When Carillion and partner HLM Architects were looking for materials for 13 new build primary schools in Barnsley they knew they had to be robust, low maintenance and sustainable. At King's Oak, Kalzip's Falzinc raised seam roofing met all the criteria.
Falzinc uses a patented Pegal process to encase the aluminium core of the raised seam with a pre-weathered zinc layer that has a lower weather erosion rate than zinc and is long living due to the saline resistant substrate.
The weathering treatment gives the zinc surface a mid grey shading - the appearance of approximately three-year old natural zinc.
At King's Oak the sheets were fixed with associated flashings and fascias as well as gutters to prevent run off from cedar boarding above roof levels affecting the zinc.
Because cedar board rain run-off attacks the surface of zinc care was needed throughout construction and secret gutters were built to prevent future damage.
The perforated range of façades from Kalzip has been extended to include two new shapes.
Originally launched with circular perforations, the range now incorporates façades with elliptical and cruciform perforations,
The façades can be used as lightweight solution to shading a building from the sun, and can also protect from wind damage. The aluminium itself is inherently resistant to corrosion and can stand up to the climate in coastal areas.
Available in four standing seam profiles, the façades can be concave or convex curved, and can be purchased in stucco embossing, patina or a colour coat finish.