Advantages of sprayed polyurethane foam

Sprayed polyurethane ​foam is an insulating material obtained by mixing two components (polyol and isocyanate). It is sprayed onto the surface to be insulated (substrate), to which it self-adhesives. When installed there is a huge improvement not only in the energy efficiency of buildings, but it also provides acoustic insulation.

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How is it sprayed and what thicknesses are recommended?

Sprayed polyurethane is a versatile, resistant, durable and, for all these reasons, very profitable material. In addition, it achieves the highest thermal performance with little thickness, thanks to its​ low thermal conductivity. A correct spraying method is key to maximum performance. To achieve this, it is essential that professional people intervene, who know what the ideal conditions are for spraying, as well as doing so with the right equipment. The thickness of the sprayed layer can be controlled by varying the application speed. The fewer layers, the greater the performance, which is why it is a very cost-effective material that improves the performance of other insulating materials with a similar thickness.

CTA - MOFU01 Polyurethane building applications

Insulation needs are the key factor in deciding what thickness to apply, as well as the geographical area where the building is located. The Technical Building Code (CTE)​sets out the most appropriate values.

In the​insulation of a facade on the inside, which is limited by the available space, a minimum layer of 30 mm is recommended, with a density of at least 35 kg/m3. The same measures are recommended for the insulation of a

facade on the outside​with sprayed polyurethane foam, and also in the dividing facades, although to the latter it is recommended to apply a protective layer of polyurethane elastomer of between 1.5 and 3 mm, with a density of 1,000 kg/m3, to improve waterproofing and consistency while achieving UV protection. This also applies to flat and sloping roofs, which will also be guaranteed waterproofing with the sprayed polyurethane foam.

 

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Advantages and disadvantages of sprayed polyurethane foam

With this insulation system, a waterproof membrane is achieved, which seals gaps and joints, thus eliminating infiltrations. It is an optimal way to guarantee the water-tightness of the buildings, thus favouring their thermo-acoustic insulation even with the highest demands, as is the case of sustainable construction. The foam of the sprayed polyurethane becomes, therefore, an essential material for the efficiency and sustainability of the buildings.

Sprayed polyurethane allows effective treatment of thermal bridges, and when it is installed, it adapts to any geometry or irregularity of the substrate. Furthermore, as it requires a minimum thickness to fulfil its function, it hardly reduces the living space inside.

Furthermore, its application is simple, since it requires almost no work or the use of adhesives or fastening systems. As the material is manufactured on-site, there are savings in both transport and storage, and no waste is generated. Thus, sprayed polyurethane is an efficient, cost-effective and sustainable insulation system, since its durability can exceed that of the construction element of which it is a part.

CTA - MOFU01 Polyurethane building applications

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Technical Data Sheet Poliuretan Spray S-35RGB/ECO