For some architects and specifiers, it can be tempting to rely on familiar materials that worked on other building projects. But that mindset could lead them to overlook viable options for important aspects like roofing. At Soprema, we believe every project is unique and, in this article, we make the case why bitumen waterproofing deserves consideration.
Versatility of application
Bituminous waterproofing systems offer a wide range of potential use cases which many designers might not realise. Their biggest strength is their versatility which makes them suitable for all roof types – whether they are warm, inverted, cold or cool, with applications from large commercial or industrial buildings through to data centres and residential projects.
The versatility of our bitumen waterproofing systems is on display in many innovative projects across Ireland, including : IPC House, 40 Molesworth Street, 1 Molesworth Street and DAA Head Office. And with sustainability now a key consideration for architects, it’s notable that all these projects achieved LEED certification; IPC and 40 Molesworth Street are Gold LEED certified, while 1 Molesworth and the DAA office are Platinum certified.
Flexible properties of bituminous membranes
The most common bituminous membrane is SBS, which in very simple terms involves mixing the styrene butadiene polymer resins with synthetic rubber. This gives it extremely good stretching and bending properties. This elasticity means it can cope with sharp angles and acute details on roofs, such as flat roofs coming down on a 90-degree pitch to meet a gutter.
For a cool climate like we have in Ireland, SBS bitumen membranes are a suitable option because it reacts better to the weather conditions and temperature changes over time, as it can expand and contract as buildings do.
Freedom of choice for hybrid solutions
Bitumen membranes are easily combined with different waterproofing systems, such as liquid waterproofing. This way, architects have the freedom to choose hybrid solutions; for example, where the surface of the flat roof uses bituminous membranes and then specify liquid waterproofing for upstands and detailing.
Even within the Soprema bitumen membrane range, there are multiple membranes available. Our technical experts can advise on which one to use depending on the needs of a specific project. Depending on the makeup of the ingredients, the thickness of the membrane will vary, which allows it to withstand different temperatures, as low as -20 degrees Celcius, for example.
What's more, some layers of the bitumen waterproofing build-up, such as the vapour control and underlay, are self-adhesive which speeds up the installation and reduces the amount of flame used onsite.
Factors for architects to consider
When choosing a waterproofing system for a flat roof, expected traffic levels on the building, and the level of maintenance it will need, must be considered. Bitumen waterproofing membranes are durable, making them suitable for roofs experiencing high footfall. Combining layers of high-quality bitumen can help to ensure a long lifespan over decades. We also strongly advise a regular maintenance schedule for waterproofing systems. Think of it like an NCT. We don’t drive our cars around until they stop working; we have them checked to make sure they’re in optimal condition.
For projects that need to address environmental considerations, our bitumen waterproofing systems are fully compatible with our functional roofs and roof garden solutions including green, blue, brown and solar.
Get in Touch
If you are interested in finding more about our solutions, the technical services we offer, or you are interested in discussing how our systems can be incorporated in a specific project you are working on, please do not hesitate to contact our technical experts. To find out more about our bituminous waterproofing systems, please visit our product page.