Without a newel for support, better materials and/or construction is required for helical stairs compared to spiral stairs. “Winder” or “curved” stairs refer to stairways that make a turn without including an intermediate landing or platform to provide a flat rectangular turning space.
Advantages of Curved Stairs
1- Curved staircases are often very elegant and traditional but this type of design can equally be adapted to contemporary designs.
2- They are relatively easy to walk up (if the radius is large).
Disadvantages of Curved Stairs
1- Curved stairs are by far the most difficult to build of the various types of stairs. In fact building, curved stairs represent a pinnacle of achievement for any stair builder or fabricator. For this reason, they are the most costly to build.
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