Interlocking extruded polystyrene panels are available with a decorative cementitious surfacing to provide an inverted roof which is lightweight and will need additional loading. The interlock ensures safety against wind forces within limits prescribed by the manufacturers. A special grade of panel is available with a reinforced decorative cementitious surfacing for pedestrian terrace decks.
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Composite boards consist of insulation products which individually are suitable for roofing. The long term bond strength between the materials should be at least as strong as the de-lamination strength of the weakest individual component. The composite board should be free from warping, bowing and be dimensionally stable both during application and in service.
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Is a well established and proven insulation material formed from pure granulated cork, compressed, steam baked and held together by the natural cork gum. It is widely used as a heat resistant and stable facing to rigid urethane insulation to form a composite insulation, is resistant to moisture and decay and is suitable for use above high humidity conditions.
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The tapered roof system is installed on flat roof decks and is designed to provide a positive slope to facilitate roof drainage avoid ponding. We offer survey, design, fabrication and supply of tapered roof insulation schemes which provide tailored and bespoke solutions to flat roofs whilst taking into consideration current regulations and cost/ budget criteria. Available in Rigid Polyurethane and Polyisocyranate, Extruded Polystyrene XPS, Expanded Polystyrene EPS, Cork and Cork Composites, Rock-Mineral Fibre, Foamglass.
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Expanded polystyrene boards are formed by a steam heated process which expands the beads of polystyrene and fuses them into a slab. Boards are available in various grades and are available with a pre-felted upper surface factory bonded fibreboard or Perlite board for use in roofing applications which has the dual function of shielding the expanded polystyrene from hot bitumen and asphalt and absorbing the thermal movement sufficiently to permit a fully bonded built-up roofing system.
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Extruded polystyrene boards have similar thermal movement and heat sensitivity characteristics to expanded polystyrene but have an improved thermal conductivity, low water absorption, high compressive strength, is flame-retardant, reduces thermal stress and saves heating and cooling energy. When selecting a thickness to achieve a specific U-value for an inverted roof, it is necessary to allow for the loss in efficiency due to the cooling effect caused by water draining through the insulation.
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Cellular glass is made from pure glass, expanded during manufacture and formed into slabs which are inorganic, resistant to attack by birds and vermin, almost impermeable to water, will not gain moisture by vapour diffusion, will not rot or decay and is non-combustible. It can be laid without a vapour barrier, provided that the joints are sealed in bitumen according to the manufacturer’s instructions.
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Thermo-Hemp® is a high-quality product distinguished by its excellent technical qualities according to the effectivenorms. The European Technical Approval was issued by the German Institute for Constructional Engineering in Berlin under the registration number ETA-05/0037. The subject “healthy living” is becoming more and more important. Many people do not feel well and have allergies – caused by materials used in their own house.
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Mineral wool is manufactured from volcanic rock, melted at extremely high temperatures. The molten rock is then directed onto a series of rotating wheels where it is converted into thin fibres and during the process a resin is added to act as a binding agent. The fibres are gathered together to form a mat, which is then cured and compressed to form a rigid insulation slab which provides a good level of thermal insulation is dimensionally stable substrate has excellent compressive with high laminar strengths and a high resistance to combustion. Various types of facings are factory bonded onto the slabs to one side to control the surface absorption of bitumen allowing it to be used for flat roofing. It is available in flat and cut to falls systems.
A naturally occurring volcanic rock formed when cooling molten magna comes into contact with water and which causes powdered Perlite to expand some 20 times when heated. During manufacture, the Perlite is combined with mineral fibres and binders to produce a roof board that is incombustible, thermally insulating, have a good compressive strength but low laminar strength, are rather brittle, whilst being ecologically friendly and resists decay but the absorption of moisture can cause significant loss of strength chemically neutral and rot proof.
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Phenolic foam is similar in structure to rigid urethane foams, and needs to conform to internationally agreed ODP levels. An extremely small cell size is possible, and leads to an improved λ value. The cell walls tend to be friable, which makes the foam rather vulnerable to damage but formulations are rapidly improving. The advantage of phenolic foam is a greater resistance to high temperature than other foams, and the possibility of improved performance in a fire. In other respects phenolic foam is similar to rigid urethane.
Environmentally friendly polyurethane boards (PUR) and (PIR) boards are foamed with an inert gas or blowing agent that is locked into the cells and gives the board’s better insulation characteristics than foams which have air filled cells. The blowing agent must conform to internationally agreed levels of ozone depletion potential (ODP) and some blowing agents can only be regarded as transitional until all materials are developed to contain no significant ODP. There is no agreed definition of PUR and PIR formulations, but the term PIR type is used to describe rigid urethane foam with increased resistance to high temperatures, sufficient to withstand the heat of mastic asphalt on application.
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AlumTech is a radiant insulation for application on both flat and pich roofs. It is made of two layers of air bubble polythylene, wedge-welded for a width of 15mm and covered by a film of low emission aluminium on both sides. The materials used to make AlumTech are absolutely safe, non-toxic and non-harmful. Reflective thermal insulation blocks up to 97% of the radiant heat transfer across thin open spaces whatever the humidity, which prevents heat gain in summer and heat loss in winter, in addition aluminium foil creates an effective barrier against moisture and air flow, in addition to being a reflective material and is a permanent way to reduce your energy bills which can be over 30% repaying initial installation costs in no time. It is light, easy to handle and can be laid quickly.
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Has good compressive and laminar strength and a very low coefficient of thermal expansion is used as a low cost heat protection facing for insulation material, is a low cost overlay board for re-roofing and provides a satisfactory base for mastic asphalt waterproofing or fully bonded built-up roofing, but it is vulnerable to decay if it becomes damp and moisture absorption can cause significant movement and may cause ridging of the waterproofing over the joints. It is no longer widely used as insulation because it has insufficient performance for modern requirements.
