POTENTIAL AIR LEAKAGE SITES

1. Around the ends of floor joists or joist hangers
2. Beneath inner window sills and around window frames
3. Through windows and/or hollow window frames
4. Through and around doors – particularly double doors
5. Beneath doors and doorframes
6. Along the top and bottom edges of skirting boards
7. Between and around sections of suspended floors, usually timber floorboards
8. Around loft hatches
9. Through the eaves
10. Around rooflights
11. Through gaps behind plasterboard on dabs or hollow studwork walls
12. Cracks or holes through a masonry inner leaf
13. Around supplies from external meter boxes
14. Around wall mounted fan or radiant heaters; around and through fused spurs and pull switches
15. Around boiler flues
16. Around water and heating pipes that penetrate into hollow floor voids and partition walls
17. Around waste pipes passing into floor voids or boxed in soil stacks
18. Around waste pipes passing through walls
19. Gaps around heating pipes
20. Around and through recessed spotlights
21. Around waste pipes, gas and water supplies, cables, which penetrate the lower floor
22. Hole around the top of a soil stack
23. Through MVHR or warm air heating systems; around terminals
24. Gaps around pipes to cold water and/or heating header tanks
25. Around and through wall-mounted extract fans, cooker hood vents, tumble dryer vents
26. Around and through ceiling roses
27. Through room thermostats and heating controllers
28. Behind polystyrene coving along wall to roof joints
29. Where locks and bolts prevent effective draughtproofing
30. Around internal timber joists that penetrate plaster walls
31. Through subfloor air supplies to solid fuel heaters
32. Through gaps in the casings of MVHR units
33. Up chimneys, particularly where flue dampers are not fitted
34. Through airbricks and partially closable hit-and-miss vents
35. Through window spinner vents
36. Around and through closed trickle vents
37. ……….etc.