Polyurethane Systems for building and industry

The optimum thickness of the polyurethane according to insulation requirements

Knowing the insulation needs of the building is fundamental to improve the energy efficiency of the building and to allow buildings to make a more intelligent use of energy. Therefore, designing the envelope with the optimum thickness of insulation is the best strategy to get the most benefits at the lowest cost.

 

Interior insulation of facade

  • Optimum thickness and insulation: projected polyurethane foam; minimum thickness of layer: 30 mm. Minimum density: 35 kg/m3.

The available space determines and limits the thickness of the insulation applied. The best result is achieved by combining low thermal conductivity and low thickness insulation systems, such as polyurethane with reinforced or direct cladding based on laminated plasterboard as an interior finish.

espesor óptimo del poliuretano fachada interior.jpg

 

Exterior insulation of facade

  • Optimum thickness and insulation: projected polyurethane foam; minimum thickness of layer: 30 mm. Minimum density: 35 kg/m3.

espesor óptimo del poliuretano fachada exterior ventilada.jpg

 

Median facade

  • projected polyurethane foam; minimum thickness of layer: 30 mm. Minimum density: 35 kg/m3.
  • Optimum thickness and insulation of the protective layer: polyurethane elastomer; polyurethane layer of variable thickness (1.5-3 mm), density 1,000 kg/m3 with coloration. It provides UV protection to polyurethane foam and increases waterproofness and consistency.

 

 

Filling of air chambers

  • Optimum thickness and insulation: low density injected polyurethane foam, 12 kg/m3 initial, being able to reach 18 to 25 kg/m3 applied and λ 0.038 W/(m • K) filled with a minimum thickness of 40 mm.

Before its application, it is important to check the continuity of the chamber and the existence of a minimum thickness of filling.

espesor óptimo del poliuretano relleno cámaras aire.jpg

 

Flat cover

  • Optimum thickness and insulation: polyurethane foam; minimum thickness of layer: 30 mm. Minimum applied density: 45 kg/m3 in covers to ensure impermeability.
  • Optimum thickness and insulation of the protective layer: polyurethane elastomer; Polyurethane layer of variable thickness (1.5-3 mm), density 1,000 kg/m3 with coloration. It provides UV protection to the polyurethane foam and increases the impermeability of the cover.

espesor óptimo del poliuretano cubierta plana baldosa.jpg  espesor óptimo del poliuretano cubierta plana grava.jpg

 

Sloped cover

  • Optimum thickness and insulation: polyurethane foam; minimum thickness of layer: 30 mm. Minimum density: 45 kg/m3 in covers to ensure impermeability.
  • Optimum thickness and insulation of the protective layer: polyurethane elastomer; Polyurethane layer of variable thickness (1.5-3 mm), density 1,000 kg/m3 with coloration. It provides UVA protection to the polyurethane foam and increases the impermeability of the cover.

espesor óptimo del poliuretano cubierta inclinada.jpg   espesor óptimo del poliuretano cubierta inclinada forjado.jpg

 

The optimum polyurethane thicknesses can vary according to the geographic area where the building is located, so it will be necessary to check the regulations in this respect in order to use the appropriate values.

 

Sources: Institute for the Diversification and Saving of Energy, IDAE.

 

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