- Listing of energy scores of 20 houses
- Advice on the most effective sustainability measures
- 20 homes from F and G to labels to B and C labels
Making residential portfolio more sustainable
Real estate investor Gal Peled wants to equip provide his entire housing portfolio with green EPCs. But how can the first 20 houses in Mr Peled’s portfolio be transformed from EPCs G and F to energy-efficient houses with EPCs B and C? And how can this be achieved within the set budget with appropriate funding? CFP inventoried the energy scores and then gave advice on how the 20 houses could achieve at least an EPC C.
‘It was particularly interesting to strike a good balance between legislation and making the homes more sustainable with an optimal result for the home portfolio, the tenant and the financier.’ The successful cooperation with CFP and ING Groenbank helped me in a fantastic way. The cooperation with the team and the advice on making my real estate portfolio more sustainable fitted in perfectly with my ambition to make my portfolio green.’
– Gal Peled, Peled Vastgoed
Condition of the homes
CFP visited 20 ground-level single-family houses of Peled in the provinces of Groningen, Friesland, Drenthe and Overijssel. The houses were built in the 1950s or 1960s and have cavity walls, but these are not yet insulated. The houses generally have a sloping roof, some of which with an attic. The floors are not insulated, but they already have an HE boiler for heating and hot water.
The sustainability measures
After investigation on site, there appeared to be quite a number of possibilities to make the houses more sustainable. In the end it was decided to focus on three measures:
- Roof insulation
Roof insulation appeared to have the greatest effect on the EPC of the houses visited. As warm air rises, up to 35% of heat is lost through the roof. An insulating spray will be used to insulate the roof. This is a lot easier and therefore cheaper than, for example, glass wool or PIR insulation panels.
- Cavity wall insulation
The cavity walls of the houses are not yet insulated and a lot of heat is being lost. By applying cavity wall insulation, a great deal of waste can be avoided in the houses of Peled.
- Solar panels
Solar panels have a major effect on electricity consumption and therefore on the EPC. It was therefore decided to apply this measure to the houses of Peled too. All black monocrystalline solar panels have been chosen. These solar panels are slightly more efficient than polycrystalline solar panels and look nice and modern.
Cavity wall insulation is an absolute must-do if you want to make a house more sustainable. It has a great effect on your energy consumption and it is easy and inexpensive to apply. However, you have to be careful, because the cavity must be completely clean. If not, contaminants must first be removed to prevent moisture problems.
– Orin Tijse Klasen, consultant at CFP Green Buildings
There are also a number of measures that are not included in the improvement plan for Peled’s houses:
- Floor insulation
In the case of Peled, floor insulation has a limited effect on the EPC. Especially in the homes that have no crawling space.
- Heat pumpIn general, the houses of Peled already have an energy efficient boiler and other installations are not financially feasible. In addition, newer techniques – such as heat pumps and infrared panels – do not result in EPC improvements for the homes.
- HR++ glass
Many of the houses already have some double glazing, which makes only a small improvement possible using better insulating glass (HR++ or triple glazing). Since this is a very expensive measure, it was decided to apply it at a natural moment in time, e.g. when the window frames need replacing.
From label F to label B
On the basis of CFP’s advice, Peled was able to secure the financing of the energy-saving measures. The quotations for the measures have all been received and the first measures have already been implemented. This means that almost all of the houses have been upgraded from an EPC F or EPC G to an EPC B or C. The average expected savings per house is more than € 800 per year.