Safe Slate — Solar Mounting for Slate Roofs, Done Properly
The first slate roof mounting solution engineered from first principles, not worked around them.
The UK has some of the highest demand for rooftop solar in Europe and some of the most slate-covered rooftops in the world. Slate roofs have been the industry’s unsolved problem for decades. Safe Slate fixes that.
Why the Industry Got Here
In the early days of solar, anchor bolt fixings were standard practice. They were strong, durable, and structurally sound — but they had one critical flaw: the bolt made direct contact with the slate, causing cracking and eventual water ingress. The industry’s response was to abandon the method entirely and reach for workarounds.
That was the wrong lesson. The anchor bolt wasn’t the problem. The contact was.
The Problem With Every Other Approach to Slate Roof Solar Mounting
Slate is one of the most common roofing materials in the UK, and one of the most difficult to work with for solar installation. The two methods that dominate the market both carry serious trade-offs.
- The first involves removing multiple slates, exposing the batten structure, and building out a sub-frame which is a labour-intensive process that adds hours to an install and introduces multiple potential leak points.
The second uses an angle grinder to cut square holes directly into the slate, weakening the tile structurally, generating hazardous silica dust, and leaving an installation that looks exactly as rough as it sounds.
Neither approach is good enough for a professional finish.
Key Features
Zero-Contact Conical Bore
The clearance hole geometry ensures the anchor bolt never touches the slate body under any load or deflection condition. The fundamental cause of historic slate cracking is eliminated by design.
EPDM Rubber Seal with Locking Nut
A watertight finish using a proven, field-tested sealing method. No sealants, no tapes, no maintenance.
Matched Slate Dimensions
Safe Slate is sized to integrate with the existing slate course without shimming, cutting, or adjustment. The array looks factory-fitted from day one.
Composite Construction
UV-stabilised, fire-retardant, and engineered for the full service life of a PV installation. It will not degrade, discolour, or lose structural integrity over time.
No Slate Removal Required
The entire fixing is achieved without disturbing the surrounding slate course. Faster installs, cleaner sites, fewer callbacks.
The Safe Slate Approach
Safe Slate is a precision-engineered composite mounting slate designed to reinstate the anchor bolt method, correctly this time.
- It sits flush within the existing slate course, matching the dimensions and header lap of the surrounding tiles so the roof reads as a continuous, uninterrupted surface.
The anchor bolt passes through a conical clearance hole, engineered with sufficient tolerance that even under natural roof movement and deflection, the bolt never contacts the slate body.
- No contact means no cracking. No cracking means no leaks.
The weatherproof seal is achieved using a high-grade EPDM rubber gasket and a stainless steel locking nut, a method with decades of proven performance on fibre cement roofing systems, now applied to slate for the first time.
The result is a fixing that is structurally superior to every mesh, bracket, or cut-tile alternative on the market.
Installation Overview
Safe Slate is designed to slot into a standard slate installation without specialist tools or additional fixings.
Position within the existing course, anchor through the conical bore into the batten and rafter structure, torque the locking nut to compress the EPDM seal, and the fixing is complete.
No grinding, no cutting, no exposed membrane.
Suitable for new build and retrofit installations across all standard UK natural and fibre cement slate profiles.
Technical Specification
| Construction | UV-stabilised, fire-retardant composite |
| Fixing method | Anchor bolt through conical clearance bore |
| Seal type | EPDM rubber gasket + stainless locking nut |
| Slate compatibility | Standard UK natural & fibre cement slate profiles |
| Installation type | New build & retrofit |
| Certification | MCS certification in progress |
MCS Certification
Safe Slate is currently progressing through MCS certification, the UK’s Microgeneration Certification Scheme, which sets the technical benchmark for solar installation components and is a requirement for consumer installations eligible for the Smart Export Guarantee.
We chose to pursue full MCS certification from the outset because it demands rigorous independent testing of structural performance, weatherproofing, and long-term durability. It’s a higher bar than self-declaration, and we think products used on people’s roofs should clear it.
Photo Gallery
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Safe Slate Video
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Trade Pricing & Availability
Available to trade accounts. Request a quote or contact the team for samples, volume pricing, or technical support ahead of launch.
