Schlüter®-BEKOTEC-EN 18 FTS | Schlüter-Systems

Schlüter®-BEKOTEC-EN 18 FTS

Application and function

Schlüter®-BEKOTEC-EN 18 FTS is a reliable covering assembly system for crackfree and functionally safe floating screeds and heated screeds with coverings made of ceramic tiles, natural stone, and other materials.

The floating system is installed directly on load bearing, weight distributing substrates such as concrete or existing timber floor structures. The suitability of the substrate for heating purposes (movement joints, edge strips etc.) must be verified. The system is based on the studded screed panel Schlüter®-BEKOTEC-EN 18 FTS with integrated 5 mm impact sound insulation, which is directly installed on top of loadbearing substrates. An evaluation in accordance with DIN EN ISO 717-2 determined an impact sound insulation improvement by 25 dB. However, the actual impact sound reduction of an assembly depends on the local circumstances (construction system) and may differ from this value. Consequently, the determined test values cannot be generally applied to specific construction site situations. Reliable values can only be determined with direct measurements on site with consideration for the actual construction system. The geometry of the studded panel Schlüter®-BEKOTEC-EN 18 FTS results in a minimum screed thickness of 26 mm between the studs and 8 mm above them. The studs are designed to hold the heating pipes of the system (diameter: 12 mm) in a grid pattern of 50 mm in order to create heated screeds.

The floor heating system is easily adjustable and ideally suited for use with low temperatures, since the screed volume to be heated or cooled is relatively small (approx. 52 kg/ m2 ≙ 26 l /m2 with 8-mm coverage). The curing stresses that occur in the screed due to shrinkage are absorbed by the studded pattern, thus controlling deformations such as curling. It is therefore unnecessary to install dummy joints or movement joints in the screed. As soon as the cement screed is ready to support weight, the uncoupling mat Schlüter®-DITRA 25 can be installed (calcium sulfate screed ≤ 2 CM-%). Ceramic or natural stone tiles are then installed directly over this layer, using the thin-bed method. Movement joints in the covering layer are created using Schlüter®-DILEX according to industry guidelines.

Cover materials that are not susceptible to cracking, such as parquet or carpeting, can be directly installed over the screed as soon as it reaches the necessary residual moisture level for the corresponding covering. See the Technical Manual for further details.

Schlüter®-BEKOTEC-EN 18 FTS


  1. Schlüter®-BEKOTEC-EN 18 FTS is installed on a sufficiently load-bearing and level substrate. Uneven sections must be levelled in advance.
  2. Adhere the 8 mm edge strip Schlüter®- BEKOTEC-BRS 808 KSF in places where the covering adjoins walls and other construction elements. The edge strip features an adhesive segment on the top and bottom for secure attachment. The adhesion of the strip on the substrate and the pre-tensioning of the integrated foil leg push the edge strip toward the wall. When the studded Schlüter®-BEKOTEC panel is laid on top of the adhesive strip, the panel is permanently adhered to the substrate and flowing screed can no longer get beneath the panel.
  3. The studded Schlüter®-BEKOTEC-EN 18 FTS panels must be cut to size in the peripheral areas to avoid sound bridges. To connect, snap the studded panels into the tapered connection studs in the edge areas as shown in the picture. In door transition areas and near distributor boxes, the smooth levelling panel Schlüter®-BEKOTEC-EN FGTS may be used to simplify the pipe installation. This panel is used underneath the studded panels and is adhered with double-sided adhesive strips. It may be necessary to remove the impact sound insulation of the studded panel in the transition area. The self-adhesive pipe clamping strip Schlüter®-BEKOTEC ZRKL 10/12 allows for precise routing of pipes in these areas.
  4. To create a Schlüter®-BEKOTECTHERM ceramic thermal comfort floor, the system pipes with a diameter of 12 mm are now clamped between the cutback studs. The spacing of the pipes must be determined on the basis of the required heating output, as shown in the Schlüter®-BEKOTEC heating diagrams.
  5. As part of the screed installation, cement screed with strength class CT-C25-F4 (ZE 20) or calcium sulfate screed CA-C25-F4 (AE 20) is installed with a minimum screed cover of 8 mm over the studded panels. The flexural strength of the screed may not exceed F5. The screed thickness may be increased to max. 20 mm above the studs for levelling. To avoid sound transmission between individual rooms, the screed should be separated in these places, using the expansion joint profile Schlüter®- DILEX-DFP.
  6. As soon as the cement screed is ready to support weight, the uncoupling mat Schlüter®-DITRA 25 may be installed in accordance with the manufacturer’s recommendations (see product data sheet 6.1). Calcium sulfate screeds may be covered with Schlüter®-DITRA 25 as soon as they have reached a residual moisture level of < 2 CM-%.
  7. Ceramic tile or natural stone can be directly installed on top of Schlüter®- DITRA 25, using the thin-bed method. The ceramic covering must be divided into fields with movement joints above Schlüter®-DITRA 25 in accordance with the applicable regulations. We recommend the movement joint profiles Schlüter®-DILEX-BWB, -BWS, -KS, or -AKWS for creating movement joints (see also product data sheets 4.6, 4.7, 4.8 and 4.18).
  8. Our corner movement profiles Schlüter®-DILEX-EK or –RF (see product data sheet 4.14) can be used as a flexible edge joint in wall/floor transition areas. The protruding sections of the Schlüter®-BEKOTEC-BRS edge strip should first be trimmed.
  9. The Schlüter®-BEKOTEC-THERM ceramic thermal comfort floor is ready for heating just seven days after the completion of the cover assembly. Increase the supply temperature by a maximum of 5 °C a day to reach the desired operating temperature, starting from 25 °C water temperature.
  10. All other covering materials that are not susceptible to cracking (e.g., parquet, carpeting or synthetic coverings) can be directly installed over the Schlüter®-BEKOTEC screed without the Schlüter®-DITRA 25 uncoupling mat. The height of the screed must be adjusted to the corresponding material thickness. In addition to the applicable installation guidelines, note the permissible residual moisture level of the screed for the selected covering material.

Schlüter®-BEKOTEC-EN 18 FTS


Schlüter®-BEKOTEC-EN 18 FTS with 5 mm impact sound insulation is made from a high-impact polystyrene deep drawn foil. The impact sound fleece is made of a special textile blend. Schlüter®-BEKOTEC-EN 18 FTS is suitable for use with conventional cement screeds of strength class CTC25- F4 (ZE 20) or calcium sulfate screed CA-C25-F4 (AE 20) as well as poured/ flowing screed.

Schlüter®-BEKOTEC-EN 18 FTS


Schlüter®-BEKOTEC-EN 18 FTS, -ENFG and -BRS are non-rotting and require no special maintenance or care. Before and during the installation of the screed, the studded screed panel may need to be protected from mechanical damage with suitable measures, such as laying out timber boards.

Schlüter®-BEKOTEC-EN 18 FTS


Schlüter®-BEKOTEC-EN 18 FTS

Schlüter®-BEKOTEC-EN 18 FTS



Advantages of the Schlüter®-BEKOTEC system

  • Warranty:
    Schlüter-Systems offer a five-year warranty for the life of the covering assembly, provided all installation instructions were observed and the covering is used as intended.
  • Crack-free covering:
    The Schlüter®-BEKOTEC system is designed to reduce shearing tensions in the screed within the grid of the studded panel. No construction reinforcement is required.
  • Curl-resistant construction:
    The cover assembly of the Schlüter®- BEKOTEC system is free of inherent stresses. Consequently, curling is virtually impossible to occur in the area. This is especially applicable in the presence of temperature fluctuations, for example with heated screeds.
  • Joint-free screed:
    The regular patterns of the Schlüter®- BEKOTEC system evenly reduce tensions in the screed, which allows for constructing the screed without movement joints.
  • Movement joints in the joint pattern of the tile or stone covering:
    With the Schlüter®-BEKOTEC system, the design of movement joints can match the joint pattern of the tiles or stone covering, since it is not necessary to continue construction joints from the screed into the surface covering. The applicable regulations for the dimensions of the covering pattern must be observed.
  • Short construction time:
    As soon as the screed produced with the Schlüter®-BEKOTEC system is able to support weight, coverings of ceramic tile, natural or artificial stone can be directly installed on top of the Schlüter®-DITRA 25 membrane. Ceramic thermal comfort floors are ready for heating only 7 days after the completion of the cover assembly.
  • Material savings:
    Just 40 kg/m² ≙ 20 l /m² of screed are required with a screed cover of 8 mm.
  • Fast-reacting heated floor assembly:
    Compared to conventional heated screeds, cover assemblies installed with a Schlüter®-BEKOTEC system react much faster to temperature changes, since the volume to be heated or cooled is much smaller. Consequently, the heated floor system is particularly suitable for operation at low temperatures.

Schlüter®-BEKOTEC-EN 18 FTS

Technical data

  • Stud size: approx. 40 mm
  • Grid spacing: 50, 100, 150 mm ...
  • Diameter of system heating pipes: 12 mm
  • The studs have a cutback design to securely keep heating pipes in place without the need for clamps. 
  • Connections: The studded panels are connected by overlapping a row of studs and clicking the panels together.
  • Working area: 1.4 x 0.8 m = 1.12 m2
  • Panel height: 23 mm (including 5 mm impact sound insulation)
  • Packaging: 10 units/box= 11.2 m2
  • Box size is approx.: 1500 x 855 x 185 mm.

Schlüter®-BEKOTEC-EN 18 FTS

Contact Schlüter-Systems Ltd

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

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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