ABRACADABRA Technical Toolkit helps assessment of deep energy retrofit projects

The expansion of the deep retrofit market will require the development of commonly agreed, tested and accepted standard process which will increase the chance of successful replication.

In this context, the EU-funded Horizon 2020 project ABRACADABRA (Assistant Buildings’ addition to Retrofit, Adopt, Cure And Develop the Actual Buildings up to zero energy, Activating a market for deep renovation) is based on the prior assumption that a substantial increase in the real estate value of the existing buildings can play a key role in the deep renovation. The project aims at demonstrating to the key stakeholders and financial investors the attractiveness of a new renovation strategy based on volumetric Add-ons and Renewables (AdoRes) intended as one (or a set of) Assistant Building unit(s) – like aside or façade additions, rooftop extensions or even an entire new building construction – that “adopt” the existing buildings to achieve nearly zero energy.

One of the key deliverables of this project is a Technical Toolkit, which provides a guide and outline process for stakeholders to understand, assess and implement the technical assessment required for successful building renovation projects.

The Technical Toolkit consists of two main parts. The first part of this toolkit includes an integrated and simplified energy model (SEM) for energy-economic analysis for non-experts and experts alike. The SEM is specially designed for quick input of data and calculations. It also offers the possibility to insert data regarding extensions of a building without having to re-insert data on the existing building, which is an advantage compared to other similar software. In this way, various extension scenarios can easily be assessed.


Scenarios for ABRACADARBA:
scenario 1:

scenario 2:

scenario 3:

scenario 4:

scenario 5:

scenario 6:

standard retrofit (without any extension);

ground piles;

façade extension;

rooftop extension;

sideward extension;

construction of an ‘assistant building’.

The second part of the Technical Toolkit is the Guideline Catalogue for Technical Solutions. The Catalogue is an information source for building owners, project developers, construction companies, financiers and other involved parties. The Catalogue provides different technical solutions, possibilities, materials their technical properties. This information is provided to help successfully carry out deep renovation projects with volumetric extensions from the technical perspective. The toolkit also provides a preliminary cost calculation for each scenario according to the reference construction market as well as an estimation of the real estate value of the renovated building and AdoRes. In order to calculate the business performance and use cost effective solutions for deep energy renovations with AddOns (volume extensions) and AdoRes (renewable installation), the ABRACADABRA Financial Toolkit can be used.

Together with the Financial and Regulatory Toolkits, the Technical Toolkit provides guidelines for stakeholders in implementing AddOns with energy renovations. As there is little knowledge on how to realise nZEB (nearly Zero Energy Building) buildings, these guidelines will serve as helpful means in the renovation process.