Mini Rail Solar Mounting System for Trapezoidal Metal Roofs

The Mini Rail mounting system is specially designed for trapezoidal (corrugated) metal roofs commonly used in commercial and industrial buildings. It features compact aluminum short rails combined with mid and end clamps, fixed by self-tapping screws and dual-side EPDM rubber strips to enhance waterproofing and stability. This system enables fast, secure, and cost-effective solar panel installation without compromising roof integrity.

Product Specifications:

Product Features:

.Dual-Side Waterproof Sealing
Each Mini Rail includes EPDM rubber strips on both sides of the base. When fixed using self-tapping screws, the rubber compresses tightly against the roof surface, forming a secure waterproof seal.

.Lightweight & Cost-Efficient
Short rail design minimizes aluminum usage, reduces overall cost, and is easy to transport and handle.

.Perfect Fit for Trapezoidal Roofs
Optimized for use on trapezoidal sheet metal roofs (e.g., T18, T35, 470-type), without requiring full roof penetration or complex clamps.

.Quick & Easy Installation
Modular components and direct mounting reduce labor time and simplify the installation process.

.Clean Appearance
The low-profile design keeps rails hidden beneath the panels, maintaining a sleek and uniform look.

Installation Instructions:

Mark & Measure
Based on the layout plan, mark installation points along the crest (high ribs) of the trapezoidal roof sheets.

Apply Rubber Strips
Attach EPDM rubber strips along both sides of the Mini Rail base before installation.

Fix Mini Rail
Position the rail at the marked location. Fasten using self-tapping screws through the center of the rail. Rubber strips will compress to form a watertight seal.

Mount Solar Panels
Use Mid Clamps to secure adjacent panels and End Clamps to fix panels at both ends.

Final Inspection
Ensure all rails are securely fastened, rubber strips are properly compressed, and there are no loose parts.

FAQs：

• 
  Q1: Is this system suitable for standing seam or seamed roofs?

  A1: No. This Mini Rail system is designed only for trapezoidal sheet metal roofs. For standing seam roofs, a non-penetrating clamp system is recommended.
• 
  Q2: How is waterproofing ensured?

  A2: Dual EPDM rubber strips are compressed during installation, creating a strong seal between the rail and roof surface, effectively preventing water ingress.
• 
  Q3: Will drilling into the roof affect its integrity?

  No. Screws are placed on the raised crest of the roof sheet. With proper sealing, there’s no compromise to structural or waterproof performance.
• 
  Q4: What roof profiles are compatible?

  Compatible with most trapezoidal metal roofs including T18, T20, T35, T40, 470-type, 820-type, and similar corrugated profiles.
• 
  Q5: Can the system be customized?

  Yes. Rail length, clamp sizes, and surface colors (anodized silver or black) can be tailored to specific project needs.