Case Study: nZEC - New construction of 8 dwellings in Beveren, Maalderij, Belgium
Name of organisation: Gewestelijke Maatschappij voor Huisvesting
Stage of development: in progress
Year of finalization: 2013
Type of project: construction
Area: suburban
Scale: group of buildings
Type of building: Apartment in a block of six to ten stories
Number of units/dwellings: 8
Tenure: social rental
Street: Maalderij
Postcode: 9120
City: Beveren
Region/ County: East Flanders
Country: Belgium
Last Update: 14.04.2015
Short Description
The dwellings consist out of factory made components for timber frame buildings. The rough structure (windproof) was built in only three weeks. Besides the short construction period there was also a focus on energy.
Key Elements
Thermal Insulation
K-value: 30
E-value:
- Dwelling 1 (left): E62
- Dwelling 2-7 (middle): E66
- Dwelling 8 (right): E62
Construction:
- Floor: 0,168 W/m²K
- reinforced concrete: 17,5cm
- Insulation XPS Knauff D350: 2x5cm
- Screed: 4cm
- Floor covering: 1cm
Exterior wall - 0,2 W/m²K:
- Brick: 9,8cm
- Air cavity: 3,5cm
- Kingspan K12 insulation: 4cm
- Gyproc: 1cm
- Hout + URSA 30 insulation: 14cm
- Gyproc: 1cm
Exterior wall - 0,19 W/m²K:
- Wood: 1,8cm
- Air cavity between battens: 3,5cm
- Kingspan K12 insulation: 4cm
- Hout + URSA 30 insulation: 14cm
- Gyproc: 1cm
Roof:
- Bitumen: 0,6cm
- Insulation PUR: 15cm
- OSB: 2,2cm
- Air cavity: 24cm
- Gyproc: 1,25cm
Ventilation
System C+: Natural supply and mechanical exhaust (demand driven).
Heating and Hot Water
Heating:
- Central heating: located within the protected volume
- Type: condensing boiler using natural gas
- Test Efficiency at 30% part load: 108%
- Radiators
Sanitary hot water:
- Instantaneous water heater
Air Tightness
- Air pressure testing (n50)
- Dwelling 1 and 8: v50 = 3,62 m³/h.m²
- Dwelling 2 t till 7: v50 = 4,56 m³/h.m²
- Average n50 value: 2,5/h
Windows and Shading
| Material | U (W/m²K) | Uw (W/m²K) |
|
| ||
Profiles tilt & turn windows | PVC profile | 1,7 | 1,6 - 2 |
Glas | super insulating | 1 | |
| |||
Profiles sliding windows | PVC profile | 1,7 | 1,65 |
Glas | super insulating with g ≤ 0,38 | 1 | |
| |||
Skylights | Velux | 0,72 | 0,72 |
Glas | Velux - g = 0,52 | 1,1 | |
| |||
Door | PVC profile | 1,7 | 1,79 |
Glas | super insulating | 1 |
Certification
EPB-calculation and air pressure testing.
Funding
- Estimated cost: 1.003.436,88€
- Cost by order: 1.396.606,60
- Preliminary cost after revision: 1.406.483,54€
Main Results
Lessons learned
Additional Information
Mr Bernard Wallyn
VMSW - The Flemish Agency for Social Housing
E-mail: bernard.wallyn@vmsw.be
Web: www.vmsw.be