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Understand

Deciding begins with understanding.

A conseil syndical votes on works that commit the copropriété for ten years. It deserves an explanation, without jargon and without shortcuts. These pages sell nothing: they explain.

Section through a building, showing the heat-loss flows Diagram of a building in section. Arrows show the heat escaping through the roof, the walls, the windows, the ventilation and the lower floors. The intensity of each flow matches the weight of the item: Roof and loft 25 to 30 per cent, Walls 20 to 25 per cent, Air renewal and leakage 20 to 25 per cent, Windows 10 to 15 per cent, Lower floors 7 to 10 per cent. unheated car park 25-30% 20-25% 20-25% 10-15% 7-10%
The intensity of each flow is proportional to the real weight of the item. The roof pulses faster than the lower floors because it loses more.

  • Where the heat escapes

    Roof, walls, air renewal, windows, floors: where the energy of an older building actually goes, and in what order to deal with it.

  • The renovation options

    External or internal wall insulation, ventilation, communal heating: what each option delivers, and what it demands.

  • Damp in older buildings

    Vapour migration, breathability, dew point: why badly designed insulation can damage a building that had stood for a hundred and fifty years.

  • The funding available

    What funding exists for a copropriété, who applies for it, and why the qualification of the engineering practice determines whether it is granted.

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