Year of construction: 1964
Construction type: Single building; brickwork, not insulated; some windows have been replaced recently
Number of dwellings: 34
Tenure type: Multiple ownership; a mix of owner occupiers and private renters
Protected status: None
Image © Changeworks
Owners in this case study building had mixed feeling about participating in the LEAF project. While the majority saw the benefits of retrofit, a number of owners were critical of energy efficiency measures given issues with thermal insulation composite systems. Problems with these systems had been reported in the German press.
A complex retrofit was recommended to owners during the project which included the following measures: external wall, cellar ceiling and roof insulation, the replacement of windows and the front door, a new gas condensing boiler and a solar heating system.
The owners have decided to install a new gas condensing boiler (which replaces the old oil boiler). However there are still some details to be worked out, such as how the requirement of the renewable energy law in that state will be fulfilled i.e. whether renewables will be integrated or whether the roof will be insulated.