Green roofs are popular due to their huge benefits and natural design possibilities. All in all, a product with numerous benefits and applications. It is a versatile, highly elastic system with strong adhesive qualities, high UV resistance and excellent energy efficiency. Liquid waterproofing is used, not just on roofs, but for basements, terraces, bridges, wet rooms and many more applications and is an excellent solution to use in complex designs and difficult situations. It is quick and easy to apply, seamless, hardwearing and long-lasting and requires little maintenance. It can be applied to a wide range of material bases – from asphalt to steel – and has many advantages. Since it is applied cold, there are no associated risks with hot works, so it can be used in myriad situations. This is a liquid-based coating of polyurethane, which bonds with the substrate to form a waterproof membrane. We applied the felt using the cold method to prevent fire risk, providing a roof which is durable and long-lasting. The school needed a new, felt roof with good energy conservation, in a hardwearing, long-lasting finish. Our work at Newchurch Primary School demonstrates exactly that situation. The cold method is preferable in more lightweight projects, particularly where safety must be prioritised, without the use of gas torches. The hot method ensures a quick, robust solution and the felt is an integral part of the surface. The hot method involves bonding the felt to the surface with a gas torch and the cold method fixes the felt mechanically, or bonds it with hot air and adhesives. There are two construction methods for RBM – hot and cold. They also offer excellent thermal values. Despite their strength, they are flexible enough to expand and contract well. Built up felt systemsīuilt up systems, also called Reinforced Bituminous Membranes (RBM), use felts with very high tensile strengths. This is a good example of the varied use of metal roofs – in this case, giving the safest, most cost-effective solution with enhanced insulation. Metal roofs offer three durable solutions to fit a range of design needs.Īt Sankey Bridge Industrial Estate, where Warrington Borough Council needed to enclose an asbestos roof without disturbing it, we used insulated steel sheeting to overlay and encapsulate it safely. This allows a very hardwearing, long lifespan of up to 25 years. Twin skins are similar but are assembled on site and provide two layers of metal sheets, separated by a metal spacer grid. Prefabricated composite panels of two, bonded metal skins, give a quick, low maintenance solution. Standing seam designs, with raised seams using concealed fasteners, are versatile, flexible and particularly good for curved roofs. Metal roof cladding, sheeting or tiling materials can be designed in tune with surrounding roof designs and there are three types to choose from. They are low pitch and particularly useful in situations where it’s important to have vandal-resistant roof finishes. Metal roofs are lightweight, easy to install and are available in a wide range of finishes and colours. We recently refurbished the roof, installing a strong, durable single ply system with a 20 year guarantee. They can also form the base for green roofs (see type 5), becoming a component of more environmentally friendly roofing systems. They are very versatile and can be used as a foundation for additional design features, such as roof terraces and balconies. Membranes are in a single, flexible sheet so they can cover complex-shaped roofs well and are safer to install because they can be welded with hot air. Single ply is thermally efficient when combined with insulation, offering a flame-free, robust solution which is very resilient in bad weather. They can also mimic other, more expensive materials, such as metal. Single ply membranes, usually synthetic polymers, come in a range of thicknesses, colours and materials that are lightweight, waterproof and durable. Single ply systems are easy to install and long-lasting.
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