What are the most common air leakage/infiltration paths?

Common leakage sites are listed in Figure 1 below. Figure 2 gives the classification of these sites in 4 categories [1]:

Figure 1: Vertical section of a typical building with identification of potential leakage junctions (Source: CEREMA - Pôle QERA)

Figure 1: Vertical section of a typical building with identification of potential leakage junctions (Source: CEREMA – Pôle QERA)

  1. Junction lower floor / vertical wall
  2. Junction window sill / vertical wall
  3. Junction window lintel / vertical wall
  4. Junction window reveal / vertical wall (horizontal view)
  5. Vertical wall (Cross section)
  6. Perforation vertical wall
  7. Junction top floor / vertical wall
  8. Penetration of top floor
  9. Junction French window / vertical wall
  10. Junction inclined roof / vertical wall
  11. Penetration inclined roof
  12. Junction inclined roof / roof ridge
  13. Junction inclined roof / window
  14. Junction rolling blind / vertical wall
  15. Junction intermediate floor / vertical wall
  16. Junction exterior door lintel / vertical wall
  17. Junction exterior door sill / sill
  18. Penetration lower floor / crawlspace or basement
  19. Junction service shaft / access door
  20. Junction internal wall / intermediate floor
Figure 2: Common leakage sites classified in 4 categories (Source: CEREMA - Pôle QERA)

Figure 2: Common leakage sites classified in 4 categories (Source: CEREMA – Pôle QERA)

 

[1]F. Carrié, R. Jobert and V. Leprince, “Contributed Report 14- Methods and techniques for airtight buildings,” AIVC, 2012.

 

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