Gemini®

• Specification
• Fixings
• Colours
• Detailing & Ventilation
• CAD
• Case Studies
• Documents

FIXING: Nail once. (Aluminium Nail 45mm x 3.35mm). The nail hole diameter is approximately 5mm, with the hole being positioned approximately 37mm down from the head of the tile and 58 mm in from the right hand edge of the tile. In all circumstances, verges should be clipped. A plastic clip is available to enable secure fixing in exposed locations. It is a fixing requirement that the second course of slates is nailed and clipped in all cases, to secure the eaves course. In sheltered locations variations on the fixing specifications may be used, but should not be attempted without consultation with the Forticrete Technical Advisory Service. Forticrete will be pleased to provide written fixing specifications for specific projects as they cannot be held responsible for fixings on projects where their own guidelines are not followed correctly.

FIXING OF GEMINI TILE CLIP: The Gemini Tile Clip is not mechanically fixed to the batten, but clips on to the tile interlock (at point A). The clip is then slid down (to point B) and the curved underlock (C) locates under the back of the tile below (D).

Batten Size: 38mm x 25mm for spans up to 450mm; 50mm x 25mm for spans from 450mm up to 600mm in accordance with BS 5534:2003.

NB: the minimum pitch is based on a maximum rafter length of 10m. For rafter lengths greater than this, please contact the Forticrete Technical Advisory Service.

The table above shows the general fixing information for the Gemini tile, however for more detailed fixing requirements please refer to either the Zonal Fixing Method or alternatively you can request a fixing specification from the Technical Department using the downloadable form. For guidance on quantifying an roof with Gemini tiles  - click here.

GUARANTEE: The colour of Gemini will change with natural weathering over the years but the integrity of the tiles carries a 60 year guarantee, from date of supply, subject to the company's normal terms.
Forticrete Roofing Products' policy is one of continuous improvement and the Company reserves the right to change specifications and designs at any time without notice. The colours reproduced within this website are as close as the photographic  processes will allow.
Where an exact colour match is critical, you are advised to view actual tile samples.

To obtain samples either call our Leighton Buzzard office or complete the online form.

Forticrete has the ability to provide a range of associated fittings to complete your roof whether it is wet or dry fix.

• Eaves Detailing
• Undercloak Dry Verge
• Dry Hip - Third Round 
• Dry Hip - Bonnet 
• Mitred Hip
• Dry Ridge - Ridgeboard
• Dry Ridge - Trussed Rafter
• Mono Pitch Dry Ridge
• Gas Vent Ridge Terminal
• Soil Vent Ridge Terminal
• Abutment Ventilation
• In-Line Ventilation

Standard Components:

• Half Round Ridge
• Third Round Ridge
• Universal Angle Ridge

Download various related CAD details here:

• Secret Gutter Detail
• Abutment Cover Flashing
• Traditional Eaves Detail
• Gemini Undercloak Dry Verge

Recent Projects completed using Gemini;

• Wolverhampton Re-roofing Project
• Persimmon Homes, nr Selby
• Wibb Builders, Alfreton
• Wolverhampton Cricket Club
• Charles Church Homes, Yarm