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planning:refurbishment_with_passive_house_components:thermal_envelope:airtightness

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planning:refurbishment_with_passive_house_components:thermal_envelope:airtightness [2019/02/07 11:40] – cblagojevicplanning:refurbishment_with_passive_house_components:thermal_envelope:airtightness [2022/02/15 19:37] (current) – admin
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 In particular, airtightness has the following advantages: In particular, airtightness has the following advantages:
   * prevention of moisture related building damage   * prevention of moisture related building damage
 +
   * prevention of drafts and cold feet   * prevention of drafts and cold feet
 +
   * prevention of high heat losses due to infiltration   * prevention of high heat losses due to infiltration
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   * improvement of sound insulation   * improvement of sound insulation
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   * improved indoor air quality (e.g. prevention of pollution with radon from the ground)   * improved indoor air quality (e.g. prevention of pollution with radon from the ground)
  
 An adequate level of airtightness is the basis for: An adequate level of airtightness is the basis for:
   * the use of a variable demand-oriented ventilation (functioning with directed air flows) and   * the use of a variable demand-oriented ventilation (functioning with directed air flows) and
 +
   * the effectiveness of the thermal insulation without air flowing through it   * the effectiveness of the thermal insulation without air flowing through it
  
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 <WRAP center 60%> <WRAP center 60%>
-<latex> +$$
 \Large{n_{50} = \dfrac{V_{50}}{V} \: [\dfrac{1}{h}]} \Large{n_{50} = \dfrac{V_{50}}{V} \: [\dfrac{1}{h}]}
-</latex>+$$
 </WRAP> </WRAP>
  
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 <WRAP center 60%> <WRAP center 60%>
-<latex> +$$
 \Large{q_{50} = \dfrac{V_{50}}{A} \: [\dfrac{m³}{hm²}]} \Large{q_{50} = \dfrac{V_{50}}{A} \: [\dfrac{m³}{hm²}]}
-</latex>+$$
 </WRAP> </WRAP>
  
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 Besides the basic principles, the following guidelines are helpful for successful planning of the airtightness – whether for a new construction or for a refurbishment of an old building (based on [[planning:refurbishment_with_passive_house_components:thermal_envelope:airtightness:special_features_in_modernisations#Literature|[Feist 1995] ]]): Besides the basic principles, the following guidelines are helpful for successful planning of the airtightness – whether for a new construction or for a refurbishment of an old building (based on [[planning:refurbishment_with_passive_house_components:thermal_envelope:airtightness:special_features_in_modernisations#Literature|[Feist 1995] ]]):
   * **simplicity**: in order to prevent any deficiencies in the workmanship, all construction details should be as simple to carry out as possible   * **simplicity**: in order to prevent any deficiencies in the workmanship, all construction details should be as simple to carry out as possible
 +
   * preferably **large uniform** areas with a simple basic construction   * preferably **large uniform** areas with a simple basic construction
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   * selection of reliable and proven basic construction techniques – it is not necessary to develop completely new or exceptional sealing systems   * selection of reliable and proven basic construction techniques – it is not necessary to develop completely new or exceptional sealing systems
 +
   * **adherence to common principles** when planning different connections   * **adherence to common principles** when planning different connections
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   * in principle, any **penetrations** of the sealing envelope should be avoided or minimised\\   * in principle, any **penetrations** of the sealing envelope should be avoided or minimised\\
 \\ \\
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 Therefore, in new constructions as well as in modernisations, in practice particular attention must be paid to the following points for implementing an airtight building envelope: Therefore, in new constructions as well as in modernisations, in practice particular attention must be paid to the following points for implementing an airtight building envelope:
   * Preliminary planning   * Preliminary planning
 +
   * Coordination of the trades (order)   * Coordination of the trades (order)
 +
   * Time schedule   * Time schedule
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   * Monitoring of implementation\\   * Monitoring of implementation\\
 \\ \\
planning/refurbishment_with_passive_house_components/thermal_envelope/airtightness.1549536030.txt.gz · Last modified: 2019/02/07 11:40 by cblagojevic