Director of the social housing association Foyer Anderlechtois, Mr Bruno Lahousse, outlines the challenges and solutions for affordable and healthy renovation of the existing building stock.

1. Bruno LAHOUSSE
GENERAL MANAGER
Foyer Anderlechtois
Systemic social housing renovations
Some examples from Brussels

2. RenovActive
THE FOYER ANDERLECHTOIS
- Real estate company (1907), >100 employees
- Public service - Non profit organization
- Actually owns over 3.860 dwellings => 4.500 dwellings in 2023
- Rents social accommodations to low-incomes families
- 3.200 families/candidates tenants on the waiting list
- Average waiting time : 8 years
- Average annual budget for investments & renovations : 10M euros

3. RenovActive
400 Houses ; 30% in poor conditions
5x inhabitants/house
2 bedrooms and no bathroom
90 m² living space
Humidity: Condensation/Groundwater
Small windows
(Past) asset value : 100.000€
(Past) rent : 400€/month
FROM CURRENT SITUATION TO PROTOTYPE
& REPRODUCTION LARGE SCALE LAB - VALUES

4. RenovActive
COMFORT :
Good temperature in winter
Good temperature in summer also
VENTILATION:
Reduce/Avoid smells
Reduce/Avoid also and especially CO2 & VOC
NATURAL LIGHT:
View outside
Daylight
Enough light but also good uniformity
FROM CURRENT SITUATION TO PROTOTYPE - PRINCIPLES

5. RenovActive
THE PROTOTYPE & THE REPRODUCTION LAB : SITUATION
Prototype :
1 house – Bon Air
Renovation :
Bon Air + La Roue
86 houses

6. RenovActive
PROTOTYPE FOR RENOVATION : RENOVACTIVE
Three façades house dating back to the 1920s
Floor area (ground + loft): from 90m² to 120 m²
Natural air supply + mechanical air extraction
Natural light
More than a renovation
A systemic improvement of the indoor comfortOctober 2015 - May 2016

7. RenovActive
THE REPRODUCTION LARGE SCALE LAB : BON AIR
225 houses
40 houses to be
renovated

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SCALING UP – REPRODUCTION LAB PROJECT
Extension upwards into the loft +
Ext. on the ground flour : 64 houses => 120m²
Ext. on two levels : 8 houses => 135m²
Ext. on three levels : 6 houses => 150m²
3x Bedrooms
1x Bathroom
Asset value increased by 300%
February 2017- March 2019

9. 925/02/2018 Velux Group Presentation
2017 2019
Extension on three levels : 6 houses

10. RenovActive
FROM PROTOTYPE TO LAB – SAME NEEDS
What we want => What we need
Use night cooling  Move the staircase
More daylight  Wider windows
More space  use the attic / floor extensions
Thermal comfort  Improved envelope

11. RenovActive
EXAMPLE OF DAYLIGHT ANALYSIS
VELUX Daylight Visualizer

12. EXAMPLE : USE OF VENTILATION TO COOL THE BUILDING
IN SUMMER

13. Next step : Innoviris – Retrofit Living Labs
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In partnership with:
Region of Brussels
Belgian Building and Research Institute (BBRI)
Local Organization of inhabitants (La Régie de
Quartiers d’ Anderlecht Asbl)
VELUX
Free University of Brussels (Vrije Universiteit
Brussel)
2018-2020

14. RenovActive
The mission of the Foyer Anderlechtois
« Work as a social elevator for social housing beneficiaries »
CONCLUSION : From technical values to social benefits

15. RenovActive
PROJECT VALUE : SOCIAL BENEFITS
Better living conditions for +/- 400 persons
Better air quality
Better hygiene
Less noise
Less stress
Consistent & affordable : Same social rent (€/m²)

16. RenovActive