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Waterproofing Membranes For Flat Roofs

Waterproofing membranes for flat roofs are specialised materials designed to protect flat roofs from water infiltration.

They come in various forms such as sheet membranes, including self adhesive roofing membranes, and liquid membranes to include both cold and hot applied.

Waterproofing Membranes For Flat Roofs

Different Types of Waterproofing Membranes

Each type of membrane has its advantages and considerations, and the choice depends on factors such as roof design, roof substrate, budget, climate, and building use to name a few.

Ultimately, membranes for flat roofs play a crucial role in keeping your building watertight, ensuring its longevity.

To learn more about our waterproofing membranes, scroll down for more information below or contact our team.

A roll of EPDM membrane

EPDM Membranes

EPDM Membranes are made from synthetic rubber. This type of flat roof membrane is known for having great weather resistance, flexibility and being ecologically safe making them ideal for green roofs and other buried applications.

They are also useful in the refurb of failing  felt and bitumen roofs.

TPO Membranes

TPO are thermoplastic materials known for their strength and resistance to chemicals and UV radiation and are commonly used for large roofs with PV & solar panels due to its light reflecting properties.

A roll of EPDM membrane
A tub of ARBOFLEX cold applied liquid membrane

Cold Applied Liquid Membranes

These are single component liquid membranes for fast and effective installation and made from pure polyurethane which, once cured, forms a seamless finish. The liquid waterproofing membranes are ideal for roofs with a lot of details and to support a green roof or podium deck.

Self Adhesive Roofing System

This type of flat roof membrane has an adhesive backing which allows it to be directly applied on top of a primer without any need for further adhesives.

A tub of ARBOFLEX cold applied liquid membrane

Applications of Flat Roof Membranes

Flat roof membranes are used in various applications to provide waterproofing and protection. Some common applications include:

Commercial Buildings: Flat roof membranes are widely used in commercial buildings such as offices, retail stores, warehouses, and manufacturing facilities providing reliable waterproofing to protect the building and its contents.

Residential Buildings: A flat roof waterproofing membrane can be used in multi house apartments and blocks of flats with flat roofs, balconies and external communal areas to prevent water damage to the building structures and interior spaces.

Industrial Facilities: Flat roof membranes are commonly used in industrial facilities including factories, processing plants, and distribution centres. They offer durable waterproofing to withstand harsh environmental conditions and protect equipment and inventory.

Schools & Hospitals: Schools, hospitals, and government buildings often have flat roofs which, along with other institutional facilities, need waterproofing. A flat roof membrane provides long lasting protection for these structures ensuring a safe and comfy environment for occupants.

Roof Gardens and Green Roofs: Flat roof membranes are integral components of roof garden and green roof systems as they provide a waterproof barrier which protects the building from water infiltration. It also allows for the installation of vegetation and landscaping on the roof surface.

Roof Decks and Patios: A flat roof waterproofing membrane can waterproof roof decks, balconies, terraces, and patios. They create usable outdoor living spaces as well as preventing water damage to the building structure and protect the underlying materials.

For any specific requirements, or to get technical advice, contact our technical team.

Benefits of Waterproofing Membranes

Waterproofing membranes offer several benefits for buildings and infrastructure:

  1. Protection Against Water Damage: Waterproofing membranes protect against water damage by stopping water from getting into the structure. This protection extends the building's life and reduces the risk of water damage, like rot, mould, and deterioration of materials.

  2. Prevention of Structural Damage: Water infiltration can cause serious damage and harms the building over time, compromising its integrity. Waterproofing membranes help keep the structural integrity by keeping water out of critical areas like foundations, walls, and roofs.

  3. Increased Lifespan of Building Materials: Waterproofing membranes help preserve the condition of building materials, extending their lifespan and reducing the need for costly repairs or replacements.

  4. Improved Indoor Air Quality: Waterproofing membranes can prevent moisture which can lead to mould and mildew growth. By maintaining dry conditions, waterproofing membranes help to improve indoor air quality and occupant health.

  5. Energy Efficiency: Waterproofing membranes can also cut energy use. They stop air and moisture leaks that can reduce insulation's effectiveness which helps to maintain consistent indoor temperatures and reduce heating and cooling costs.

  6. Protection Against Chemicals and Corrosion: Some membranes resist chemicals and corrosion as they are good for use where exposure to harsh chemicals or corrosive substances are a concern such as industrial facilities or parking garages.

  7. Versatility and Adaptability: Waterproofing membranes come in many forms including sheets, liquids, and sprays. They can be applied to many surfaces, like roofs, walls, basements, and foundations. This versatility allows them to be used in many construction jobs.


Overall, waterproofing membranes are essential components of building envelope systems, providing crucial protection against water damage and ensuring the long-term durability and performance of structures.

Support For All Stages of Your Project

Whether it's a new build or renovation, our commitment to good service means that we are always there to provide you with technical advice and assistance.

From the initial consultation to on-site visits and inspections and even after the completion of your project, we are here for you. Contact us here for support today.