Execution of exterior coverings with reduced door connection heights

The connection height of 15 cm from the upper edge of the covering (as required by DIN 18195) is impractical (a high, inconvenient stumbling threshold must be accepted) or it is also often not feasible due to a lack of installation heights. According to the flat roof guidelines, the connection height can be reduced to 5 cm, if water accumulation is prevented by an appropriate drainage method in the immediate door connection area. For such applications, Saint-Gobain Weber offers a safe solution with suitable components. With this system set-up, thin-layer balcony or terrace constructions with ceramic coverings can be executed. For such constructions there is a system partnership with the company Gutjahr.

Simple & safe to the goal

  1. Substrate preparation

    1. The surfaces of balconies and terraces must have a slope towards the free edges or eventually the floor run-offs of min. 1.0%, max. 2.5%.

  2. 2. The screed surfaces must be free of adhesion-impairing particles and flat. Levelling works and gradient works are done with the quick-setting levelling mortar weber.plan 819.

  3. 3. First, the appropriate border profiles Watec Drain DP 21 (company Gutjahr) are fixed on the substrate and then tightly screwed *).

  4. 4. Apply the primer weber.prim 801 on the substrate. The quick-drying multi-use primer weber.prim 804 will also do.

  5. 5. In corners, expansion joints, butt joints and movement joints first insert all the necessary components of the sealing system weber.tec 828 (such as sealing tape as well as inner and outer corners) into the freshly applied layer of the mineral slurry weber.xerm 844. The connection of door or eventual window frames is done with the self-adhesive sealing tape weber.tec 828 SK.


  6. 6. Cover the edge profiles full-surface with weber.xerm 844, press the sealing tape weber.tec 828 DB G or 150 and bond.

  7. 7. Then weber.xerm 844 is applied full-surface in 2 layers.

  8. 8. After drying of the mineral slurry weber.xerm 844 it is recommended to use an insulation foam strip for the movement joints in angles with all adjacent building parts/walls.

  9. 9. The thin-layer drainage channels Watec® Drain KP are laid lose on the waterproofing level with butt joints and without tension up to the edge profile *).

  10. 10. The extremely flat drainage channel Watec® Drain RD-QE is used for a norm-compliant application with a reduction from 15 to 5 cm on low door thresholds.

  11. 11. For this purpose, stick the drainage channel DiProtec® AB-KV by applying dots of the adhesive mortar onto the back of the pre-said channel. The thin-layer drainage Watec® Drain KP is left out in this area.

  12. 12. Lay the drainage channel Watec® Drain RD onto the mortar beads (for ex. the temperature-independent setting flexible adhesive weber.xerm 859 F) and align it with a forward slope *).

  13. 13. Cover the reinforcement fabric of the upper supporting layer (approx. 3 mm) step by step, e.g. with the quick-setting and flexible flow-grade tile adhesive weber.xerm 860 F, …

  14. Tile fixing

    1. …pour the pre-said flow-grade adhesive and comb down a uniform adhesive bed with the notched trowel at an angle of 45° - 60°.

  15. . *) Follow the recommendations of the company Gutjahr

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