Staircase preform with wood trim

A unitary, seamless one piece curved stairway comprising:

• a pair of spaced, curved, generally parallel stringer means extending vertically;
• at least two tread means spaced vertically along and extending between the stringer means and formed integrally therewith whereby the at least two tread means follow the curve of the stringer means to define vertical steps;
• and
• at least one riser means extending between the at least two tread means and the stringer means and formed integrally with the tread means and the stringer means wherein the stringer means, the tread means and the riser means form a unitary, seamless one piece curved stairway.