Flexible Membrane Roof
Solar Mounting Solution
Valin’s patented RailBase™ integrated membrane-rail system delivers a 100% waterproof, non-penetrating PV mounting solution for TPO/PVC/EVA membrane roofs. Hot-air welded directly to the roof membrane — no drilling, no ballast, no leaks.
Protecting Your Roof Is Protecting Your Investment
Every roof penetration is a potential leak. Valin’s zero-perforation approach eliminates risk at the source.
100% Waterproof
Hot-air welded directly to the TPO/PVC membrane — the same process used in the original roof construction. Zero roof penetrations means zero leak paths.
40% Faster Installation
Factory pre-assembled base reduces on-site labor. Panels install immediately after welding — no curing, no ballast handling. Save time and manpower.
Super Wind-Resistant
SGS-tested to 4000N pull-out force. The integrated membrane-rail bond exceeds standard wind uplift requirements for low-slope commercial roofing.
Universal Compatibility
Works with all standard solar panels, with special optimization for lightweight flexible panels. Supports south tilt, east-west, and flat configurations.
Four Systems. One Principle. Zero Perforation.
Every Valin non-penetrating system uses the same proven RailBase™ membrane-welding technology, adapted to different panel orientations and roof conditions.
Flat Installation
Low-profile flat mount. Ideal for minimal visual impact and maximum wind resistance. Panels sit parallel to the roof surface for a clean, streamlined installation.
South Tilt Installation
10° south-facing tilt boosts energy yield by up to 15% vs. flat mount. Integrated front/rear supports and diagonal braces ensure stability at angle.
East-West Installation
Dual-tilt 10° east-west orientation maximizes energy generation during morning and afternoon peaks while significantly improving wind resistance.
Flexible Panel Bracket
Engineered for lightweight flexible modules (1000–2500mm length). Extended base with increased density provides robust support, preventing cell microcracks from panel sagging.
Engineered for Performance
Every component is precision-manufactured and third-party tested to meet the highest industry standards.
Structural Performance
- Wind Resistance (SGS)4000 N
- Snow Load Capacity1.6 kN/m²
- Installation Tilt0° / 10°
- Panel OrientationFlat / South / E-W
Material & Durability
- Base MaterialAluminum 6063-T5
- Fastener MaterialStainless Steel 304
- Membrane CompatibilityTPO / PVC / EPDM
- Weld MethodHot-air Welded
RailBase™ R-Series
- R250250mm · Compact
- R500500mm · Standard
- R10001000mm · Extended
- R18401840mm · Full Row
Non-Penetrating Solar Mounting
for Flexible Membrane Roofs
An in-depth technical overview of Valin’s RailBase™ integrated membrane-rail system — covering design principles, engineering validation, performance data, and installation methodology.
Introduction & Background
Low-slope membrane roofs (TPO, PVC, EPDM) are the dominant roofing type for commercial, industrial, and institutional buildings worldwide. Their seamless waterproof membrane provides reliable building envelope protection — but also presents a fundamental challenge for solar PV installation: how to mount panels without compromising the roof’s waterproof integrity.
Traditional penetration-based mounting systems drill through the membrane and into the roof deck, creating leak paths that require ongoing maintenance and increase long-term owner risk. Ballasted systems avoid penetrations but add significant dead load (typically 15–25 psf), often exceeding the roof’s structural capacity and increasing building costs.
Valin’s RailBase™ system introduces a third approach: a hot-air welded, non-penetrating base that bonds directly to the membrane surface using the same welding process as the original roof construction. This eliminates both leak paths and ballast weight.
System Design & Components
The RailBase™ system consists of four primary component categories:
All aluminum components are anodized to AA15 corrosion protection rating. Fasteners are 304 stainless steel. The welding flange uses a co-extruded TPO/PVC bonding layer matching the roofing membrane polymer for chemical fusion during hot-air welding.
Engineering & Load Analysis
The RailBase™ system has been tested by SGS — the world’s leading inspection, verification, testing and certification company.
SGS Test Results — Key Findings
- •
Pull-out Resistance: 4000 N — the welded base-to-membrane bond exceeds the failure load of the membrane material itself. In all test cases, the membrane tore before the weld failed. - •
Shear Load Capacity: Exceeds 2500 N per base unit at ambient temperature (23°C). - •
Elevated Temperature Performance: No significant reduction in bond strength at 80°C (typical roof surface temperature on a summer day). - •
Cyclic Loading: 10,000-cycle fatigue test — zero degradation in weld integrity.
Membrane Compatibility & Welding Process
The RailBase™ system is compatible with the three most common membrane types used in low-slope commercial roofing:
Weld Temp: 480–620°C
Weld Speed: 1.5–3.0 m/min
Weld Temp: 450–580°C
Weld Speed: 1.0–2.5 m/min
Adhesive: EPDM splicing adhesive
Cure Time: 24 hrs
Welding Procedure: The membrane-rail base is positioned on the clean membrane surface. A standard hot-air welding gun (same equipment used for membrane seam welding) heats both the membrane surface and the base’s co-extruded bonding flange simultaneously. A silicone roller applies uniform pressure as the weld cools, creating a molecular-level fusion bond. The process requires no primer, adhesive, or mechanical fastener. Cooling to full bond strength takes approximately 60 seconds.
Quality Assurance: Weld integrity can be verified via the same methods used for membrane seams — visual inspection, manual probe testing, and optional spark testing for critical installations.
Performance Comparison
| Parameter | RailBase™ Non-Penetrating | Penetration Mounting | Ballasted System |
|---|---|---|---|
| Roof Penetration | None | 8–12 per kW | None |
| Dead Load Added | <1 psf | <1 psf | 15–25 psf |
| Leak Risk | Zero | Moderate–High | Zero |
| Installation Speed | 100–150 kW/day | 60–90 kW/day | 40–70 kW/day |
| Rooftop Equipment | Minimal | Drills + Fasteners | Crane + Ballast |
| Roof Warranty Impact | Preserved | Voided | May be voided |
Typical Applications & Project Suitability
The RailBase™ system is particularly well-suited for:
Certifications, Standards & Downloads
Valin’s RailBase™ non-penetrating system complies with the following international standards:
SGS — Structural pull-out & cyclic load testing
IBC 2021 — Structural design load compliance
ISO 9001:2015 — Quality management system
CE Marking — European construction product regulation
TÜV — Component safety certification
UL 2703 — PV module mounting system safety
Download Full Whitepaper (PDF)
Technical datasheet, SGS test report, installation manual, and CAD drawings available on request
Simple. Fast. Reliable.
From delivery to solar generation in just a few steps — no special tools required.
Layout & Position
Mark the RailBase™ positions on the membrane roof according to the engineering plan and panel layout.
Hot-Air Weld
Weld the integrated membrane-rail base directly to the roof membrane using standard hot-air welding equipment.
Mount Components
Attach the front/rear supports or tilt adapters to the welded base. No drilling or ballast required.
Install Panels
Place and clamp solar panels onto the assembled structure. Connect wiring and commission the system.
Electrical Connection
Connect the DC cables, install micro-inverters or string inverters, and route wiring through the integrated cable management system.
Testing & Commissioning
Perform system testing, verify electrical safety, commission the monitoring system, and hand over the completed solar installation.
Trusted by Solar Professionals Worldwide
Since 2021, Valin New Energy has been at the forefront of membrane roof solar mounting innovation — 3GW+ supplied, 5 manufacturing bases, and a growing global presence.
Ready to Make Your Membrane Roof a Solar Asset?
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