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A critcal area to consider when insulating is under the slab.
Each of the products have their own merits. 
Consult with Solartex if you need further technical advice.
Consider the following:
  • Climate Zone
  • Slab thicknes & Construction
  • Roof surface finishing ( gravel ballast / pavers / waterproof membrane)
  • Condensation control
  • Thermal:   (winter heating or summer cooling requirements)
  • Thermal expansion & contraction (noise)
  • Ceiling space below
  • Plasterboard quality and density (10mm, 13mm, 16mm or multiple layers) and how it is to be fixed to framework
Suitable Products:

  • Kingspan Kooltherm K10 (Closed Cell Foam / Reflective Foil laminate) The Kingspan insulation products provide a comprehensive range  of  thermal solutions for concrete slab application.  Rigid board systems can be fixed to the underside of the slab. Kingspan provide the highest thermal rating per thickness of product. Fixed using specially designed insulation washers of varying lengths to suit board thickness. 
  • Foilboard (Expanded Polystyrene / Reflective Foil Laminate) Available in 10, 15, 20 and 25mm foil finish on both sides. Foilboard can be installed to the underside of slabs to improve themal ratings.
  • Isoboard (Extruded Polystyrene) Available in thickness from 25mm up to 100mm Provide a high thermal rating.  Fixed using specially designed insulation washers of varying lengths to suit board thickness.

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