Thermal insulation of the underside of the slab above the basement

People living in ground-floor flats of apartment blocks with unheated basements — which is usually the case — often complain about cold floors.

Because the slab above an unheated basement is often not insulated, it is no surprise that its upper surface is cold. This leads to large energy losses and not rarely to mould. The problem is easily solved by insulating the slab above the basement from below.

For reinforced concrete slabs we recommend bonding and then dowelling our Austrotherm EPS A100 to the underside. The thickness depends on the height of the basement and of the lintels above the basement doors and windows. We recommend at least 12 cm — a thicker layer will of course insulate even better.

You cannot go wrong with an even harder grade of our EPS either (Austrotherm EPS A120 or Austrotherm EPS A150): since these boards have slightly better (lower) thermal conductivity than Austrotherm EPS A100, boards a couple of centimetres thinner than 12 cm give the same insulating effect.

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