Kinetic Solar
Kinetic K-Flash™ Premium Roof Mount (KFLK-42S)
Kinetic K-Flash™ Premium Roof Mount (KFLK-42S)
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Kinetic K-Flash™ Roof Mount (KFLK-42S)
If you're investing in a rooftop solar array, the roof attachment is not the place to cut corners. The Kinetic K-Flash™ KFLK-42S is a premium flashed roof mount designed specifically for asphalt shingle solar installations, giving you a clean, professional attachment point with excellent long-term leak protection.
Unlike basic roof mounts that depend heavily on sealants around exposed roof penetrations, the K-Flash uses a large integrated flashing that slides beneath the shingles and sheds water safely around the attachment point. It is one of the best waterproofing options available for shingled roof solar installs.
This listing is for the KFLK-42S, the premium dual-lag version of the Kinetic K-Flash system. Compared to the single-lag KFLK-2S, the KFLK-42S provides two structural attachment points for improved load distribution and additional support.
The K-Flash provides a fully flashed roof penetration designed to shed water around the attachment point rather than relying solely on exposed sealants. When installed according to Kinetic's instructions, it is backed by Kinetic's leak warranty for added peace of mind.
Many roof attachments rely on sealants, gaskets, and exposed roof penetrations to keep water out. K-Flash takes a better approach by incorporating a full flashing beneath the shingles, allowing water to shed naturally around the attachment point. It is a professional-grade solution for homeowners who want their solar array mounted properly from the start.
Why You’ll Love It
- Premium flashed roof attachment designed specifically for asphalt shingle solar installations
- Excellent waterproofing protection with a large flashing footprint that sheds water around the roof penetration
- Dual-lag structural support for improved load distribution compared with the KFLK-2S single-lag version
- Installer-friendly design for a fast, clean, professional installation
- Professional finished appearance with black flashing that blends well with most roofs
- Backed by Kinetic warranty support when installed according to manufacturer specifications
Pair the KFLK-42S with the KLB3-M L-Bracket Kit and Rapid-1 Rail system for a professional-grade rooftop solar mounting solution designed for long-term strength, clean installation, and reliable service.
Technical Specifications
| Model | KFLK-42S |
| Suitable Replacement For | KFLK-2S |
| Roof Type | Asphalt Shingle |
| Mount Type | Fully Flashed Roof Attachment |
| Structural Attachment Points | 2 |
| Attachment Style | Dual Structural Lag Bolts (4") |
| Flashing Material | Aluminum (Powder Coated) |
| Finish | Black Powder Coat |
| Rail Compatibility | Rapid-1 System and Competitor L-Brackets |
| Application | Residential & commercial solar |
| Warranty | Kinetic limited product warranty / leak warranty when installed per instructions |
Applications
- Residential rooftop solar systems
- Off-grid cabins and cottages
- Garages, workshops, and outbuildings
- Tiny homes and accessory buildings
- Agricultural buildings
- Commercial rooftop solar arrays
- Retrofit solar installations on existing asphalt shingle roofs
What's Included
- Kinetic K-Flash flashing assembly
- Integrated mounting stud assembly
- Two structural lag bolts
- Serrated flange nut
- Manufacturer-supplied hardware package
The KFLK-42S is ideal when you want the waterproofing benefits of the K-Flash system with the added strength of a dual-lag attachment. It can generally be used anywhere a KFLK-2S is specified, while offering superior structural support.
Frequently Asked
Why choose a flashed roof mount instead of a standard roof attachment?
A flashed mount physically directs water around the roof penetration rather than relying entirely on sealants, gaskets, or exposed fastener points. This provides an additional layer of waterproofing protection and is widely considered one of the best attachment methods for asphalt shingle roofs.
What's the difference between the KFLK-42S and KFLK-2S?
Both models use the Kinetic K-Flash waterproof flashing system. The KFLK-2S uses a single structural lag bolt, while the KFLK-42S uses two structural lag bolts for additional attachment strength and improved load distribution.
The KFLK-42S can generally be used anywhere a KFLK-2S is specified, while offering superior structural support.
Check your local codes to see if the 2 Screw version is required
Is the KFLK-42S a suitable replacement for the KFLK-2S?
Yes. The KFLK-42S is a suitable replacement for the KFLK-2S in most installations where the K-Flash system is specified. It provides the same flashed waterproofing approach with the added benefit of a second structural lag bolt.
Will this work with the rail you sell?
Yes. The KFLK-42S is designed for use with the Rapid-1 rail using compatible L-bracket hardware, such as the KLB3-M L-Bracket Kit.
Do I need the KLB3-M L-Bracket Kit?
For a complete rail attachment point, the KFLK-42S is typically paired with compatible L-bracket hardware. The KLB3-M L-Bracket Kit is the matching component we recommend for use with Rapid-1 rail.
Can this be installed on an existing roof?
Yes. The K-Flash is designed for asphalt shingle roofs and is commonly used for retrofit solar installations on existing homes, shops, cabins, and commercial buildings.
Does this require roof sealant?
While not a requirement, it is recommended to use a quality sealant in the stamped channel of the flashing. This provides a second layer of leak protection in combination with the fully flashed design.
Always follow current Kinetic installation instructions and local building requirements.
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