UK Stair Parts

What Are Stair Parts Called?

Posted on Fri January 5th 2018 by Dan

When refurbishing, rebuilding or renewing your staircase, it’s important to understand the various components to make sure you get everything you need. Here, we go through all of the various stair parts and what they are called to help you achieve your dream staircase.

The Different Parts of a Staircase


Looking at the image above of a standard staircase, the various parts are:

  1. Inner string (closed)/skirting board
  2. Outer string (open)
  3. Tread
  4. Riser
  5. Newel Post
  6. Spindle
  7. Handrail
  8. Nosing
  9. Fascia
  10. Landing
  11. Curtail (where finishing newel post would stand)

Inner String (closed) or Skirting Board

The side of the staircase that is against the wall. The threads and risers are attached to the inner string. This may also be skirting board that continues up the stairway.

Outer String (Open)

The outer string runs along the side of the staircase and is open to view, if you have this style staircase.


The tread is the part of the stairs that you stand on.


The riser is the vertical part of each step, depending on your style of staircase, you may or may not have these. Closed staircases do have them, open (floating staircases) don’t.

Newel Post

The newel post is the vertical post that marks the end of the stairway or a turn in direction of the staircase. This is usually larger than the spindles and handrail.


The spindles are the vertical posts that run along the side of the staircase, between the handrail and baseball. These could be made of wood, metal or glass, depending on the style of staircase you have.


The handrail is the part of the stairway that users hold onto should they need to. It runs along the top of the spindles and joins the newel posts together.


The moulding that is usually found on the sides of the stairway that overhang on the step. This is also where the spindles meet the step. This is more of a decorative feature.


The fascia is a covering of the floor, at the top of a staircase. This acts as a continuation of the outer string, that covers any exposed flooring.


The landing is the flooring of the upper level of your home.

Curtails (where the finishing newel post would stand)

The curtail step is usually at the bottom of the staircase and is where the finishing newel post sits. The curtail often curves round as a decorative finish. The handrail often mirrors this with the addition of a decorative end cap or the newel post.

Standard Stair Parts

The above is based on the standard staircase that can be found in most homes. The basics of a staircase structure remain the same, even if you opt for a round staircase, or a floating staircase. Small elements of this may change, depending on the design and build of your home.

If you are building your own staircase from scratch or revamping your current staircase, you may find the above helpful in working out which stair parts you need and the quantity of stair parts needed to complete your design.

Get in touch

If you are refurbishing your staircase or building one and are in need of stair parts, contact us today on; 01268 284 000. Our team of experts are more than happy to help, no matter what your requirements are.