Case Study: Dole: Rehabilitation Low consumption of 36 housing

Short Description

Condition before the work:

The condition of the building was the following:

Loss of the building "Isolation"
- Need for energy flux: 83 000 or 180 W / m²
- After isolation: 28 000 or 60 W / m²

Heating:
- Requirements state: 166 kilowatts
- After isolation: 57 kW

Ventilation:
- A breakdown in the presence of uncontrolled non-compliant with current regulations. Very uncomfortable especially for renters with external joinery facilities if emphasized the thermal discomfort.

General appearance of homes:
- General deterioration mainly due to poor insulation and poor ventilation;
- Amplified presence of mold in the building;
- The embellishments are faded and a cover of soil is difficult;
- Landing doors to lock single point of thinness does not guarantee a comfortable tone and are not effective enough in terms of air tightness and resistance to fire.

Insecure Gas:
- Unventilated technical gain
- Old doorless taps

Electricity:
- Public installation outdated and not secure.
- Installation in basic unsafe accommodation.
- Very few outlets in each unit that requires the use of multi taken outlets.
- Non-compliance with RT 2005.

What steps have been taken?

Here are the steps energy retrofitting links:
- Change exterior joinery
- Partitions attics and cellars
- Intervention to remove the balcony decks
- Double glazed with Gas
- Millwork: air tightness
- Insulation basement slab high mineral fiber
- Insulation wool slab low attic
- Installation of thermostats and thermostatic canes
- Condensing boilers individual
- Ventilation: HRV collective flow
- Ventilation: Air tightness of dwellings
- Thermostatic valve for showers

Key Elements

Main Results

What level of energy performance has been achieved?

Consumption before the work: 333 WhEP/m2. year

Consumption after work:

Lessons learned

Calculating the return of investment?

Please download HERE the Financial Plan.

Additional Information

How social housing organizations manage the investment risk?

One of these three devices allows social housing organizations to spread the cost of improvements in energy performance between landlords and tenants:

- The rent increase within the rent ceiling?

- Use a third line on the receipt of tenants

- An increase in rent under the conventional social utility.