solar PV generation.
- ✓ Cut-to-Length: Custom continuous lengths from 2.00m to 13.50m
- ✓ Freight Capacity: Domestic truckloads or 40ft High Cube container stuffing
- ✓ Static Support: Purlin span, wind uplift, and quantity takeoff support
- ✓ System Quality: Certified testing per European EN 14509 norms
Key Engineering Advantages for This Sector
Structural Demands & Operational Challenges
Thousands of legacy industrial complexes constructed during past decades struggle today with severely deteriorated roof envelopes. Common legacy roof systems include brittle corrugated asbestos cement sheets, badly corroded single-skin profiled metal, or failing multi-layer bituminous felts. These failing roofs haemorrhage interior heat during winter, turn manufacturing floors into ovens in summer, and suffer persistent water leaks every time rain falls. Water dripping onto electrical switchboards, automated machinery, and boxed finished goods represents an unsustainable commercial risk. SerPan Metal’s industrial roof renovation program transforms deteriorated factory roofs into high-performance, energy-efficient building envelopes—either through full phased strip-and-replace protocols or non-disruptive over-cladding systems executed with zero manufacturing downtime.
Optimized Composite Panel & Sub-Framing Systems
SerPan Metal addresses these challenges through two proven methods: The first is "Over-Cladding (Roof-over-Roof)". The existing roof is left intact undisturbed; lightweight adjustable galvanized spacer purlins (Z or Omega sections) are anchored directly through to existing structural framing. High-performance 5-rib PIR sandwich panels (SP-ROOF-PIR) are fastened overhead, encapsulating the old roof while plant machinery operates without disruption. The second method is "Phased Strip & Resheet", where only the exact square meterage that can be weather-sealed that working day (typically 300 to 500 m²) is stripped and immediately enclosed. Our 5-rib panels restore complete weather integrity while structural platform strength for future Solar PV arrays.
High moment resistance bridging purlin spans up to 2.50m with solar PV readiness.
Airtight tongue-and-groove joint profile with micro-rib surface planarity.
Thermal Envelope, Fire Safety & Energy Performance
Thermal gains and losses through the building envelope represent up to 40% of an industrial facility’s annual operating energy expenditures. SerPan Metal polyisocyanurate (PIR) cores deliver an ultra-low thermal conductivity of λ = 0.022 W/mK, while non-combustible rockwool cores deliver certified fire barriers resisting temperatures above 1000°C for 60 to 120 minutes (REI 60–120).
Weatherproofing & Drainage Engineering
Renovated roof watertightness hinges on meticulous perimeter interfaces across eaves, parapet flashings, and valley transitions. In our retrofit protocols, deteriorated leaking valley gutters are replaced with custom oversized pre-coated galvanized box gutters. Structural sag across aging purlins is compensated using shimmed sub-purlin brackets. Ridge capping details incorporate continuous breathing closures that vent trapped moisture from the interstitial cavity.
Step-by-Step Site Installation Guide
Procurement & Specification BOQ Checklist
To guarantee accurate quotation and factory-line fabrication, verify these 6 critical parameters before ordering:
Request a Project-Based Material Quotation
Share your project details; we will review your quantities and provide a tailored commercial offer via WhatsApp or Email.
Consult our architectural engineers for purlin span calculations, fire compliance, and BOQ takeoffs.
+90 505 507 04 18 Cevizli Mah. Orhan Gazi Cd. No: 24/B Maltepe / İstanbulDirect factory shipments delivered to site via open flatbed trucks or packaged for 40ft High Cube sea containers.
Optimized Envelope Systems for This Application
Selected composite panels and secondary steel profiles delivering peak lifecycle performance.
Roof sandwich panels with rigid PUR foam are designed with 3 or 5 ribs to deliver structural span rigidity, storm resistance and continuous thermal insulation for industrial, commercial and storage buildings. Produced continuously with customizable lengths to eliminate end-laps. The reinforced 5-rib geometric crown profile is fully certified for solar photovoltaic (PV) rooftop mounting rails without compromising envelope watertightness.
PIR foam offers enhanced cross-linked molecular bonds that char upon exposure to heat, suppressing flame spread while maintaining peak thermal insulation. Flame-retardant PIR core paired with high-moment 5-rib crown geometry makes it the premier insurance-approved choice for rooftop solar PV installations.
Rock wool panels feature high-density mineral wool fibers positioned perpendicular to metal faces. Engineered for high-risk industrial facilities, transformer rooms and sound-insulated enclosures.
Manufactured from 1200 mm steel coils to provide a full 1000 mm effective cover width with 6 ribs. Fewer end-laps, faster installation, and maximum area coverage per panel make it the industrial benchmark for factory roofs and warehouse walls.
Cold-formed C and Z purlins replace heavy hot-rolled steel sections, reducing structural weight by up to 40% while accelerating bolting speed with factory-punched holes.
Water tightness and architectural aesthetics of a metal building envelope depend directly on coordinated flashings, ridge caps, valley gutters and corrosion-resistant fasteners.
Roof & Wall Sandwich Panel Quantity & Logistics Calculator
Define your building dimensions and scope (Roof, Wall or Complete Envelope) to estimate net surface area, tonnage, logistics and budget.
Frequently Asked Questions
Common technical inquiries regarding sandwich panels, profiles, pricing, and export supply.
Ready to Receive a Factory-Direct Project Quotation?
Share your project drawings or quantity takeoffs; our engineering team will provide a comprehensive commercial offer within 2 hours.