Balcony Waterproofing for Commercial Decks, Rooftops, and Outdoor Spaces
Long-Term Waterproofing
Balconies, decks, rooftops, rooftop gardens, and other exposed outdoor areas are constantly subjected to environmental stressors such as UV exposure, rain, temperature fluctuations, and structural movement. Without a high-quality waterproofing system in place, these surfaces are vulnerable to water ingress, substrate deterioration, and long-term structural damage—particularly in commercial and multi-residential buildings where durability, safety, and compliance are critical. Versatile waterproofing is especially important in rooftop applications and planter boxes, where standing water, soil, and root systems can introduce additional challenges. A properly specified system must protect both horizontal and vertical transitions while accommodating landscaping finishes.
At LRM Products, we provide advanced balcony waterproofing systems designed to protect outdoor spaces with lasting performance, even in the most demanding environments. Our liquid-applied membranes and surface treatments are engineered for superior adhesion, flexibility, and weather resistance, while also meeting key Australian Standards for external waterproofing applications.
Why Balcony Waterproofing Matters
Water leaks from balconies and decks can result in significant damage to internal living spaces and structural elements below. Issues such as membrane failure, tile movement, and poor substrate preparation are common causes of costly repairs. That’s why effective balcony waterproofing requires a system approach—combining substrate preparation, flexible membrane application, and durable finishing coats tailored to the surface conditions and end use.
Key considerations for waterproofing balconies and outdoor decks include:
Exposure to UV and weather extremes
Substrate movement and material compatibility
Foot traffic and safety requirements
Ability to bridge joints and transitions
Aesthetics and surface temperature (especially in exposed areas)
For Under Tile Balcony Waterproofing please see our Bathrooms and Wet Areas Page.
Accreditations
Standards Compliance and System Performance
LRM Products waterproofing systems have been independently tested to AS 4654.1:2012 – Waterproofing membranes for external above-ground use, meeting the performance requirements outlined for membranes exposed to the elements. Our liquid-applied membranes and coatings are UV stable, highly flexible, and suitable for use over various surfaces including:
- Concrete slabs and screeds
- Fibre cement sheeting and cement board systems
- Structural plywood (exterior grade)
- Existing tiles (with appropriate priming)
- Timber and villa board
Our products are manufactured under an ISO 9001:2015 certified quality management system, supporting consistent performance and reliability across commercial balcony waterproofing applications.
Waterproofing System Options for Decks, Balconies, and Rooftop Areas
LRM Products offers a modular system to suit a wide range of commercial outdoor waterproofing projects, including balconies, decks, rooftop spaces, rooftop gardens, and planter boxes. These areas require membranes that can accommodate movement, resist UV degradation, and form watertight seals around penetrations and drainage points. Our systems are designed to protect both exposed and covered areas, while integrating with a variety of final finishes and landscaping options.
Our systems are also suitable for waterproofing under soil and vegetated areas such as rooftop gardens and planters, where long-term durability is essential. For these applications, correct detailing around outlets and vertical transitions is critical, and our reinforced liquid-applied membranes provide seamless, reliable protection.
Some of the most common use cases include:
Waterproofing over tiles
Apply VersEseal Rapid Build with Non-Porous Primer to seal tiled surfaces without removal.
Concrete and cement board decks
Use Porous Primer followed by VersEseal Rapid Build for a robust, flexible base membrane.
Timber substrates
Suitable with appropriate primers and reinforcement for effective sealing and longevity.
Leaking balconies
Repair cracks and seal transitions with Geo Fabric and Rapid Build, then finish with a suitable surface layer.
It’s important to note that VersEseal Rapid Build is not intended as the final exposed surface on balconies and decks. To complete the system, it must be finished with a durable top layer such as VersEseal TopGrip, and/or overlaid with other surfaces like tiles, outdoor carpet, artificial turf, or resilient flooring—ensuring long-term protection, aesthetics, and safety.
Non-slip finishes
VersEseal TopGrip provides a decorative, light foot trafficable surface with a P5 slip rating for added safety.
Temperature reduction
Select light-coloured Top Coats to reflect heat and enhance surface comfort in sun-exposed areas.
Whether you are managing high-rise balconies, podium decks, communal rooftop spaces, or green rooftop installations with integrated planter boxes, our waterproofing systems provide a seamless, durable foundation that supports a wide range of functional and decorative finishes.
Expertise
Expert Guidance for Every Stage
The LRM Products commercial waterproofing solutions are backed by experienced technical support to guide you through the full application process—from surface preparation to detailing and finishing. Whether you are specifying for a new build, carrying out remedial works, or seeking a system to overlay existing surfaces, our team is available to provide tailored advice and documentation to suit your project requirements.
Recommended Products for Balcony, Rooftop, and Planter Box Waterproofing
For detailed product information and technical specifications for your balcony, rooftop, or planter box waterproofing project, please refer to the relevant products below:
VersEseal Rapid Build
VerseGRIP
Waterproofing membrane with built-in slip-resistant additive, ideal for balconies and outdoor areas requiring a durable, gripped surface finish.
VersEseal TopGrip
Coloured, slip-resistant top coat (P5) for light foot traffic balcony and deck surfaces that enhances appearance.
VersEseal
Porous Primer
Water based primer that promotes adhesion to porous substrates such as concrete, screeds, fibre cement and timber.
VersEseal
Non-Porous Primer
Adhesion-promoting primer for challenging non-porous surfaces including existing tiles.
Contact us today!
Ready to discuss your planter box, deck and balcony waterproofing needs? Call us today on 1300 891 576 to speak with one of our expert team members. We’re here to help you find the perfect solution for your project.