Roofing Superstore is proud to offer a comprehensive, wide range of flat roofing materials to create the perfect weatherproof and watertight durable flat roof. From GRP roofing and EPDM roofing to more traditional felt roofing, we are confident that you’ll find everything you need for your flat roofing project here. 

If you have any questions about flat roofing materials, or would like some product recommendations, feel free to call our team of roofing experts on 01752 692760, or use the live chat in the bottom right hand corner. 

When to choose a flat roof

Flat roofs are chosen for a wide range of different applications, and the popularity of flat roofs has grown as the variety of different flat roofing methods have increased. 

Flat roofs are much more simple, less costly, and less time consuming than more traditional flat roofs. A flat roof provides a quick and simple covering that protects the building from the ingress of water, moisture, insects and animals. 

Flat roofs are most commonly used for small structures, such as building extensions, garages, garage conversions, outbuildings and more. However, flat roofs are also popular on larger commercial, agricultural or industrial buildings due to their lightweight properties, low cost, and speed of installation.

Flat roof materials

There are a number of different materials available with which to create a flat roof, each of which has its own benefits. 

Fibreglass flat roof kits

Fibreglass flat roofs are popular due to their strength, easy installation and low maintenance characteristics. Also known as GRP flat roofs, fibreglass flat roofs consist of a piece of marine grade, or similar plywood, covered by a resin. Then a fibreglass netting is laid on top, followed by another layer of resin. Once the resin has cured, a top coat is applied to ensure the roof is weatherproof. 

Fibreglass flat roof kits contain everything you need to create a fibreglass flat roof, including exact mix ratios – the fibreglass flat roof kits are available in a range of different sizes depending on the size of the roof you are creating. We’d recommend purchasing a number of fibreglass roof edge trims too, which are installed before the GRP flat roof is laid, in order to create the perfect finish. 

EPDM rubber roofing

Another option for flat roofs is to use EPDM rubber roofing. EPDM flat roofs consist of a single layer of synthetic rubber, which creates a seamless weatherproof covering over a flat roof. The installation process of EPDM roofing is incredibly straightforward, with no specific expensive tools required, unlike torch on felt or bitumen. Additionally, EPDM flat roofs have life expectancies of 50 years or more, and are not damaged easily. A major benefit of EPDM flat roofing is that it can be applied over pre-existing flat roof materials, meaning that damaged older flat roofs, such as felt or bitumen roofs, can be upgraded with a layer of EPDM rubber roofing. 

There are a range of different brands that offer EPDM roofing materials for flat roofs, including Hertalan, Firestone and ClassicBond. To find out how much EPDM you need for your flat roof project, just use our EPDM roof kit calculator, or give our team a call. 

Flat roof felt

Roofing felt is one of the more popular and traditional methods of creating a flat roof. Felt roofing, also known as tar paper, is traditionally installed using hot bitumen to create a secure bond between the roof and the felt. However, it wasn’t particularly long-lasting or durable, so torch-on felt was created. Torch-on felt comes in sheets, and is laid down in layers, using a blow torch to create an adhesive surface on which the next layer can affix to. Felt roofing is popular due to its lightweight properties, as well as its ease of installation and budget-friendly price. Flat roof felt is also a good choice for complex roofs, as it can be cut to size easily, and joined around different fluctuations in the roof. 

As well as torch-on felt, a number of self-adhesive roof felts are available, particularly from IKO. Self-adhesive roof felt is the same as torch on felt, but eliminates the need for any fire from blow torches – instead it is simply a two-layer system that bonds together to form a watertight and weatherproof flat roof. 

Mastic Asphalt flat roof

Mastic asphalt is an incredibly popular material with builders and roofers, as it is incredibly waterproof, making it the perfect flat roof material, as well as being a great choice for flooring. Mastic asphalt creates a smooth and seamless finish, which is durable and long lasting.

Here at Roofing Superstore we offer a wide range of mastic asphalt products, depending on the size roofing job you are undertaking. Choose from modified roofing grade mastic asphalt, gritless paving grade, flooring grade, tanking grade and more. 

Liquid rubber flat roof 

Liquid rubber is a great choice when looking for flat roof materials, particularly for more complex roof shapes. Liquid rubber flat roofs are simply brushed onto the roof surface, creating a seamless waterproof coating that doesn’t require any flames or solvents, and instead is a water-based system. Liquid rubber flat roof membranes have been developed to be puncture resistant, with high tensile strength despite being relatively thin. 

OSB Board

OSB Board, also known as sterling boards, are large boards of strong wood used in many different applications. The two types of OSB sheets available from us are strong, waterproof and versatile construction materials that can be used in DIY or trade projects.

Vapour Control Layers

Reduce heat loss and boost energy efficiency with market-leading vapour control layers, vapour barrier membrane and vapour control barriers. We’re proud to bring you a range of choice from Novia’s excellent dual-use foil tape to Powerlon’s UltraBlock air barrier, and plenty more besides. Want some advice or need to check something?

Need to know more or have some project-specific questions you'd like answered? The flat roof replacement cost per square metre varies largely depending on the flat roof material you choose, but feel free to get in touch and our team will happily guide you through the different options - call on 01752 692760 or use the live chat in the bottom right hand corner.