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planning:airtight_construction:general_principles:principles_for_improving_airtightness

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planning:airtight_construction:general_principles:principles_for_improving_airtightness [2015/05/12 13:21] – [Principles] mschuerenplanning:airtight_construction:general_principles:principles_for_improving_airtightness [2015/09/14 15:30] (current) – [Multimedia] wfeist
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 ====== General principles for improving airtightness====== ====== General principles for improving airtightness======
  
-===== Principles =====+===== Key Principle =====
  
 The key principle for planning the airtightness of a building is that of the "continuous uninterrupted airtight building envelope", that can be outlined using the “red pencil method” (see the //**following illustration**//). It should be possible to trace the whole building envelope with a pencil without any breaks in each sectional drawing. In the details it must be made clear how the airtight connection is realised.  This makes it clear that airtightness is **primarily a planning task**. Craftsman can only carry this out in an airtight manner if it has been thoroughly designed.\\ The key principle for planning the airtightness of a building is that of the "continuous uninterrupted airtight building envelope", that can be outlined using the “red pencil method” (see the //**following illustration**//). It should be possible to trace the whole building envelope with a pencil without any breaks in each sectional drawing. In the details it must be made clear how the airtight connection is realised.  This makes it clear that airtightness is **primarily a planning task**. Craftsman can only carry this out in an airtight manner if it has been thoroughly designed.\\
 \\ \\
 |{{ :picopen:stiftregel_luftdicht.png }}| |{{ :picopen:stiftregel_luftdicht.png }}|
-|//**Details are important – but what is more important is the\\ basic concept. A building envelope can only be airtight\\ if it consists of just one uninterrupted airtight envelope\\ enclosing the whole heated space (red line).**//|\\+|//**Details are important – but what is more important is the\\ basic concept. A building envelope can only be airtight\\ if it consists of just one uninterrupted airtight envelope\\ enclosing the whole conditioned space (red line).**//|\\
 \\ \\
 It is essential that only a **single** airtight layer is planned and implemented. Two “nearly” airtight layers will serve no purpose – leakage will still take place! This can be visualised, for example, by a leakage in the entrance door of a house, where a leaking door in the lobby won’t remedy the problem, or two buckets, both with a hole in the bottom; if one is placed inside the other, this won’t stop the water from leaking out! It is essential that only a **single** airtight layer is planned and implemented. Two “nearly” airtight layers will serve no purpose – leakage will still take place! This can be visualised, for example, by a leakage in the entrance door of a house, where a leaking door in the lobby won’t remedy the problem, or two buckets, both with a hole in the bottom; if one is placed inside the other, this won’t stop the water from leaking out!
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 ====== Multimedia ====== ====== Multimedia ======
  
-[[http://www.passivehouse-international.org/index.php?page_id=181#insulationandairtightness|Video on insulation and airtightness]]+{{youtube>nGvxYAlhhPM?small}} 
 +Video on insulation and airtightness 
 + 
planning/airtight_construction/general_principles/principles_for_improving_airtightness.1431429694.txt.gz · Last modified: 2015/05/12 13:21 by mschueren