How good waterproofing can deliver quick access for other trades

Historically, roof waterproofing for new builds, has been a challenge for the construction industry, particularly those incorporating concrete decks. Conventional systems can typically require long curing periods and multiple layers to achieve the desired level of protection. These delays can postpone the installation of essential rooftop services - such as HVAC, solar panels and communication equipment - and can have a cascading effect on the commencement of interior work.

As project timelines tighten and budgets become ever more constrained, there is a growing need for waterproofing solutions that can be applied rapidly without sacrificing performance or longevity. It is one of the main reasons why products such as Proteus Cold Melt® with its capacity to accelerate project timelines is being increasingly specified. The ability to lay a Cold Melt® over green concrete in just three days, to effectively waterproof the building, compared to the normal 28 - means that other critical services – can get to work almost immediately. Once finished, the system is then BBA certified to last for the lifetime of the substrate on which it is installed.

All of this is in response to recent trends in construction, which have pushed for methods and systems that not only provide robust waterproofing, but also integrate seamlessly into the overall building process. This is particularly important for projects with innovative roof designs, such as green roofs or multi-functional podium roofs, where time is of the essence and efficient integration of systems is crucial.

Cold Melt®, a cold-applied waterproofing system formulated to deliver a seamless, elastomeric membrane, meets all of these demands. The system incorporates recycled rubber crumb and organically grown products, creating a versatile material that adheres to a variety of substrates - including concrete, asphalt and timber. Its formulation is particularly engineered to offer rapid curing.

This quick turnaround time is especially beneficial in modern construction. By accelerating the waterproofing process, contractors can quickly move on to installing critical services on the roof. This not only reduces the risk of weather-related damage during extended curing periods, but also creates an environment where indoor trades can start their work without waiting for prolonged completion of external waterproofing layers.

The technical benefits

While rapid application is a standout feature, the Cold Melt® system also delivers several additional technical benefits. The material is designed to adhere to a wide range of surfaces. This flexibility is particularly advantageous in complex projects where different parts of a building might use varied materials - whether its concrete, asphalt, or timber. The ability to apply a uniform, seamless waterproofing membrane over these diverse substrates simplifies the construction process and reduces the need for multiple specialised products.

The absence of seams in the applied membrane is also a critical feature. Seams are often the weak links in waterproofing systems, prone to cracking and water ingress. By providing a seamless layer, the system minimises potential failure points, offering a more reliable barrier against water penetration. Its elastomeric properties also mean that it can flex with the natural movements of the building without cracking or becoming brittle, ensuring long-term durability.

An increasingly important aspect of modern construction is sustainability. The incorporation of recycled rubber crumb and organically grown products into Cold Melt® enhances the material’s performance. Using recycled and natural components further reduces the environmental impact and supports sustainable building practices.

The development of fast-applied, cold-curing waterproofing membranes marks a significant advancement in construction technology. Systems such as Cold Melt®, which can be applied over green concrete in a matter of days, offer tangible benefits in terms of project acceleration, inter-trade coordination and overall budget management.

This evolution in waterproofing technology also reflects broader trends in the construction industry - developments that emphasise efficiency, safety and sustainability. It is not simply a matter of replacing old methods with new ones - it is about rethinking the entire approach to project delivery. By addressing traditional bottlenecks and enabling a smoother workflow, these advanced waterproofing systems help keep projects on schedule and within budget.

However, in the end, the discussion around these modern waterproofing techniques is not about promoting a single product, but rather about understanding how innovative approaches can address long-standing challenges in construction. As contractors, project managers and other tradespeople continue to seek ways to accelerate project timelines and reduce costs, the adoption of fast-applied, cold-curing waterproofing systems represents just one of the many tools available to achieve these objectives. Systems such as Cold Melt® are just the beginning.