Build a concrete staircase

There are different versions of concrete stairs. Most of them have to be installed by a specialist. However, you can also build a backfilled concrete staircase yourself. What should be considered when building such a concrete staircase, you will find in this guide.

Building materials and stair building techniques

Stairs are usually made of concrete, wood or metal. As an additional material for example for railings glass and plastics are often used. One of the stairs that is used most often is the concrete staircase. While you can in principle make all staircases made of steel or wood or combinations thereof, this is limited to concrete stairs. First, however, the different types of concrete stairs must be distinguished:

  • Prefabricated staircase or elemental staircase
  • Block steps stairs
  • backfilled concrete staircase
  • Supporting bolt staircase
  • beam stairs

Complete yourself: the backfilled concrete staircase

The only staircase, which in principle is completely built on site, is the backfilled concrete staircase. You can either build it yourself or it will be built by the specialist with in-situ concrete. All other concrete stairs, on the other hand, are merely assembled on site using elements or merely fitted in and fastened to the prefabricated staircase. These stairs must be decoupled from the sound, which is why special supports are necessary. With the backfilled concrete staircase this special feature is eliminated.

Applications for poured concrete stairs

But the self-built or cast by the local expert concrete stairs but also used only very limited. In the living area, it is as good as not to find, because the backfill would be lost too much space. In addition, such a concrete staircase is very bulky and architecturally rather unsuitable.

In contrast, the staircase under other construction situations is quite advantageous and rather functional. This includes the use as a concrete staircase in the garden, as an outlying basement outlet or in rare cases as an internal basement outlet. If anything in the interior as a cellar staircase, then usually only in old and existing buildings.

Build substructure

For this, the concrete staircase for pouring on site is particularly good for making yourself, so for savvy home improvement. The basis will be a foundation for which a clean layer of compacted gravel or gravel is first applied. Then a support structure made of hollow concrete blocks is then built U-shaped. To the front (lowest point of the stairs) this masonry remains open.

Fill and compact construction

This masonry is already bricked in the form of later stairs. In order to fit all dimensions such as tread height and length, appropriate calculations must be carried out. Here you will learn everything to calculate a concrete staircase. These gradations in the support structure serve as a support surface for the later concrete steps.

At the same time, however, the resulting cavity between the two longitudinal walls can be filled. For this purpose, earth or sand is used. This drops down the slope of the stairs and must be compacted as best as possible. In addition, the concrete hollow bricks are now reinforced with Moniereisen and filled with concrete.

Board and intertwine the reinforcement mats

Now that the preliminary work has been completed so far, the boarding of the concrete staircase can be performed. It always a frame is constructed, but remains open on the inside of the later treads. The formwork thus comprises only the sides and the front side. In it, the steel meshes are now incorporated.

These are intertwined over the entire length of the staircase and the height, but later necessarily disappear completely in the poured concrete - also on the underside. Otherwise, rust starts here, which continues inside the concrete staircase. The continuous connection of the reinforcement mats serves to prevent subsequent stresses in the concrete stair.

After installing the concrete

Now the concrete can be poured in. It starts at the bottom step and works upwards. The formwork must then stay at least 2 to 3 days at the stairs. It also depends on the weather and the outside temperatures. Also important is the aftertreatment of the concrete during this time. Afterwards, the stairs can be used as exposed concrete staircase or for dressing with tiles, wood or natural stones. Detailed instructions for self-construction of a concrete staircase are available here: Cast concrete staircase.

Tips & Tricks

If the concrete is poured into the hollow stones, but also in the formwork, it must necessarily be compacted immediately and long enough. The concrete must enclose the reinforcements completely without air pockets and a high concrete density must be achieved. More information can be found under "Concrete compacting".

Video Board: How to Build and Pour Concrete Stairs