The Treehouse 2016

HOUSE NAME
The Treehouse
Address:
North Narrabeen 2101
Housing Type
Standalone House
House Size
228q.m
Number of bedrooms
4
Number of bathrooms
3
Builder
Owner Built
Project Type
New Build
Architect/Designer
Envirotecture
Opening Hours
10-4

The owners of this award winning house wanted a sustainable home that would cater for their growing family, a separate granny flat for overseas visitors all with a tree house feel.

The site in North Narrabeen that had lots of established trees, views to the coast and was very steep, sloping away from the road. This contributed to the challenge of providing universal access to the main living area of the house.

The budget was modest, dictating the construction method remained lightweight. Therefore the best insulation details and thermally broken, double glazed windows were installed to help maintain the house’s passive solar approach. Hydronic heating was also installed to boost the comfort levels in winter.

Under the garage, 4 x 18,000L rainwater tanks harvest the roof water used for the whole of house. a 2.5 Kw PV system provides the houses electricity needs and the solar hot water system with gas boost provides the domestic hot water and hot water for the hydronic heating and on occasion the suspended pool.

The house is clad in a combination of Weathertex weatherboards and Colorbond steel providing a durable and sustainable exterior. Windows and doors are AWS Thermal Heart thermally broken double glazed products. Emu Timbers supplied the pre-weathered recycled bluegum cladding at the entry and poolside walls. Insulation is Greenstuf post-consumer recycled PET, and double sided foil.

All timbers used are recycled, FSC or bamboo and all paints are zero or low VOC.

A webinar featuring this property, it’s owners and our very own Dick Clarke was cast in June 2012.

This project won the Sustainable Residential Building Award 2013 at the Building Design Australia design awards, in August 2013.

It also won an award from the manufacturers of the thermally broken double glazed windows and doors, AWS Vantage, in 2012, for its use of the Thermal Heart suite.

SUSTAINABLE FEATURES

Cost estimate of sustainable home/features
$100,000
Energy rating type
BERS/BASIX
Energy rating
7.4
Universal Design Features
Multi-generational
Adaptive design
Building Type
Lightweight construction
Timber
Recycled and reused
Timber
Insulation
Sustainable materials
Recycled Bluegum cladding, recycled poly insulation, high performance insulation, breathable wall system
Healthy home materials
low-VOC paints, high level daylighting and ventilation
Windows and Doors
Double glazing
Window/door materials and coverings
Aluminium
Thermally broken aluminium frames
Renewable energy
Solar PV grid connect
Water heating
Solar hot water (evacuated tube)
Passive heating cooling
Shading
Cross ventilation
Active heating cooling
Solar hydronic
Ceiling fans
Insulation
Ceiling
Type: Foil + polyester batts,
Rating: R6.5 total
Internal and external walls
Type: Breathable wall wrap with cavity cladding, R2.0 wall batts,
Rating: R2.1
Floor
Type: Foam/foil board,
Rating: R1.5
Water harvesting and water saving
Underground storage
Type: 4 tanks,
Size: 72,000 litres
Low flow shower heads
Low flow taps
Storage connected to
Garden
Toilet
Laundry
Whole house
Energy efficiency
Efficient lighting
Draught proofing
Efficient appliances
Energy monitoring
Garden/Outdoors
Drip irrigation
Water wise plants
Edible garden
Organic
Composting
Native plants
Chickens
Previously Open
2014, 2015
Council property located in:
Pittwater/Northern Beaches
Connected to gas?
Yes