Waterproofing under the foundation plate

A complete waterproofing system in new construction includes waterproofing the floor slab. Compared to the application on top of the concrete slab, the installation of the waterproofing layer underneath the foundation plate keeps the foundation dry and the concrete provides a better thermal insulation. KÖSTER provides a wide range of different solutions for completing the waterproofing under the foundation plates with total security.

If the choice is for a liquid application solution, it is necessary to first apply the primer KÖSTER Polysil TG 500 to lock any existing salts in the substrate and provide a better bond between the waterproofing and the substrate. For the liquid option, the choice can be the use of the PMBC system KÖSTER Deuxan 2C (applied in two layers with KÖSTER Glass Fiber Mesh reinforcement) or the novelty hybrid coating KÖSTER NB 4000 that allows the works to carry on even at extremely low temperatures.

For the pre-fabricated membranes, KÖSTER offers the 1.5 mm self-adhesive rubber-bitumen laminated membranes with 2 different top layers (HDPE or Aluminium Foil) called KÖSTER KSK SY 15 and KÖSTER KSK ALU 15. These types of membranes are cold applied, and are extremely easy and fast application, creating an immediate waterproofing effect.

Still in the pre-fabricated membranes, KÖSTER also offers the extremely resistant ECB (ethylene copolymer bitumen) membranes, that are mechanically fastened and/or loose-laid. The overlaps on these membranes are welded using hot air devices, guaranteeing a complete and secure waterproofing seal.

Always adhere to the specifications in the respective Technical Guidelines.

 

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