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Brick building in Austria
Planning: Sabine Greifeneder-Viehböck (overall renovation of old structure and energy supply)
On renovation of the 100-year-old solid brick structure, the goal was to significantly improve energy efficiency and the utilization options for the residents. In addition to the renovation, a 140 m² addition was created for shared office space in the house.
The original house was built directly into the clay, with a bitumen layer keeping the masonry dry. In the course of renovation, the 50 cm thick walls were augmented with 14 cm insulation panels. Due to the doubling of the roof rafters already necessitated by the renovation, it was possible to blow in 24 cm of cellulose insulation.
The old oil heating was removed. Water heating and a large part of the heating for 280 m² of living space and the adjacent health service offices is handled by the 26 m² solar system, complemented by a district heating and a wood stove in the residential area. Walls and floors were equipped with warm water lines for radiant heating at low temperature.
The renovation measures yielded a significant reduction in energy costs.
| Project | 100-year-old brick building |
| Size | 280 m2 of living space, office space (incl. new addition of 140 m2): 280 m2 |
| Heating system | Low-temperature heating system fed by a solar system (26 m2) and district heating system; wood stove in residential area |
| Wall insulation (14 cm insulation panels) |
| Roof insulation (24 cm cellulose insulation between rafters) |
| Renovation of heating system (low-temperature heating with solar system and district heating with supplementary wood stove) |
| Original consumption kWh/m2a | ca. 130 |
| Post-renovation consumption kWh/m2a | 45 |
| Annual CO2 savings | 4.2 tons |
Insulation significantly reduces heating costs, even in old structures.