Sandtoft has created a range that offers the natural good looks of slate without the cost penalties that come from installing traditional double lap products. For all its aesthetic qualities, natural slate has limitations in that it cannot be formed into complex shapes. This means that weathertight construction in natural slate can only be achieved by significantly overlapping the slates, threefold at any point. The result is high labour costs, weight issues and performance limitations.
Dual Calderdale – is an interlocking flat concrete tile with an engineered central groove designed to give the appearance of smaller format slates. Flat profile concrete tiles make an ideal cost effective alternative to a natural slate. With their size (10 tiles per m²) and ease of laying such tiles are frequently used for new build residential projects.