This is the top favourite among our patterns. LDC ALTA has a concealed mounting, which gives your façade or project a smooth look. This pattern can be fire-retardant treated with the 100% natural fire-retardant Burnblock® to the desired reaction to fire class. LDCwood® ThermoWood® spruce has a smooth and even structure with smaller knots than pine. Thermo-D spruce is ‘centre cut’, the best quality, which ensures a stable and shape-retaining plank. Thermo-D spruce from LDCwood® is always FSC® or PEFC certified. Smooth connections and loyal partnerships with the sawmills help to ensure a low ecological footprint.