Greensmart Sustainability

Marneros Constructions is committed to encourage environmental sustainability within its design concepts and practice.

Through good design and energy efficiency planning, we are able to offer homes that exceed the minimum 6 star energy rating on the First Rate Program.

We are an accredited HIA Greensmart Professional, which means we are educated. So what makes a Greensmart Home?

Benefits of a Green Smart home include lower energy and water bills, a warmer house in winter, a cooler house in summer, a healthier home for the occupants and less waste going to landfill.

Green Home Education Awareness

Building or Renovating a home starts with the appropriate site section to ensure that you can maximize passive solar design principles in your home. Getting the orientation right is first.


Orientation refers to the correct placement of the building on the block to allow sun to penetrate in winter and to minimize this in summer. The best site is one, which provides enough room to place a house with the living areas facing north. Renovation projects can consider this by the relocation of rooms to improve passive solar access.

The efficient design of eaves on the northern side lets the sun into the home in winter, warming it naturally and reducing heating bills. It also prevents the hotter summer sun- which is at a higher angle – from entering the home, reducing the need to artificially cool the home in summer.


Insulation should be seen as the first line of defense against the external elements after incorporating passive solar design as it reduces heat loss and heat gain through walls, roofs, floors and flooring systems

Ceilings can account for 25-35 per cent of heat loss

Floor can account for 10-20 per cent of heat loss

Walls can account for 15-25 per cent of heat loss

The correct selection and installation of insulation in the ceilings, floors and walls in conjunction with using thermal mass can achieve significant reductions in heating and cooling costs.

Thermal Mass

Thermal mass refers to the ability of a material to absorb heat energy. High-density materials such as concrete, rammed earth, bricks and tiles have a high thermal mass, which allows them to absorb heat, unlike timber, which has a low thermal mass.

In winter, the correct positioning and treatment of thermal mass has the ability to absorb free heat from the sun during the day and re-radiate the heat through the house at night. In summer, the thermal mass absorbs any heat that has entered the house during the day and cools it at night, which can help reduce internal temperature fluctuations between day and night. To achieve the benefits from materials with a high thermal mass, these should be placed on the inside of the building.


Ventilation is the movement of air through and around the home. Ventilation can be achieved using both mechanical and natural methods. Mechanical methods include ceiling fans and externally ducted exhaust fans. Natural methods include the location and orientation of openings (doors and windows) to allow the home or roof-mounted systems to extract hot air from the roof cavity. It is also important to minimize draughts throughout the home by sealing gaps in doors, windows and exhaust fans. This can reduce heat loss 15-25 per cent.


Your choice of flooring can contribute to your homes thermal performance, i.e. how thermal mass is utilized in the home. Carpets can minimize the benefits of thermal mass by covering and ultimately insulating the thermal mass, i.e. preventing useful accumulated heat from entering via the floor, unlike tiles and concrete floors, which will assist in heat gain through conduction. The colour of flooring can also influence heat absorption, with darker colours absorbing more heat, which can re-radiate into the house.