Hightech Meets Design
For Your Convenience
Custom-Made and Exclusive
Self-Supporting Cantilever Staircase
Exclusive Fair-Faced Concrete Products
Interior and Exterior
Velvety Soft Haptics
Highest Quality Rating & Function
naturalness, elegance & warmth
Passion for High Performance Concrete

RoomStone® Stairs

Technical Details

Technical Properties of the Click-Systems

Materials available: Fair-faced concrete, wood, dimension stone

Lengths available: Standard up to 1185 mm, custom lengths up to 1500 mm

Thickness: 90mm

Available widths:

  • Fair-faced concrete: 26, 28, 30, 32 cm
  • Wood and dimension stone: 25 to 35cm
  • Other widths available upon request

Stain protection / surface treatment:

  • Fair-faced concrete and dimension stone: Permanent protection, 3 fold surface impregnation
  • Wood: Naturally oiled and lacquered, no colour-staining

Bearing load: In accordance with DIN 1055 up to payload group T3

Construction staircase: Available upon request

Staircase removable/exchangeable after installation: Yes

Can I organize / execute assembly of installation parts myself?: Possible

Can I organize / execute assembly of construction staircase myself?: Yes

Can I organize / execute assembly of RoomStone® staircase myself?: Possible

Soundproofing assessment in accordance with DIN 4106 supplementary sheet 2:

  • Click 2.0 with wooden steps: L´n.w<= 58dB
  • Click 2.0 with fair-faced concrete or dimension stone steps: L´n.w<= 62dB
  • Click 2.0 soundproofing level for fair-faced concrete, dimension stone, or wood: L´n.w<= 46dB, fulfils increased soundproofing requirements

Skid-protection in accordance with DIN 51130: All materials achieve R10. Higher requirements can be achieved by applying a different surface treatment method


  • For fair-faced concrete and dimension stone: Exclusively class A1 materials, non-flammable
  • Wood: Flammable B2, steel fixation elements: Non-flammable A1

Tolerance compensation during final assembly is possible within the following limits:

  • Incline axis level lengthways: +-2.5°
  • Incline axis level lateral: +-2.5°
  • Orthogonal rotation axis to wall: +-7°
  • Longitudinal axis step-height: -3 mm to +5 mm

The following information must be available prior to shipment:

  • Longitudinal axis step-height: Can be established following consultation with the customer or onsite measurement. Individual steps cannot be shortened onsite.

Fixation options for fall protection:

  • Front-end M10 threaded bushings for holding glass point mountings
  • Welding plates (only for fair-faced concrete steps)
  • Cone bracket for holding handrail beams (only for fair-faced concrete)
  • All typical wooden connecting elements for our wooden steps

Integrated lighting: Is available for all steps. The standard lighting consists of an LED ribbon with sockets hidden in the Click-System element. Can be removed or exchanged at any time.

Step protection during construction phase: Available. Step protection consists of a textile liner and OSB boards which protect the stairs from mechanical damage. Step protection does not protect against liquids.

Stair landing / Pedestals: Available upon request

Is it possible to attach the staircase to rounded walls?: No

General Requirements of RoomStone® Click System 2.0

A level reinforced concrete wall with a minimum strength of 20 cm is required for mounting RoomStone® stairs. The structural engineer must ensure that the wall exhibits a carrying load which is suitable to bear the weight of the staircase and auxiliary structures. It is possible to produce the enforced concrete wall right on the construction site or, alternatively, produce it at our production facility and ship it to the construction site where it is subsequently put in place. In order to be able to ensure a precise alignment of the steps’ frontends, the levelness of the wall must correspond to the increased requirements for prefab-walls as described in DIN 18202. If there are any bumps or other types of unevenness in the wall that may cause differing length requirements for the individual steps, please ensure that you notify RoomStone® prior to production and shipment of the stairs. The steps will then be produced in different lengths in order to precisely fit the parameters of the wall.

We are happy to provide you with expert assistance regarding the correct measuring of the wall. Please do not hesitate to contact our customer service department regarding this matter. Please note, that in the case of floor breakthroughs, ceiling openings, or other lateral obstacles we require opening dimensions of “length of step plus 5 cm” so that we can attach the fixation elements of the steps to the fixation elements of the wall. The tolerance for superstructures on top of floorings in the neighbouring upper/lower storey is limited to a maximum of 0.5 cm. It is not possible to subsequently apply any greater tolerance compensation than this. A further prerequisite for installing our cantilever staircase is the availability of precise and binding markings (cutting checks) in the framing / structural work that are valid all the way from commencement of construction to its finalization.

Option 1: Mounting of Installation Parts to a Wall That Was Created Onsite

After the wall formwork for the stairs has been created, the installation parts are put in place. Our technicians insert the parts with utmost precision and care. That is why we can ensure that the stairs are later mounted exactly the way they are meant to be. This basically sums up the first step of this construction method. It is possible that sufficiently skilled non-RoomStone craftsman do this job, however, we do not provide any warranty for external services that are rendered or follow-up costs which may arise because external craftsmen performed an imprecise service that inhibits the correct installation of our products.

The next step of this construction method consists of the onsite reinforcement process and the placing and bracing of the formwork. Now the pouring of the concrete can commence. After the formwork has been stripped, an optional construction staircase with handrails can be installed. These interim stairs are attached by hanging them from the previously installed fixation elements. The construction stairs are generally installed by the building contractor (this is a usually a very simple and quick process). Only the handrail boards need to be provided by the customer, as these are too large for transport and are generally always available on construction sites anyway.

Option 2: Using a Prefab-Wall

If you wish to use a prefab-wall, there are two modes of operation. If the prefab-wall is a solid variant, it must be at least 20 cm thick. The solid wall must not be rigidly attached to the subfloor. The wall is attached to the subfloor via elbow unions and attached to the concrete ceiling via cantilever reinforcement bars/rods.

If the prefab-wall is an element wall (double wall), then it must be at least 24 cm thick. It is attached to neighbouring parts via state-of-the-art connection irons, which are inserted into the hollow insides of the double wall. The frontend of the double wall must be scaled. The wall can subsequently be filled with concrete when the concrete ceiling is poured.

The installation parts are already precisely embedded in to the concrete when the prefab wall (either one of the options) is produced. Please note, that the usage of prefab walls entails significant costs due to transport and the necessity of a crane.

Recommendations for Plastering Walls

Please note the following if you wish to plaster the wall:

If the plastering system consists of an undercoat plaster and a finishing coat, wallpaper, or subsequent layer of paint, the following must be considered:

The steps must be placed and mounted with a shadow gap / vanity line of 3-5 mm between the step and the concrete wall or installation part. These parameters are necessary for the connection system. Please note, that the undercoat plaster is generally thicker than the covering layer. In order to be able to achieve a smooth and even surface, we recommend that you apply the undercoat plaster prior to the assembly of the stairs. The installation parts must be cleared after the plaster has been applied.

After the plastering process has been completed, RoomStone® can execute the initial drilling and assembly procedures. The position of the stairs is sketched on the wall and the necessary holes are drilled into the wall. Now the plaster in proximity of the individual steps must be removed by our craftsmen (the plaster that needs to be removed equates to an excess of 1 cm of the steps’ cross section). Following this procedure, the steps of the staircase can be installed.

Painters should now touch up the damaged areas of the plaster. Please note, that his process is not part of the services that RoomStone® offers. The plaster can range all the way up to the steps without requiring an elastic band or an elastic joint. After these steps of the process have been completed, the finishing coat, wallpaper, or subsequent layer of paint can be applied.

If only a finishing coat of plaster is to be applied to the wall and this coat does not permit subsequent transitions, it is advisable that the plaster be applied after the stairs have been installed.

Wall Formwork Recommendations for Walls That Were Created Onsite and Fair-Faced Concrete

The installation parts are attached to the formwork via screws (3.0 x 20 mm). A total of four screws are required per step. Even though is not easy to subsequently undo the screws, it is possible nonetheless. The formwork may be damaged by cracks near the screw-points when the screws are removed and the formwork is therefore generally no longer suitable for further production of premium fair-faced concrete after it has been used once.

If the wall is to be plastered, it is advisable to use old formwork facing. In the case of fair-faced concrete walls, we recommend that new multi-layer boards (d >= 12 mm) be used to plank the formwork. If a planking technique is applied, the desired appearance of the gaps/joints can be achieved via special techniques. The parting agent that is used in the process must be applied evenly and thinly. It must also be evenly wiped away afterwards.

The concrete used must correspond to consistency class F4 or higher. Self-consolidating properties are desirable, but not necessary. Only very little shaking energy is required to consolidate the concrete. The most suitable shakers for this process are formwork shakers or thin concrete vibrators with low sphere of activity. Due to its consistency class, the formwork is very difficult to brace and construct robustly. The maximum particle size should ideally not exceed 16 mm and fine particles should be the predominant component of the mixture. It is not necessary to implement a smaller maximum particle size.

The reinforcement must not touch the formwork and the concrete pouring process must be executed correctly. A slow yet consistent pouring speed is ideal. After the concrete has been poured, the surface must immediately be covered with a protective foil. This minimizes the risk of shrinkage cracks.

The fair-faced concrete wall must remain in its formwork for at least three days. This period may differ if frost occurs and the temperature of air falls below the freezing point of water. After the formwork has been removed, the wall must be protected from draught and excessive dryness for at least two weeks. The final colour may differ depending on the type of concrete that was used. It is absolutely necessary that prior consultation with the supplier of the concrete is sought in order to view samples of the finished product. Granulated slag and pozzolanic/fly ash cement can cause an initial blue colouring of the wall. Even though this colouring will fade away with time, the fading process can, in some cases, take a considerable length of time.

Safety Notices Regarding Fall Protection

RoomStone® does not provide any fall protection measures. We do, however, offer optional fixation elements or anchorage points to suit the type of fall protection you wish to implement.

We would like to expressly point out, that the locally applicable building rules and regulations must be adhered to, and that these regulations generally demand that fall protection measures be put in place by the building contractor. We also make a point of reminding every building contractor and architect of his obligations with regard to fall protection. If no fall protection measures are implemented, all ensuing responsibilities and liabilities lie with the contractor, architect, and builder – and expressly not with RoomStone®.

Our construction staircases are all equipped with handrails. The handrail boards need to be provided and attached by the customer.

Please consult the download area for more details and sketches regarding our individual product groups.

Additional Links