This is the top favourite among our patterns. LDC ALTA has a concealed mounting, which gives your facade 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® Poplar has a smooth, even structure and is knot-free. Due to its light weight, Thermo-D Poplar is easy to handle. Thermo-D Poplar from LDCwood®, both European and North American, is always FSC®or PEFC certified.