A green roof has a top layer of plants growing in a lightweight medium on top of an impermeable barrier.Benefits include:1. Protect the building against the elements.2. Cut energy costs for heating and cooling due to thermal insulation and mass.3. Prevent rainwater runoff hitting the stormwater drains.4. Absorb CO2.5. Reduce the "urban heat island" effect.6. Promote biodiversity by providing habitat for insects and birds. 7. Improve air quality.Maintenance is similar to the upkeep of a lawn and/or garden. Green roofs can be retrofitted, although it's more cost-effective to install them during construction.

Traditional construction is slow and labour-intensive. That's a problem when you have an undersupply of housing and skills.The fast REZICAST system offers precast concrete panels that can be used in place of timber trusses and brick walls. Lock-up is achievable in as little as 10 days.The panels offer unsurpassed structural strength, superior energy and sound insulation, less site rubbish and water usage.  Manufactured locally then trucked to site, they are craned into place with on-ground help from labourers. By minimising the time carpenters and bricklayers would otherwise spend at height, there are also WHS benefits.More information: https://rezicastsystems.com/

Many of Australia's iconic "three storey walk-up" unit blocks are old and in desperate need of modernisation. Without external capital, however, the renovation bill has to be funded by the unitholders via strata levies.At the same time, there are very few greenfield (or brownfield) residential development sites in our popular (and crowded) inner cities.  An innovative solution is to use airspace and literally go "up on roof".  Strata corporations can develop this space themselves (if they have the means), or sell the airspace to one of their members, or a property developer.It's a win/win.More information: https://www.buyairspace.com.au/