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Single-Ply Flat Roofing: Installation and Lifespan

Single-ply flat roofing is a versatile and efficient roofing system. Here are some key points about its installation:

Material Types: Single-ply roofing materials fall into two main categories:
Thermoplastics: These include materials like EPDM rubber, TPO (Thermoplastic Olefin), and PVC (Polyvinyl Chloride).
Synthetic Rubber: This category mainly consists of EPDM (Ethylene Propylene Diene Monomer).
Single Layer: Unlike traditional multi-layered roofs, single-ply roofing is installed in one complete layer. This makes it more flexible and easier to maintain.
Material Sheets: Single-ply roofing comprises flexible sheets of synthetic polymer. These sheets can be either entirely homogeneous or include a reinforcement layer.
The lifespan of a flat roof can vary significantly based on the type of material used. 

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Torch On Felt roofs

They are a great choice for flat roofs. They have a reputation for being leaky, expensive to repair, and short-lived in the past. This is due to the old-fashioned ‘pour and roll’ system, which has been giving flat roofs a bad name ever since. However, design and material improvements mean that Torch On Felt roofs are now a much better option, and can last up to twenty years. Modern systems are applied in 3 layers, consisting of a vapour control sheet, reinforced felt (2mm), and a ‘cap sheet’ (4mm). The cap sheet comes in a range of colours and can either provide a reflective paint finish or a more traditional micro mineral fleck finish. These flecks help to break up the sunlight as it falls on the surface, to stop the bitumen melting

Installation of Torch On Felt roofs

Is done by melting each sheet of felt onto the roof surface and to itself in the places where sheets overlap. This is done with a heavy-duty blowtorch, which the roofer directs at the areas to be sealed together. It is important to use a professional roofing company with a good track record and testimonials. You could be liable if an unprofessional roofer fits your roof and is not licensed to use hot flame equipment


A Torch On Felt roof is reliably durable for 10 years minimum. With good care and regular maintenance, it could last up to 30 years. There are measures you can take to ensure that the roof is not damaged. For example, never let anyone walk on a flat roof or allow window cleaners or builders to put a ladder on them. In hot weather, this can lead to damage to the mineral or paint surface, which leads in turn to UV damage. UV damage will degrade the felt and cause it to become brittle and crack. Anything you can do to prevent physical damage to your roof will increase its longevity.

Inspect For Repairs

When you have had your Torch On Felt roof for a few years, it is sensible to begin inspecting for damage annually, preferably in spring

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