Djildjit 2019

HOUSE NAME
Djildjit
Address
White Gum Valley WA 6162
Open
10am – 4pm
House Open Style
Open House – No booking required
Housing Type
2-apartment development
Project Type
New Build
Builder
Craig Bailey, Ecovision Builder
House Size
60m2
Number of bedrooms
1
Number of bathrooms
1
Open with support of
Solar Dwellings

LAND SELECTION
Landcorp’s WGV estate was chosen for its sustainability features (including One Planet Living international endorsement), proximity to Fremantle centre, the amenity of the surrounding suburb as well as Booyeembara Park across the road. Purchased in January 2016, Lot 4 WGV (274sqm) was our preferred lot in the estate from an environmental design perspective. It was chosen for its east-west orientation, unobstructed solar access and clear view north up Beazley Way towards the large trees and POS along Stevens St.

DESIGN
Richard Hammond has a long history of achievement in affordable and sustainable housing design. His assistant in this design was graduate architect David Robinson. Passive solar design was a strong focus in the design approach. The development consists of two strata-titled apartments on a single lot 274sqm, with shared amenities including: roof terrace, double garage, laundry, outdoor shower/toilet and gardens. The design complies with the WGV Design Guidelines as well as City of Fremantle sustainability policy. NatHERS energy efficiency rating completed by True North was 7.7 for apartment A and 7.3 for apartment B, or 7.5 overall. Life cycle assessment by eTool gave it the top Platinum rating with total emissions expected 823 kgCO2e per year per occupant = a savings of 80%, equivalent to 6,735 trees planted.

CONSTRUCTION
A traditional Nyoongar smoking ceremony by Marie Taylor was held on the lot prior to construction. First round tender $680,000; second round $580,000, third round $480,000 from Ecovision accepted. Ecovision Craig Bailey runs his practice based on 7 sustainability principles. During construction several design modifications were implemented including roof change from SIPS to studframe and addition of external insulated cladding to south wall expecting the NatHERS rating to improve by 0.7. Construction time was 12 months as per contract completing in February 2018.

MATERIALS
Ground floor walls are stabilised rammed earth (SRE) comprised of 50/50 recycled C&D waste and limestone. Floors are Holcim Ecomax concrete with lower embodied energy. Upper floor walls are 90-mm insulated stud frame with custom orb Colourbond cladding. Roof is Colourbond with R4.0 insulation + R1.5 Anticon. Double glazed windows throughout. In Perth, over 40 tonnes of waste per house is generated during construction with over 15,000 homes constructed each year. Much of this waste could be recycled back into new constructions, as demonstrated here.

ENERGY SYSTEMS
Grid electricity consumption reduced by over 50% with energy efficient design and appliances as well as a shared 5kW solar PV system driving the HVAC and thermal mass as a ‘thermal battery’. Electrochemical battery may be installed at a future date if necessary. Electric car and bike charging can occur in the garage later or at the SHAC charging station next door.

WATER SYSTEMS
While mains water from Water Corp is connected, much water is supplied from shared alternative systems. Toilet flushing and clothes washing is by rainwater, surface irrigation water from the WGV community bore, and subsurface irrigation from greywater. It reduces mains water consumption by over 50%.

DHW, HVAC SYSTEMS
Hot water, space heating and cooling is provided by a 3-in-1 heat pump shared system via hydronic tubes in the ground floor slab and a single FCU in each apartment upstairs. Efficiency of space heating and cooling will be enhanced by attention to sealing around doors, windows and frames, checked by blower door testing. Operation of the integrated solar heat pump system with smart controls will allow the house to perform as a novel “thermal battery” with energy savings expected to be greater than 20%.

Chat to a member of the Australian Electric Vehicle Association (AEVA) about EV’s they will have their Tesla Model S on display for SHD between 10am – 12pm. 

 

This house achieved a NatHERS rating of 7.5 stars using NatHERS accredited software (AccuRate). Find out how the star ratings work on the Nationwide House Energy Rating Scheme (NatHERS) website.

 

This home is supported by

SUSTAINABLE FEATURES

Years Open
2019
Cost estimate of sustainable home/features
Fully integrated
Total cost of home when constructed
$500,000 construction + $40,000 landscaping + $345,000 land for both apartments
Estimate of annual savings
$2,000 for both apartments
Universal design accessability
Multi-generational
BAL Rating
N/A
Roofing materials
Metal (Colorbond)
Wall materials (external and internal)
Lightweight construction (timber frame)
Rammed earth
Window and door types
Clerestory windows
Double glazing
Low-e, films
Sliding windows/doors
Skylights
Window and door shading
Adjustable Shading
Awnings (external)
Blinds
Deciduous tree/vegetation
Drapes/curtains
Recycled and reused
Aggregate
Appliances
Concrete
Timber
Recycled demolition aggregate in concrete floors and rammed earth walls. Recycled jarrah for timber decking.
Insulation - Under roof
Type: Bulk – polystyrene board
Insulation - External walls
Type: Bulk – glass wool
Insulation - Internal walls
Type: Bulk – glass wool
Insulation - Under floor
Type: Bulk - polystyrene board
Healthy home
Airtight house design
Chemical free cleaning products used
Cross flow ventilation
Indoor plants for air filtration
Natural fibre furnishings
Natural light and ventilation
Natural oil sealer/finishes
No carpets
All electric home
Yes
Renewable energy
Solar PV grid connect
Size of PV system
5.5kW
Water heating
Hot water heat pump
Passive heating cooling
Passive solar designed home
Active heating cooling
Heat pump
Hydronic
Split system airconditioner
Solar hydronic
Energy efficiency
Draught proofing
Efficient lighting
Efficient appliances
Energy monitoring
Smart home features
Water harvesting and saving
Underground rainwater storage
Type: GARANTIA Regenwasser Flachtank Li-Lo 5000 L / 1320,9 gal.
Size: 5000L
Grey water system
Stormwater management
Low flow shower heads
Low flow taps
Hot water recirculation
Drip irrigation
Garden / Outdoors
Community vegetable garden
Composting
Drip irrigation
Edible garden
Green roof
Organic
Permaculture
Native plants
Water wise plants
Average Daily Energy Consumption Per Person
2kW
Average Daily Water Usage Per Person
30L per person per day
Waste Reduction
Compost all food scraps
Plastic free household
Recycle
Repair
Swap with friends and neighbours