Balcony and Terrace Waterproofing

In addition to the installation of the surface, the details play a decisive role. It is not uncommon for poorly executed details to lead to subsequent damage to the overall waterproofing. Owners should therefore choose particularly high-performance products when selecting the materials to be used.

This is the only way to avoid damage that usually affects not only the balcony or terrace, but the entire building.

When it comes to waterproofing balconies and terraces, waterproofing materials should be compatible with the window elements, gutters, railing supports and other connections to make sure there are no gaps. Plus, the waterproofing needs to be able to handle planned and unplanned movements of the supporting structures to avoid cracks and leaks.

CARLISLE® waterproofing systems include EPDM and liquid waterproofing are ideal for making the balconies watertight. Our systems are installed without any naked flames therefore minimising any fire risks. When waterproofing, the entire surface, including all connection details, can be covered with our EPDM membranes including RESITRIX® and HERTALAN® or cold applied liquid waterproofing – ARBOFLEX® PU.  

ARBOFLEX® PU, a cold applied, polyurethane-based liquid waterproofing system, offers an ideal solution. It creates a seamless, fully adhered membrane that adapts perfectly to penetrations and critical areas, ensuring a durable watertight surface.

Various materials are used for waterproofing balconies and terraces, each with its own specific properties and areas of application.

Balcony waterproofing – Which materials are best suited?

EPDM membranes and cold-applied liquid waterproofing systems such as ARBOFLEX ® PU have proven themselves for balcony waterproofing. EPDM membranes offer advantages due to their high elasticity and weather resistance, while ARBOFLEX® PU excels in detailed and irregularly shaped areas, providing a fully bonded, seamless waterproofing solutions with excellent adhesion to a variety of substrates.

Terrace waterproofing – Which materials are best suited?

When waterproofing terraces, it is very important that the materials are able to adapt smoothly to the surrounding structures, such as window elements and gutters. EPDM membranes are also a good choice here, as they can be efficiently adapted to various shapes. For areas where detailing is critical, ARBOFLEX® PU provides a flexible, jointless finish that is particularly suited to complex geometries.

The way in which waterproofing materials are laid and applied is crucial for the longevity and effectiveness of the waterproofing.

Methods of balcony waterproofing

When waterproofing balconies, it is important to choose a method that ensures comprehensive coverage of all surfaces and edges. Methods such as full-surface bonding or mechanical fastening are common practices to ensure that no water leaks or moisture damage occur. Equally important is the adaptability of the waterproofing to component movements in order to prevent cracking. Loose laying of the waterproofing is also possible, as balcony surfaces are covered with an additional wear layer anyway, thus ensuring wind suction safety. ARBOFLEX® PU can be brush or roller applied and offers a seamless finish, it is particularly useful on a balcony with intricate details such as drainage points and railing fixings.

Methods of terrace waterproofing

Terraces require a thorough and detail-oriented waterproofing method. The seamless integration of the waterproofing materials into all connections and edges is particularly important. Methods such as cold-applied liquid waterproofing or hot air welding of EPDM membranes are effective in ensuring a gap free and durable seal. Here, too, it is essential to take component movement into account in order to prevent leaks.