The Fastensol Roof Hook for Slate (Landscape) — TH04A is a slim, flat-profile stainless steel hook engineered specifically for mounting solar panel rails on natural slate roofs in landscape orientation. Its low-profile arm slides beneath the slate without lifting or cracking the tile, preserving the roof's waterproofing and structural integrity — a critical requirement on delicate slate coverings.
The hook uses a sturdy 6mm stainless steel bracket, fixed through one slate directly into the rafter beneath, with the slate above replaced over the fixing point so the roof remains weathertight. For added protection, Fastensol recommend using it with CT1 sealant, and a lead soaker is advisable where the bracket sits close to the edge of the covering slate.
Slate Roof Installation Care
Natural slate is a fragile roofing material and can crack or fracture if handled roughly or point-loaded incorrectly during installation. Fastensol recommend using CT1 sealant around the hook penetration point, and a lead soaker where the bracket sits close to the edge of the covering slate, to maintain a fully weatherproof roof.
Professional Installation Required
Installation of Fastensol mounting components must be carried out only by professionally trained installers. It is the installer's responsibility to verify the structural integrity of the roof or substructure the system is fixed to — rotten, rusted, undersized, or excessively spaced rafters are not suitable and installation on such structures will void the warranty.
Key Features
Slim, Low-Profile Design
The flat-profile arm is engineered to slide underneath slate tiles without lifting or cracking them, preserving the tile's natural lay and the roof's watertight seal.
Direct Rafter Fixing Through the Slate
The 6mm stainless steel bracket is fixed through one slate directly into the rafter beneath, giving a solid structural connection rather than relying on the slate itself for support.
Corrosion-Resistant Stainless Steel
Built entirely from stainless steel for long-term durability against the weathering and moisture exposure typical of slate roof installations.
Discreet, Heritage-Friendly Finish
The low, flat profile keeps the hook largely hidden beneath the slate line, making it well suited to heritage and period properties where a discreet solar installation is important.
Landscape Orientation Support
Designed specifically for arrays mounted with panels in landscape orientation, positioning the mounting rail correctly for this layout on slate roofs.
Weatherproof Detailing
Used together with CT1 sealant and, where needed, a lead soaker, the TH04A maintains a fully weathertight roof around each fixing point.
Technical Specifications
Identification
Product Code
TH04A / F-TH04A
Manufacturer
Xiamen Fasten Solar Technology Co., Ltd (Fastensol)
Tile Compatibility
Suitable Roof Type
Natural slate roofs
Recommended Sealant
CT1 sealant (recommended)
Additional Weatherproofing
Lead soaker recommended near slate edges
Material & Construction
Fixing Method
Through one slate, direct to rafter, with wood screws
System Ratings
Maximum Building Height
20 m
Warranty
Product Warranty
12 years material · 5 years finish
Frequently Asked Questions
Will fitting this hook damage my slate roof?
When installed correctly, the TH04A's slim, flat profile is designed to slide beneath the slate without lifting or cracking it. The bracket passes through one slate directly into the rafter, and the slate above is replaced over the fixing point — following Fastensol's installation guidance and using CT1 sealant is important to maintain a watertight result.
Do I need any sealant or additional flashing for this hook?
Fastensol recommend using CT1 sealant around the fixing point for added weatherproofing. Where the bracket sits close to the edge of the covering slate, a lead soaker over the bracket is also advisable to ensure the roof remains fully watertight.
What is the difference between TH04 and TH04A?
TH04 is the portrait orientation slate roof hook, while TH04A is the landscape orientation version — otherwise both share the same slim stainless steel design and fixing method for natural slate roofs.
How thick is the bracket, and why does that matter on slate?
The bracket is 6mm thick stainless steel — substantial enough to carry structural loads while remaining slim enough to sit beneath a slate tile without excessive lift, which is critical for maintaining the roof's weatherproofing on a fragile slate covering.
Can I use this with mounting rails or clamps from another brand?
No. Fastensol components are engineered as a matched system, and mixing Fastensol hardware with mounting equipment from other suppliers is not supported and will void the warranty. Always use genuine Fastensol rails, clamps, hooks and splices together as a complete system.
What warranty does this product carry?
Fastensol backs this product with a 12-year product warranty against defects in material and workmanship, plus a 5-year finish warranty on the anodised coating, from Xiamen Fasten Solar Technology Co., Ltd. The finish warranty is void if the component is not cleaned and maintained in line with AAMA 609 & 610-02 guidance for architecturally finished aluminium, and the full warranty is void if the product is modified, installed incorrectly, or mixed with another manufacturer's mounting hardware.
