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).
- Workshop Presentation
- The unexplained temp’ data logging slide at the end of the powerpoint shows what can be achieved if you insulate and draught seal well – the internal temp remains much more stable and comfortable.
- Test Report before before retrofit
- Test Report after retrofit
Other useful links:
- Draught-proofing case study
- ACTSmart Home Energy Advice Service
- Lish’s Green It Yourself DIY videos
- Jenny’s Thermal Imaging and Sustainable Housing
Photos taken of this House Blitz Workshop.