Waterproofing wet rooms, balconies and terraces against seepage water, especially integrating and selecting the right drains, often causes difficulties. A large proportion of the technical enquiries that reach us via the service hotline concern this topic. With this article, we would like to show you the options HL drains offer in this area and provide a few installation notes.
The number of waterproofing materials being processed is constantly increasing, and their composition often varies greatly. Direct application to the sealing flange of drains, which are usually made of PP or PE, is not possible or only possible with great difficulty, as these materials have very poor adhesive properties and do not bond with other materials. They can only be joined permanently by welding, i.e. by applying heat to a similar material.
As a manufacturer of high-quality floor drains, it has always been and remains a primary objective for HL to ensure a watertight transition from the drain to the waterproofing material. In practice, this means finding materials (usually in the form of a foil) that can be tightly bonded to the drain and also form a durable, watertight bond with the waterproofing material used.
Given the importance of waterproofing drains, it is essential to use suitable products and to ensure professional installation, including hardening. For composite waterproofing, we recommend using non-dispersion-based materials, which must be applied according to the manufacturer’s instructions.
For the HL50 series, cement-based waterproofing must be used, as it ensures optimum adhesion as well as a permanently secure and load-bearing connection with the drain body.
For seamless liquid coatings (PU, epoxy), cement-based composite waterproofing is also required.
For this purpose, we offer both the option of clamping, bonding or welding foils in the form of waterproofing kits and clamping rings, as well as polymer-bitumen collars permanently applied to the drain body at the factory.