Flat roofs are horizontal or almost horizontal, with slight inclinations for enabling water runoff. Continuous membrane, which ensures highest protection from external elements, is one of the most common methods for flat roof application. Other examples of flat roof materials from Roof Trader are available. In modern architecture, a flat roof is primarily seen as a living space, which is pretty much on the lines of a rooftop terrace. In today’s times, these rooftops are taken advantage of by green roofs for planting purposes.
BUR or Built Up Roofing
BUR is one of the most common and popular materials used for flat roof application. The BUR system is comprised of reinforcing materials and alternating asphalt layers that are generally mineral-surfaced or fibre sheets. The asphalt goes through a heating process and it is applied hot, and is mopped over the entire surface of the roof to form a continuous membrane. As gravel is the surfacing material, the waterproofing activity of the layers underneath becomes a continuous process.
A common thermoset membrane, EPDM sets permanently once it gets heated. EPDM or Ethylene Propylene Diene Monomer is a roofing membrane made of synthetic rubber. According to most roofing companies, EPDM is fairly easy to install, very energy-efficient, least expensive, and is environmentally-friendly as well. This is a very durable material and can last for 20-25 years. It tackles harsh weather pretty well and is the most commonly used material for preventing roof leaks. EPDM can be applied only through water-based adhesives.
The thermoplastic single-ply membrane can be cooled and heated repeatedly for repositioning and maintenance. Also known as thermoplastic olefin, TPO is very flexible and flame-retardant. It absorbs the UV rays quite effectively and is made of polyester and polypropylene. These PVC sheets are available in many colours, and they can adapt to different roofs by complying with the shape requirements.
Metal roofing is flat and pretty expensive. However, the increased price is for the protection it offers to the home from external elements or internal accidents like fires. These metal roofs could be constructed of tin or copper, and interlocking panels are used to solder them together to form a continuous membrane. They are flame-retardant and high on aesthetic appeal as well.