BPIE: Europe's buildings under the microscope - PU Europe

Deep renovation path
By the end of this decade, deep renovations become the dominant activity and remain so until 2050.
nZEB renovations accelerate from 2020 onwards, such that they account for 30% of the total by 2050, by
which time both minor and moderate each account for just 5% of the total.
Figure 3B5 – Deep renovation path
Source: BPIE model
% renovations by depth
100%
80%
60%
40%
20%
0%
2010 2015 2020 2025 2030 2035 2040 2045 2050
nZEB deep moderate minor
Two-stage renovation path
A fourth renovation path depicts the case in which some properties are renovated twice, though with
different measures. Properties that undergo minor or moderate renovation between 2011 and 2030, with
e.g. new windows and heating systems, are then upgraded 20 years later, to deep and nZEB standards
respectively. These second round of renovations occur in addition to first time renovations, which follow
the Medium scenario – therefore, the two-stage and Medium scenarios are identical to 2030.
Figure 3B6 – Two-stage renovation path
Source: BPIE model
% renovations by depth
100%
80%
60%
40%
20%
0%
2010 2015 2020 2025 2030 2035 2040 2045 2050
moderate to nZEB minor to deep nZEB deep minor moderate
112 | Europe’s buildings under the microscope