1. Timber as a sustainable building material B+C Design Construct Bala Residence

9. Carbon cycle Carbon IN Carbon OUT Over long term Carbon in ~ carbon out Growing Trees absorb lots of C0 2 Large trees die by losing leaves then falling over

10. Environmental considerations Managed Native Forest Plantation Growing Trees Over long term Carbon removed from atmosphere > carbon released into atmosphere New trees planted Harvesting Removes Carbon C0 2 IN C0 2 OUT

11. Harvesting timber

13. Timber is cellular!

15. Grading for forest products

20. Life cycle impacts of major building materials . Source: ATHENATM Sustainable materials Institute, undated

23. Timber flows through the economy.

26. Durability Biological/ Physical Hazards: Weathering Fire Chemical Fungi Termites / borers Marine Timber: Species Natural durability of heartwood Design Detailing Minimises exposure to hazards Maintenance ensures protection remains functional Treatment enhances durability of sapwood

31. Timber is an energy efficient material Timber uses less energy to make!