Start by figuring out how high the staircase should be. Here you need to measure from (finished floor) ground floor to finished floor on 1st floor. Floor-to-floor height (H). Find the DOLLE staircase you think will fit. Under each DOLLE staircase you will find precise measurements for the staircase in the DIMENSION-file under the product page.

If your floor-to-floor height (H) is e.g. 260 cm, you can use a staircase with 11, 12 and 13 treads. More treads provide a lower rise height (S) of the staircase. If you want comfortable staircase to climb, you should choose a rise height in the range of 18-21 cm, but if you want the stairs to take up less space in the room, you can choose a higher rise. At a high rise (S) you will find that the staircase is steeper to climb.


The type of your staircase depends on the dimensions of the room. A quarter turn staircase can be more space-saving and provide a good central entrance to the stairs. It can also make you fit one tread or 2 more this means you will have a narrower distance between the treads make the staircase more comfortable to climb. We recommend 18-21 cm in height.

In our DIMENSION (drawings and dimension under each staircase) you can see how much space each staircase will use in your room.


Tip: Draw the staircase on the floor with tape.


Measure the width and length of your opening size (incl. flashing). The width of your stair opening (N) can determine which staircase may suit your project, this will also tell you how big to make your opening stairwell. It is recommended that the opening width is at least 7 cm wider than the stairs including railings when the stair is mounted with railings on one side. If railings are to be installed on both sides of the stairs, the opening must be at least 10 cm wider than the staircase including railings. 
For spiral staircase the opening size must also be 10 cm wider than the diameter of the staircase.

Opening length (M): The opening must go so far beyond the stairs that from the bottom edge of the opening there is a headroom of at least 200 cm. Headroom (E) is the measurement between your ceiling and the tread that lies vertically below.

Example: Quarter turn staircase - right or left turn from DOLLE DIMENSION on each staircase you have chosen.

The red dotted line on the drawings shows how large the staircase opening must be length (M) and width (N) to maintain headroom from tread (or floor) to ceiling of 200 cm.


Take the measurement from ground floor ceiling to finished floor on first floor (Z).
In order for the staircase to be mounted securely, you must ensure that the deck surface against which the stairs are mounted has a reasonable height of at least the staircase rise height (S) + 2 cm. This means that if your rise height is 20 cm then there must be at least a stable vertical surface with a height of 22 cm on which the top element of the stairs can be mounted.

Illustration from the assembly instructions.

The height of the stairs is measured from the floor where the staircase starts, to the floor where the stairs end (H). The measurement of the ceiling height of the room + the deck thickness (Z). Remember to consider any unevenness in the floors, which can cause a difference between the measuring point and the place where the stairs will begin and end.


Slanted ceilings can affect the headroom (E) of the stairs and the end of the horizontal railing on next level floor.
Tip: Draw the stairs on the floor with paint tape and then draw the steps on the wall and make a check measure for the headroom (E).

See how easy it is to mount a DOLLE staircase