Which Materials Work Best for a Flat Roof?

When beginning work that needs a flat roof, it is vital to choose a roofing material that will suit the project. Here is our guide to the different materials available.

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Felt Flat Roofing

Felt is the traditional material for flat roofs, and it has been improved and developed over the years. Typically available in sheets and affixed by a blow torch, the roofing consists of three layers: reinforced felt, vapour control and cap sheet.

Felt roofing is a cost-effective option. You can choose the colour of the top layer, which is relatively easy to repair using a patch and torch. It lasts approximately 10 years.

Built Up Roofing

Built up roofing (BUR) is one of the oldest and most common materials for flat roofs. It consists of molten gravel and tar that form several layers, creating a waterproof seal and preventing leakage.

This roofing is environmentally friendly, as asphalt is a byproduct of diesel, heating oil and petrol.

Applying BUR is an intensive process as numerous layers must be formed, and it can also require an additional supporting structure due to the material’s weight.

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EPDM Flat Roofing

Like neoprene and PVC, Ethylene Propylene Diene Monomer (EPDM) is a variation of rubber roofing. Thanks to its water-resistant properties, it is used for tubing, pond liners and seals.

EPDM is ideal for a low sloping roof. It can be installed in one whole sheet, removing the requirement for waterproofed seams, and it lasts around 30 to 50 years.

For roofers Cheltenham, contact a company such as hempstedroofing.com.

Liquid Flat Roofing

Liquid roofing is growing as an alternative method that is suitable for complex structures. Liquid coating is directly applied to the roof deck, where the coating spreads and creates a seamless cover.

It’s a more expensive material, but labour and time costs are reduced due to its less labour-intensive process. It is also waterproof, weather-resistant and durable, with a lifespan of at least 25 years.

GRP Fibreglass Flat Roofing

Glass Reinforced Plastic (GRP) is composed of glass strands, which combine to create fibreglass layers. It has a lifespan of 20 to 30 years.

Although more expensive, the material is laid in one or two simple layers that are strong and light. It boasts a smooth, attractive finish that is also simple to repair. It is ideal for small roofs.