The Genius Roof Slate Refit Kit, built around the manufacturer's SolarFlash system, is the trade-standard waterproof flashing solution for refitting slates around roof anchor brackets on existing slate roofs during solar PV installation. Manufactured by Hallclip (Genius Roof Solutions), it replaces the old practice of hand-dressing flashing material around a bracket — a method that leaves the flashing free to move with the bracket and can crack or dislodge slates over time.
Because the bracket is held clear of the roof covering by the SolarFlash hood, the slate beneath is never made load-bearing and the roof anchor is free to move as designed. The kit is used across the UK by solar installers, roofing contractors, housing associations and developers, and helps installations meet MCS 012 compliance for weatherproofing around roof-mounted brackets.
364 x 364mm
SolarFlash Panel
Up to 600mm
Compatible Slate Length
1 per Bracket
Kit Coverage
MCS 012
Compliance Support
Please Note: This is the Slate Refit Kit, designed specifically for existing slate roofs where slates are being cut and refitted around a new bracket. A separate SolarFlash Slate New Build Kit is used for new or fully stripped slate roofs. Choosing the correct kit for the roof condition is essential for a compliant installation.
Waterproof SolarFlash Hood
The 364mm x 364mm moulded flashing panel sits proud of the roof anchor bracket, allowing the bracket to move freely without ever contacting the flashing or making the slate beneath it load-bearing.
Weather Stop Foam Included
A foam insert is fitted to the bracket drop to seal the SolarFlash hood. It is specifically designed to stop wind-driven snow from being carried into the roof space and must be used on every installation.
3 x Hallhooks Supplied
Patented (GB2473637) Hallhooks let installers refit the final course of slates around the bracket even when neither original nail hole is accessible, without needing to renail through the slate.
Compensation Hooks Included
Where only one nail hole on a slate can be reached, the supplied compensation hooks stop the slate head from tilting off the batten, keeping the course tight and properly supported.
Hookpull Tool Supplied
A dedicated hookpull tool is included to draw each slate firmly down onto its Hallhook during refitting, giving a controlled, consistent finish course by course.
Shims for Bracket Clearance
Two shims (packings) are supplied to lift the roof anchor bracket away from the slate beneath where the bracket's elbow clearance is on the tighter end of the compatible range.
Please Note: The bracket's elbow must give at least 30mm clearance from the rafter before bending down the roof face. Brackets with only 30–35mm clearance will need the shims supplied in this kit; brackets with 40–45mm clearance typically will not. Some brackets on the market are not compatible with any flashing system — check clearance before ordering.
| Product Details |
| Manufacturer |
Genius Roof Solutions (Hallclip) |
| Part Number |
GEN-SLATE |
| Product Range |
SolarFlash |
| Kit Type |
Slate Refit Kit (for existing slate roofs) |
| Dimensions & Compatibility |
| SolarFlash Panel Size |
Approx. 364mm x 364mm |
| Compatible Slate Length |
Up to 600mm (24 inches) |
| Slate Types |
Natural slate and fibre cement slate |
| Minimum Bracket Clearance |
30mm from rafter to bracket elbow bend |
| Kit Contents |
| SolarFlash Panel |
1 x large SolarFlash (364mm x 364mm) |
| Weather Stop Foam |
1 x foam insert |
| Hallhooks |
3 x Hallhooks (patent no. GB2473637) |
| Compensation Hooks |
3 x compensation hooks |
| Hookpull Tool |
1 x hookpull |
| Shims |
2 x shims (packings) |
| Compliance & Use |
| Standard Supported |
MCS 012 weatherproofing compliance for roof brackets |
| Typical Users |
Solar PV installers, roofing contractors, housing associations, developers |
| Required Roof Hooks |
Must be used with a flat tile roof hook (e.g. rosemary, peg or biscuit profile) — one SolarFlash kit is required per roof hook/bracket in the installation |
| Training Required |
None — designed for installation without additional expert training |
Good to Know: One SolarFlash kit is required for every roof anchor bracket in the installation, so order quantities to match your total bracket count, not your panel count.
Important Safety Information: Bracket compatibility varies. Some roof anchor products on the market do not provide the minimum 30mm elbow clearance this system needs and are not compatible with any flashing solution, including SolarFlash. If you are unsure whether your chosen roof anchor is compatible, contact our technical support team before ordering.
Which roof condition is this kit designed for?
The Slate Refit Kit is designed specifically for existing slate roofs, where slates around a newly fitted bracket need to be cut and refitted. For new-build or fully stripped slate roofs, the separate SolarFlash Slate New Build Kit is used instead.
How many kits do I need for my installation?
You need one SolarFlash kit per roof anchor bracket, not one per panel or per installation. Count the total number of brackets your mounting system requires and order that many kits.
Do I still need a roof hook as well as this kit?
Yes. SolarFlash flashes around the bracket itself, but it must be used together with a flat tile roof hook (such as a rosemary, peg or biscuit tile hook) that actually secures the slate to the batten. The kit does not replace the roof hook.
What is the maximum slate length this kit will work with?
The Slate Refit Kit is designed for slate lengths of up to 600mm (24 inches), covering the natural and fibre cement slate sizes most commonly found on UK roofs.
What are the Hallhooks and compensation hooks used for?
Both are used to refit the final course of slates around the bracket. Hallhooks let you refit a slate when neither of its original nail holes can be reached, while compensation hooks stop a slate tilting off the batten when only one nail hole is accessible.
Is the weather stop foam essential, or can I leave it out?
It must be used on every installation. The foam seals the SolarFlash hood against the bracket and is specifically designed to stop wind from driving light snow into the roof space beneath it.
