Built to Last: The Rigorous Testing Behind Forticrete Gemini’s Performance

At its most basic level, a roofing tile’s purpose is simple – to keep the rain out and protect the home. But at Ibstock, we go far beyond the basics. Our mission is to deliver sustainable roofing solutions that combine performance, strength, and longevity.

One of our standout products, the Forticrete Gemini range, has earned its place as the crowning glory on more than one million homes across the UK. These concrete tiles capture the charm of a traditional double-cambered plain tile while offering the cost and installation efficiencies of a single-lap interlocking design. For contractors, that means faster installation without compromising on quality or appearance.

The Forticrete Gemini’s timeless profile and versatile colour palette allow specifiers, developers, and housebuilders to create roofs that blend seamlessly with regional architectural styles. Whether replicating warm traditional clay tones or mirroring natural landscape hues, the range helps maintain local character while meeting modern performance demands.

Behind each attractive tile lies a commitment to robust testing and uncompromising quality assurance. Every Forticrete Gemini tile undergoes extensive in-house laboratory trials and independent third-party testing to validate durability and performance.

These evaluations include: