Long-lasting waterproofing for basement exteriors

There are standards that regulate the waterproofing of components in new buildings. However, this is not the case for existing buildings. Planning is done on the basis of preliminary investigations to determine the causes of damage in accordance with WTA Leaflet 4-6 “Subsequent waterproofing of building elements with ground contact”, and the work must also be implemented and documented accordingly. The water impact, usage and crack-bridging classes are determined in accordance with DIN 18533. Changes caused by the construction measures themselves, as well as other stresses and loads, must also be considered.
According to WTA Regulation 4-6, both non-crack-bridging and crack-bridging MDS, FPD and PMBC products are approved for waterproofing on prepared substrates.

Optimum safety with MB products from Remmers

Remmers FPDs have national test certificates (abP) according to the PG-MDS/FPD and PG-FBB testing principles and can be used for all types of water impact.

Subsequent exterior waterproofing on old bitumen

Before waterproofing can be carried out, the building elements must be exposed and the type and condition of any existing old waterproofing must be assessed. In the case of old waterproofing containing bitumen, it must be checked that this is firmly connected to the substrate, and any loose material that could impede adhesion must be removed. It is not necessary to completely remove the old waterproofing. In order to account for the elevated moisture load in the wall/floor connection, the old waterproofing must be removed back to the mineral substrate in these areas only, and preliminary waterproofing must be carried out with Remmers moisture penetration protection. To achieve optimum bonding between the new and old waterproofing, MB 2K provides a bonding layer that is both easy to work with and highly effective. If required, the subsequent exterior waterproofing on old bitumen can also be carried out with other products from the MB product range.
Subsequent exterior waterproofing on mineral substrates

In many old buildings, basement walls in contact with the ground are waterproofed only with render, packed clay, or – as is often the case – nothing at all. However, such substrates are ideal candidates for subsequent exterior waterproofing because they create an excellent environment for applying modern waterproofing materials.
Pipe penetrations

The more extreme the stresses, the more important it is to guarantee the reliability of waterproofing in especially sensitive areas. Penetrations are a particular example of this, and can prove to be an especially critical area. The Remmers pipe flange system has been proven to stay waterproof at immersion depths of up to a 5 m water column. In this system, the pipe flange is permanently and safely bonded to the substrate and the pipe. This configuration ensures an optimum bond between the pipe penetration, the pipe flange and BIT 2K [basic], MB 2K or other products from the MB product range.
Building joints

Even though Remmers FPDs and PMBCs have excellent crack-bridging properties, movement joints in the building require special solutions. In this system, they are sealed off with Remmers joint tape. This special tape has a tension zone for reliable absorption of movements, meaning that even relatively large movements in the building materials do not cause leaks. Remmers Tape B 240 E joint tape has two end pieces, meaning that there is no need for laborious adhesive bonding work when waterproofing a semi-detached house, for instance. Thanks to its special laminated material, the tape can be embedded in the joint-edge regions when using waterproofing slurries and bitumen systems.

Application instructions

Our application instructions for subsequent external waterproofing explain the correct procedure step by step in order to achieve long-lasting, reliable results.

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