A composite material and method for making the same is disclosed. Also disclosed are methods for printing the composite material and devices which are used for printing the composite material. The composite material comprises roving which is impregnated with thermoplastic material via a modified pultrusion method. The composite material is then used in 3D printing of buildings either in combination with concrete printing or alone. The composite material may be extruded in solid form or in a soft form, depending on the extruding mechanism employed by a given 3D printer. The material is printed by 3D printers employing polar coordinate system software and hardware.