Schlüter®-TROBA-STELZ-MR | Schlüter-Systems



Schlüter-TROBA-STELZ-MR are plastic rings made of non-decaying polystyrene that are used as installation aids for large format pavers on balconies and terraces. The 25 mm high plastic rings are installed at the cross sections of the pavers over the drainage membrane Schlüter-TROBA-PLUS 8G and remain in the assembly once they have been filled with fresh mortar (preferably pervious mortar).

Schlüter-TROBA-STELZ mortar rings can be combined telescopically, allowing for easy height adjustment of the covering, regardless of the existing slope of the substructure. Once the rings have been filled with mortar, the paver corners are placed on the support pedestals and tapped into position to the correct height and alignment.

The finished covering drains through the open joints between the pavers to the drainage level of the Schlüter-TROBA-PLUS membrane. The drainage water is routed to the gutters by gravity, depending on the installed slope.



  1. The formwork rings Schlüter-TROBA-STELZ-MR are installed on top of the passive capillary drainage mat Schlüter-TROBA-PLUS 8G, which is loosely laid over sloped ( ≥1.5%), weight bearing waterproofing membrane.
  2. TROBA-STELZ-MR are installed at the intersection points of the pavers and filled with fresh mortar (preferably pervious mortar). The mortar should be filled approx. 5 mm over the edge of TROBA-STELZ- MR to allow for proper height adjustment of the pavers.
  3. For height adjustment, TROBA-STELZ-MR can be stacked in a telescopic fashion. The rings are "locked" when the laterally affixed "A" and "B" markings are aligned.



Schlüter-TROBA-STELZ-MR is made of non-decaying polystyrene. The plastic rings have a diameter of 24 cm and a height of 25 mm.

Material properties and areas of application

Schlüter-TROBA-STELZ-MR serve as forms in the production of mortar filled support pedestals used in the laying of large format pavers on balconies and terraces. The material does not decompose, is physiologically safe, and is compatible with bituminous materials.



Schlüter-TROBA-STELZ-MR requires no special or preventative maintenance and will not decompose.

Natural shifts may occur in paver coverings that are loosely installed on paver supports due to one-sided or corner loads.




package = 50 units




Enjoy our videos showing the product itself as well as possible areas of application.

Balcony assembly: Loose installation of natural stone on mortar casting mould rings with drainage

Contact Schlüter-Systems Ltd

Units 3-5 Bardon 22,
Beveridge Lane, Coalville,
Leicestershire, LE67 1TE
Phone: +44 (0) 1530 813396

Quick contact list

Reach the department of your choice directly via email:

Write To Us!

Do you have a question or suggestion?

Further information

on our products and specifications can be found here:

Legend "Products"

We use the following symbols and abbreviations to illustrate our price charts.

image image

= new products

= radius perforation available   


H = height
L = length
B = width

PL = euro pallet 
KV = case packaging 
BV = bundle (there is a 10 item bundle packaging for all the profile types)
P = box packaging 
R = roll
St. = unit