Commercial Flat Roofing Systems

A commercial flat roofing system or industrial flat roof system, is a level or nearly level roof typically used on large commercial buildings and industrial premises, designed for easy maintenance, energy efficiency, and maximising the use of space. These types of commercial roofing systems and flat roof systems are popular choices due to their durability and cost-effectiveness for a wide range of roof systems.

Commercial flat roofing systems primarily include single-ply membranes, built-up roofing, modified bitumen, and liquid-applied systems.

Commercial flat roof systems protect from the elements through durable, waterproof materials and effective drainage systems that prevent leaks and withstand harsh weather conditions.In commercial flat roof systems, weatherproofing, reinforcement, and surfacing are critical for durability and protection:

Weatherproofing

This involves applying materials like waterproof membranes and sealants to prevent water infiltration and protect the building from rain, snow, and other moisture-related damage. Preparation of the roof surface is crucial; it must be clean, dry, and free of debris before installation of this membrane begins.

Reinforcement

Reinforcement includes the use of additional materials such as fabrics, meshes, or extra layers to enhance the roof’s structural integrity and resistance to physical stresses, extending its lifespan.

Surfacing

Surfacing involves adding a protective top layer to the roof surface, such as gravel, reflective coatings, or tiles, to shield the roof from UV radiation, mechanical damage, and extreme temperatures, while also improving energy efficiency. Once again, proper preparation of the roof surface is essential to ensure the effectiveness and longevity of the surfacing layer.

When selecting commercial flat roofing systems several key benefits make flat roofs a popular choice:

Durability
Commercial flat roof systems are built to last. High-quality materials such as EPDM and TPO membranes offer exceptional resistance to UV radiation, punctures, tears, and weathering, making them ideal for buildings in regions with extreme weather. Severe damage or degradation of a flat roof may require a new roof, and a licensed roofing contractor should assess the existing commercial flat roof system to determine if repair, refurbishment projects, or replacement is needed.

Cost Effectiveness
Commercial flat roofing is often more economical than pitched roofs, providing a cost-effective solution for covering large surface areas. Flat roofs are generally cheaper to install than pitched roofs due to simpler designs and faster installation. Additionally, the simple design and ease of installation can result in lower labour costs and reduced construction time, with minimal disruption to ongoing business operations. Commercial flat roof systems are also well-suited for refurbishment projects, offering compatibility with existing structures and seamless integration.

Energy Efficiency
Modern flat roofs are designed with energy efficiency in mind. Reflective materials like TPO can reduce cooling costs by reflecting sunlight, keeping the building cooler in the summer months. This can lead to significant savings on energy bills and a reduced carbon footprint.

Versatility
Flat roofs offer versatility in design and functionality. They can support additional features such as solar panels, green roofs, or HVAC systems without requiring additional structural support. This flexibility allows building owners to maximise roof space for various uses.

Low Maintenance
Commercial flat roof systems are easy to maintain because they are easy to access making inspections, cleaning, and repairs much easier to do and ensuring any issues can be addressed promptly to prevent further damage. Regular inspection and maintenance of a roofing system is paramount to its durability.

Energy efficiency is a top priority for building owners and facility managers when it comes to commercial flat roofing. The right flat roofing solutions can have a significant impact on reducing energy costs, improving thermal performance, and supporting sustainable building practices for both industrial buildings and commercial buildings.

Modern commercial flat roofing systems offer a range of options to enhance energy efficiency. Single ply membranes, for example, are engineered to deliver outstanding thermal performance, helping to keep interiors comfortable year-round and lowering energy bills. 

Green roofs, also known as vegetative roofs, provide natural insulation, reduce stormwater runoff, and create additional green space, all while contributing to a building’s overall energy efficiency.

Liquid roofing systems, including cold applied systems, can be formulated for high thermal resistance and seamless waterproofing, further improving energy efficiency and protecting the roof assembly from water ingress and ponding water.

Integrating commercial flat roofing systems with other building systems, such as HVAC systems and rooftop equipment, can create a comprehensive approach to energy management. A well-designed commercial flat roofing system not only supports the performance of these systems but also helps to optimise the overall energy use of the building.

Choosing the right commercial flat roofing solution for your building depends on several factors, including the building’s location, climate, and specific needs. Here are some of the top solutions:

TPO Roofing Systems

SURE-WELD® TPO (Thermoplastic Polyolefin) membranes are another excellent choice for commercial and industrial flat roofs. Known for their high performance, ease of installation, durability, and energy efficiency, TPO roofing systems resist UV radiation, punctures, and tears, making them suitable for buildings exposed to extreme weather conditions.

TPO membranes are also recognised for their reflective properties, which help reduce energy costs by keeping the building cooler. Modern single-ply membranes like TPO feature heat-welded seams that create an effective waterproofing barrier.

EPDM Waterproofing Membranes

EPDM (Ethylene Propylene Diene Monomer) membranes are highly durable, synthetic membranes with a lifespan of 25+ years and are flexible, making them a popular choice for commercial flat roofs. They are resistant to UV radiation, weathering, and punctures, providing reliable protection in harsh climates. EPDM and TPO are easier to maintain and modern single-ply membranes feature heat-welded seams for superior waterproofing.

Our bitumen-backed RESITRIX® membranes offer a robust solution for all weather conditions, while HERTALAN® membranes provide custom-made EPDM sheets tailored to your needs.

• RESITRIX®: Compatible with a variety of substrates, including bitumen, felt, timber, and concrete, making them an excellent choice for refurbishments.

• HERTALAN®: Made-to-measure EPDM sheets are laid on multiple substrates and provide a tailored solution for your roofing needs.
  
  

Liquid Applied Systems

Liquid applied systems, including cold liquid roofing systems, offer a seamless roofing layer with excellent water resistance and high durability. These liquid-applied roofing systems are ideal for roofs with many penetrations and can adapt to complex roof shapes, making them suitable for refurbishments and large flat roofs. Cold liquid roofing systems are also recognised for their role in sustainable roofing options, including green and solar roofs.

Green Roofs

Vegetative roofs, or green roofs, have living plants installed on the flat roof surface that can effectively provide storm water control and enhance sustainability. Green roofs contribute to environmentally conscious roofing solutions.

Installation Process and Maintenance

The installation process for commercial flat roofing systems typically begins with a thorough survey of the existing roof structure. After the membrane is installed, all seams and edges must be properly sealed to ensure watertight integrity. Regular maintenance and inspections are recommended after installation to ensure the longevity and performance of the flat roofing system. The installation process may vary based on the type of roofing system chosen, such as single-ply, built-up, or modified bitumen systems.

At CARLISLE®, we are committed to providing reliable and sustainable solutions for commercial and industrial flat roofs. Starting from your initial consultation as well as support after your project is completed, our team is here to guide you through every step of your roofing project.

We offer expert advice to ensure your roofing project meets the highest standards of performance and durability. Contact us today to learn more about our flat roofing solutions or to speak with our team.