Enabling change in our Society, Environment and Economy (SEE)

House Blitz – 2014

Draught Proofing Workshop Results: 5 July 2014

On Saturday 5 July 2014, SEE-Change in collaboration with ACTSmart held a House Blitz – Draught Proofing Workshop, where we undertook draught proofing on a typical ex-govie house in Watson.

First of all everyone learnt about why draught proofing is important and the difference between draughts and ventilation. We then did a blower-door test on the house to see just how bad the draughts were, everyone then got ‘hands-on’ to seal the house and finally the house was re-tested to see the difference.

The results were:

  • The air leakage rate was reduced at 50Pa from 18.3 to 15.3 ACH.
  • Another way of expressing this in terms of an equivalent ‘permanently open window’ in the building envelope at roughly normal pressures (4Pa), is that before retrofitting the window was 38cm x 38cm and after draught sealing it was 32 cm x 32 cm (this is called the effective leakage area at 4Pa).

Download documents:

Other useful links:

IR007349 IR007342 IR007341 IR007339 IR007338


Photos taken of this House Blitz Workshop.

SEE-Change_Draught Proof House Blitz Workshop-demonstrations SEE-Change_Draught Proof House Blitz Workshop-Lish explaining sealants SEE-Change_Draught Proof House Blitz Workshop-using a sealant gun

SEE-Change_Draught Proof House Blitz Workshop-sealing gaps SEE-Change_Draught Proof House Blitz Workshop-sealing vent SEE-Change_Draught Proof House Blitz Workshop-sealing vents with range of sealants SEE-Change_Draught Proof House Blitz Workshop-sealing window gaps

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