What Are the Best Flat Roof Materials? Expert Picks!

What are the best flat roof materials: The Best & Worst Options for Your Home

When purchasing flat roof materials, it’s essential to consider the durability and longevity of the roof. Materials like built-up roofing, often designed for reliability and water resistance, have been a traditional choice in the roofing industry. These systems, including hot-mopped options, are resistant to leaks and can offer advantages such as increased value and flexibility for homeowners in the UK. However, there are also disadvantages, like cost and the need for repair or eventual replacement. As a homeowner, educating yourself on the available options can help you make a more informed decision about what will work best for your home. Every material has benefits and disadvantages, so balancing cost, reliability, and flexibility will ultimately guide your choice.

Roofing Felt

Roofing felt is a highly affordable and practical material used for covering buildings and protecting various types of roofs, especially flat roofs, extensions, and garages. It’s a flexible, easy-to-install option, making it popular among first-time homeowners and those on a budget. With a lifespan of around 10 to 20 years, it offers a weatherproof seal that defends against damage from extreme weather conditions. While it’s a simple and cost-effective solution, proper installation ensures long-lasting performance.

Advantages of Felt Roofing

• Affordable and cost-effective option for roofing.
• Quick and simple to install, making it ideal for DIY projects.
• Lightweight, which makes handling and installation easier.
• Weatherproof, offering reliable protection from the elements.
• Suitable for flat roofs, garages, and extensions.
• Great for repairing damaged sections or adding a patch.
• Accessible and commonly available in most hardware stores.
• Provides a long-lasting seal against water damage.

Disadvantages of Felt Roofing

• Short lifespan (around 10 to 15 years).
• Brittle in extreme weather conditions, such as winter.
• Can suffer from warping or disorientation over time.
• Requires frequent maintenance or repairs in harsh environments.
• It is not as high-performance as other roofing materials.
• Unsightly appearance as it ages, significantly when damaged.
• Not suitable for very high-performance or extreme weather situations.
• Potential for damage due to lack of protection in areas with severe weather.

Types of Roofing Felt

A wide variety of roofing felt is available, each suited to different construction needs. Whether you are looking for a reinforced option or a standard felt, there are various types to consider. Some are designed to provide extra protection for flat roofs, while others offer more flexibility and can be used for extensions or garages. Choosing the right type depends on your roof’s structure and budget.

1. Torch-On Felt

Torch-on felt is a highly popular roofing option that offers robust protection for your home. Its three-layer system ensures a weatherproof surface and security against the elements. This method uses a blowtorch to melt the Felt, forming an unbreakable bond with the existing roof. It provides a solid defense against adverse weather and is often preferred for its durability and reliability.

2. Shed Felt

SheFeltlt iFeltsigned for smaller structures like sheds, outbuildings, and playhouses. Made of reinforced bitumen, this weather-resistant material is both durable and easy to install. It’s available in different colors and styles, allowing for customization based on your shed’s aesthetic needs. Typically, shed felt is lightweight and affordable, offering excellent protection for structures that don’t require the same level of security as a main roof. It’s a fantastic option for those who need simple yet effective protection.

3. Flat Roof Trims

Flat roof trims are essential to your roof. They protect the edge and secure the membrane, helping prevent damage, water exposure, and longevity. Flat roof trims are available in various materials and styles and are designed to complement different roofing systems. Securing the edges of your roof provides an additional layer of protection and seal, preventing water leakage and potential damage to your roof structure.

EPDM Roofing

EPDM roofing is a flexible, affordable option for various types of roofs, including garages, workshops, and commercial buildings in the UK. Made from a synthetic rubber compound, it is impermeable to water and offers superior protection against extreme weather conditions, making it ideal for flat roofs and extensions. One of its most attractive qualities is its maintenance-free nature, requiring minimal upkeep for up to 50 years, and it is available in black, gray, and even white for aesthetic preferences. The installation process is typically straightforward, and the material is known for its energy-efficient properties, reflecting heat and reducing energy costs. Overall, EPDM is a modern, cost-effective, and reliable roofing solution that stands the test of time.

Advantages of EPDM Roofing:

• Affordable and cost-effective option for various roofing needs.
• Flexible and seamless, ensuring long-lasting protection.
• Minimal maintenance is required, making it easy to maintain.
• Long lifespan (up to 50 years), offering excellent value over time.
• Resistant to extreme temperatures and UV rays, ensuring durability.
• Energy-efficient, reflecting heat to reduce energy costs.
• Suitable for various structures like garages, workshops, and commercial buildings.
• Offers superior protection from weather elements like rain, wind, and snow.
• Great for extensions, flat roofs, and other projects requiring reliable roofing.

Disadvantages of EPDM Roofing:

• Aesthetics may not appeal to everyone, as it can look basic or industrial.
• Susceptible to damage from falling branches or debris.
• Can suffer from wear, tearing, or shrinkage over time.
• Rubber material may not be as durable in some extreme weather conditions.
• Repairs may be necessary if tears or cracks occur.
• The membrane can be vulnerable to puncture in high-traffic areas.
• Appearance may degrade over time, requiring re-coating or replacement.

Types of EPDM Roofing Material

Several types of EPDM roofing materials are designed for specific applications and conditions. Single-ply membranes are the most common, offering easy installation and a seamless solution for flat roofs. These membranes are typically UV-resistant and can withstand extreme temperatures, making them suitable for re-roofing projects or new installations. They also have the added benefit of being highly resistant to aging, ensuring they maintain their integrity over time. BBA-approved membranes are available and provide further reliability for long-term use in residential and commercial settings.

Outlets

Outlets are critical in installing EPDM roofing to ensure water is efficiently directed away from the roof. Flashings, trim, and seals are essential for securing the membrane and ensuring no water leaks into the structure. Bonding the membrane properly with the right adhesive is key to achieving a strong, durable seal. Primers and solvent-based adhesives secure the membranes to surfaces such as timber, vertical slopes, and pipe areas. Proper surface preparation before application ensures a lasting, practical finish for EPDM roofing.

GRP Roofing

GRP roofing is a highly durable and affordable option for residential and commercial buildings. Made from reinforced plastic, it provides a waterproof solution that can withstand harsh weather conditions for decades. One of its key advantages is its low-maintenance nature—once installed, GRP roofing requires very little upkeep. The material is also highly resistant to UV radiation and water, making it ideal for flat roofs and decks. Installation is fast and easy and can be used for new projects or as a solution for existing roofs. GRP is an excellent choice for anyone looking for a cost-effective, long-lasting roofing material that’s both affordable and reliable.

Advantages of GRP Roofing:

• Cost-effective and provides waterproof protection.
• Easy to install, especially on flat roofs and decks.
• Provides a sleek, modern finish compared to traditional tile or slate options.
• Highly resistant to weather conditions like rain, hailstorms, and UV radiation.
• It can last for several decades without significant damage.
• Requires little maintenance over the years.
• Quick installation, saving on labor costs, and offering a fast turnaround for roofing projects.

Disadvantages of GRP Roofing:

• Discoloration may occur over time, especially in areas exposed to constant sunlight or inclement weather.
• Fiberglass material can lose its sleek appearance and become mildly dull.
• Susceptible to damage from harsh conditions like hail storms or extreme rain.
• It may not be suitable for environments with high exposure to extreme weather.
• The finish may initially gleam but lose its shine with age.
• Noise may be more pronounced during heavy rain or storms than other materials.

Types of GRP Roofing

Several types of GRP roofing materials are available, each offering various levels of performance and application. JJ Roofing Supplies, Cromar Pro, and Cover It are some popular brands that stock GRP materials, providing waterproofing solutions for different projects. Cure It and Flexitec are reputable brands known for their high-quality GRP roofing trims and materials, ideal for residential and commercial roofing needs. These materials are perfect for deck and flat roofs, offering a reliable, long-lasting solution to any roofing project.

Coping Stones

Coping stones are crucial for protecting the tops of walls, especially in flat roofs, detached buildings, or free-standing structures. Companies like Castle Composites Ltd and JJ Roofing Supplies are renowned for producing high-quality handmade products that prevent rainwater from seeping into the wall or roof structure. These stones are crafted to withstand the elements and provide aesthetic and functional value to your project. Coping stones come in various materials, including gravel-infused designs, ensuring they complement your building’s style while providing long-term protection.

Advantages of Coping Stones:

• Durable and able to prevent water from damaging walls.
• Long-lasting and resistant to harsh climates, including colder environments prone to frost.
• Provides top-tier protection from the elements, ensuring that rainwater does not seep into your roof or building.
• Enhances your home’s or promenade’s aesthetics with a clean, appealing finish.
• Elevates the overall look of your property while being cost-effective in the long run.

Disadvantages of Coping Stones:

• Installation can be complicated due to their heavy weight and the need for additional support.
• Requires periodic maintenance, such as cleaning or resealing, to prevent staining and damage.
• Purchasing good quality stones can be expensive, increasing the overall project cost.
• Some materials may require periodic resealing to maintain long-term durability and protection.

Green Roofs

Green roofs are an alternative roofing solution that involves covering a roof with vegetation, such as flowers and plants, to improve the building’s environment and benefit its occupants. These roofs add aesthetic value to a building and help reduce temperature by absorbing rainwater and acting as natural insulators. The material used in green roofs is designed to support the growth of plants, with specialized trays containing soil that provides the necessary nutrients. Over the years, these roofs can enhance durability by protecting the roof surface from harsh weather while reducing the need for repairs or replacement. When properly designed, a green roof can also help purify the air and contribute to longevity, making it an environmentally friendly and practical choice for flat roofs, balconies, or building projects.

Advantages of Green Roofs:

• Improves the strength of a building’s structure by reducing weight stress on the roof.
• Acts as a natural insulator, helping to reduce energy costs and creating a more comfortable environment for the inhabitants.
• Absorbs rainwater, helping to prevent water damage to the roof and the building itself.
• Contributes to the longevity and life expectancy of the building’s roof.
• Plants on the roof act as filters, purifying the air and providing a natural solution for pollution.
• Adds a unique aesthetic to the building with vegetation and offers a space for relaxation or growing turf.

Disadvantages of Green Roofs:

• Installation requires complexity and specialized knowledge to handle the added weight of soil and vegetation.
• High cost of installation and maintenance, especially for high-quality and long-lasting materials.
• Over time, the roof may require repair or replacement.
• The growth of plants can be unpredictable, especially in harsh weather conditions.
• Requires regular maintenance, including watering and ensuring the plants stay healthy and the soil is replenished.

TPO membrane roofing

Green roofs are a durable and energy-efficient roofing solution, often used on flat or low-slope roofs in residential and commercial buildings. One key feature of green roofs is their ability to help with energy efficiency by providing natural insulation, which can reduce the reliance on air conditioning (AC) systems. TPO, EPDM, and PVC are standard membranes used in green roofing systems. These membranes are designed to be reflective, helping to reduce heat absorption and glare from the sun and keeping the building cooler. Over the years, these roofs can help reduce heat buildup inside the building while protecting the roof from hail, wind, and other forms of damage. Combining a single-ply membrane and vegetation provides structural and environmental benefits to the building.

Advantages of Green Roofs:

• Provides natural insulation, reducing the need for cooling systems and saving on energy costs.
• The reflective nature of the membrane reduces heat absorption from the sun, helping maintain a cooler indoor environment.
• Helps with water management by absorbing rainwater and preventing it from entering the building, avoiding damage.
• Great for reducing glare and enhancing energy efficiency by lowering the overall building temperature.
• The plants on the roof offer a natural aesthetic and contribute to the durability and longevity of the roofing system.

Disadvantages of Green Roofs:

• Installation can be more costly than other roofing materials because specialized materials like TPO and EPDM are required.
• The roof may become dirtier or suffer damage from hail and wind over time.
• Requires regular maintenance to ensure plants thrive and the roof’s membrane remains intact, which can increase costs.
• Certain green roofs may face weight issues due to soil and plant matter, requiring additional structure reinforcement.
• Maintaining the proper balance of plants and roof health may be challenging in areas with extreme sun exposure.

PVC membrane roofing

PVC membrane roofing is a highly durable, long-lasting roofing solution lasting up to 30 to 50 years. These membranes are ideal for flat roofs and low-slope buildings, whether residential or commercial. The PVC material is water- and ire-resistant, offering excellent puncture resistance, making it suitable for withstanding weather extremes such as extreme cold or intense heat. These membranes are installed with heat-welded seams, ensuring a watertight surface that can handle various environmental stresses. The flexible nature of PVC allows it to expand and contract without damaging the roof structure, making it a reliable option for roofing needs. Additionally, the reflective white color of the membrane helps maintain energy efficiency, reducing the need for air-conditioning by reflecting the sun’s warmth and offering a low-maintenance solution for building owners.

Standing seam metal roof

Standing seam metal roofs are a durable and long-lasting roofing option that can endure for 30 to 50 years with proper installation. These roofs feature panels with mechanically locked interlocking seams to prevent water from entering, making them ideal for flat or low-slope roofs. The design allows for thermal expansion and contraction, ensuring the roof can handle changing weather conditions without damage. Standing seam roofs are also known for their aesthetic appeal, with options in various colors and finishes to match different styles. While they can be more expensive upfront than other roofing options, their longevity and low maintenance needs make them a cost-effective investment in the long run. The system provides excellent ventilation for spaces like attics, making it a great choice for homes or commercial buildings.

How much will your new flat roof cost?

The cost of a new flat roof depends on various factors, including the size of the roof, the material used, and any specific penetrations or structural needs. For example, metal roofs typically range from $12.00 to $17.00 per square foot, depending on the gauge and fabric of the material. If you’re considering a standing seam roof, the price can go up to $15.00 per square foot for a more durable membrane system. The insulation and replacement options also play a role in the overall price. The general installation cost will be influenced by the contractor you hire and any additional work needed for gluing or sealing. A thicker membrane or a more extensive roof could increase costs further, but it ensures long-lasting durability for your home or building.

Conclusion: What Are the Best Flat Roof Materials?

When selecting the best flat roof materials, it’s essential to consider the product’s durability, longevity, and efficiency. Options like GRP, PVC, and EPDM are popular for their waterproofing capabilities and protection against harsh weather elements. Green Roofs and fiberglass materials can offer decorativeness and insulation benefits for a more aesthetic appeal. Additionally, bitumen and modified membranes protect residential and commercial buildings. Coping stones and other components can also enhance the overall structure and extend the life of your roof. Each material has its advantages and drawbacks, so getting a detailed quote from a dedicated roofing contractor can help you decide which material best suits your needs and budget for the long term.