Which Types of Solar Fasteners Are Best for Different Roofing Materials
2025-08-15
When installing solar panels, one crucial yet often overlooked component is the solar fastener. The right choice can mean the difference between a secure, long-lasting system and one that fails under harsh weather. With over 20 years of experience in the solar industry, I’ve seen how improper fasteners lead to leaks, corrosion, and even panel detachment.
At Gangtong Zheli, we specialize in high-quality solar fasteners designed for different roofing materials. Today, I’ll break down the best options for your specific roof type—because not all fasteners are created equal.
Why Does Your Roofing Material Determine the Best Solar Fastener?
Different roofs require different solar fasteners to ensure a secure, weatherproof fit. Using the wrong type can damage the roof, void warranties, or reduce system efficiency. Here’s what you need to know:
1. What Are the Best Solar Fasteners for Asphalt Shingle Roofs?
Asphalt shingles are common but can be easily damaged by improper fasteners. The best options include:
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L-Feet with Lag Bolts – Penetrates the roof deck for maximum hold.
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Standing Seam Clamps – For attaching rails without drilling (ideal for avoiding leaks).
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Flashing-integrated Mounts – Prevents water infiltration.
Recommended Gangtong Zheli Product:
✔ GTZL-ASF Series – Corrosion-resistant stainless steel with integrated sealing washers.
| Parameter | Specification |
|---|---|
| Material | 304 Stainless Steel |
| Load Capacity | 150 lbs per fastener |
| Weather Resistance | UV & salt-spray tested |
2. Which Solar Fasteners Work Best for Metal Roofs?
Metal roofs are durable but require non-penetrating solutions to avoid corrosion.
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S-5! Clamps – No drilling, attaches directly to seams.
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Purlock Standoffs – Provides elevation for airflow.
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Self-Tapping Screws – Only for corrugated metal (with neoprene seals).
Recommended Gangtong Zheli Product:
✔ GTZL-MRF Series – Zinc-aluminum coated for extra rust protection.
| Parameter | Specification |
|---|---|
| Coating | ZA-45 Zinc-Aluminum |
| Thread Type | Self-tapping, fine pitch |
| Seal Type | EPDM rubber gasket |
3. What Solar Fasteners Should You Use for Tile Roofs?
Tile roofs are fragile—drilling can crack them. The best solutions:
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Tile Hooks – Slides under tiles without breaking them.
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Bracket Systems – Distributes weight evenly.
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Non-Penetrating Ballast Mounts – For flat concrete tiles.
Recommended Gangtong Zheli Product:
✔ GTZL-TRF Series – Adjustable hooks for Spanish & concrete tiles.
| Parameter | Specification |
|---|---|
| Material | Powder-coated aluminum |
| Weight Capacity | 200 lbs per hook |
| Adjustability | 15° tilt range |
4. Are There Special Solar Fasteners for Flat Roofs?
Flat roofs need weight distribution and waterproofing.
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Ballasted Mounts – Uses concrete blocks (no penetration).
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Penetrating Roof Anchors – For high-wind areas (requires sealant).
Recommended Gangtong Zheli Product:
✔ GTZL-FRF Series – Low-profile, wind-rated brackets.
How Do You Ensure Long-Term Durability with Solar Fasteners?
Even the best solar fasteners can fail if installed incorrectly. Follow these tips:
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Always use manufacturer-recommended sealants.
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Check local wind & snow load requirements.
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Inspect fasteners annually for corrosion.
At Gangtong Zheli, we engineer our solar fasteners to last decades—because your solar system should outlive your roof.
Ready to Secure Your Solar Installation?
Choosing the right solar fastener is critical for performance and safety. At Gangtong Zheli, we provide industry-leading solutions tailored to your roofing material.
📩 Contact us today for a free consultation—let’s make sure your solar project stands the test of time!
