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--- planning:refurbishment_with_passive_house_components [2025/06/30 15:07] – [How we renovate matters] yaling.hsiao@passiv.de
+++ planning:refurbishment_with_passive_house_components [2025/08/08 13:03] (current) – [How we renovate matters] yaling.hsiao@passiv.de
@@ Line 18: / Line 18: @@
 Poor quality refurbishments can result in lock-in effects with suboptimal improvements typically left untouched for decades, if not generations. We simply cannot afford the resulting missed opportunities for energy savings and emissions reductions. Truly high performance refurbishment with a fabric first approach has the power to substanitally mitigate climate impacts while providing manifold other benefits (as outlined below). On a societal level, high-performance renovations will also dampen peak loads on our energy grids, boost our energy independence and facilitate out transition to a renewables-based energy supply, thus further contributing to our climate goals.
-[{{:picopen:lock_in.png?width="500"height="500 |Comparison of a building's energy demand following either shallow retrofit (dark green) or deep retrofit measures at every refurbishment step. Choosing mediocre efficiency levels will lock in the long-term energy performance of the building, the so-called "lock-in effect").}}]
+[{{:picopen:lock_in.png?width="500"height="400|Comparison of a building's energy demand following either shallow retrofit (dark green) or deep retrofit measures at every refurbishment step. Choosing mediocre efficiency levels will lock in the long-term energy performance of the building, the so-called "lock-in effect").}}]
+Another important advantage of high energy efficiency is that higher surface temperatures inside the building prevent mould growth and thus expensive structural damage. Good thermal insulation not only ensures greater comfort, it also actively protects the building fabric. \\
+{{:picopen:feuchtschaeden_raeume_2018_alterzustand_en_passipedia.jpg?430|}} {{:picopen:feuchteschaeden_raeume_2018_neuer_zustand_en_passipedia.jpg?430|}}
-==== Benefits of deep energy refurbishment ====
-When the focus of refurbishment is expanded to prioritise energy efficiency, we not only reduce energy consumption but also enhance comfort and health benefits while combatting energy poverty - a triple win.
-  * Living comfort significantly improved due to warm walls, floors, and window surfaces
-  * No draughts, condensation, or mould
-  * Improved air quality due to constant supply of fresh air with a pleasant temperature
-  * Reduced operating costs due to lowered energy demand, thus protecting against fluctuating energy prices and alleviating fuel poverty
-  * Significant reduction of operational CO2 emissions due to a lower heating demand
 ==== Five Passive House principles applied to existing buildings ====
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 ===== Economic feasibility =====
-[{{ :picopen:outphit_giessen.png?400|The refurbishment of this multifamily building in Giessen, Germany achieved measured heating savings of more than 70 %. This success story confirms the potential of energyefficient refurbishment of existing buildings}}]
+[{{ :picopen:outphit_giessen.png?400|The refurbishment of this multifamily building in Giessen, Germany achieved measured heating savings of more than 70 %. This success story confirms the potential of energy-efficient refurbishment of existing buildings}}]
 For achieving cost efficiency, it is crucial to couple the energy-saving measures with renovation measures that would have been necessary in any case. For example, if the facade needs to be renovated anyway, then the additional expenditure for simultaneous thermal insulation to the Passive House Standard will remain manageable. Nowadays, it is possible to carry out better measures at low differential costs, later installation would require the same effort once again for scaffolding, installing, protection from weather, etc. That is why, from the very beginning, great attention must be paid to a high quality of the thermal and energy-relevant aspects of each procedure.