Westbury Hemp House – an owner builder continuing journey 2020

This profile is written and maintained by the homeowner, architect, or builder. You can ask them questions about their home in the comments below.

Location
Westbury TAS 7303
    • Housing Type:
    • Standalone House
    • Project Type:
    • New Build
    • Builder
    • owner builder

About Westbury Hemp House – an owner builder continuing journey

An owner built (still in progress) hempcrete house on a small (840m) block in the centre of the small village of Westbury, Tasmania. After sustainably renovating a previous property, which was open for SHD many times, the next step was to build a simple two bedroom, small footprint house from hempcrete. The brief was to create a house with as few layers of materials as possible. The mantra is natural, recycled, less waste. Also a house that stores more carbon than it releases was very attractive in the time of rampant climate change. Future proofing with the house all on one level, easy access, wider doors, low bills were also part of the thinking.

This house achieved a NatHERS rating of 6.8 stars using NatHERS accredited software.

Find out how the star ratings work on the Nationwide House Energy Rating Scheme (NatHERS) website.

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SUSTAINABLE FEATURES

Years Open
2020
ENERGY AND WATER EFFICIENT FEATURES
    • Energy efficiency:
    • Draught proofing
      Efficient lighting
      Efficient appliances
    • Passive heating cooling:
    • Cross ventilation
      Passive solar designed home
      Thermal mass
    • Water heating:
    • Hot water heat pump
    • Water harvesting and saving features:
    • Low flow shower heads
      Low flow taps
    • Energy Efficient Lighting
    • LED lights throughout
      Natural daylight
    • Electric Vehicle Type
    • hyundai ioniq 38kwh
    • Window Protection:
    • Eaves
SUSTAINABLE & RECYCLED MATERIALS
    • Sustainable materials:
    • double glazing, solar, battery, insulated slab, wide eaves, clay paint, lime render, recycled materials
    • Recycled and reused materials:
    • Basins/sinks
      Benchtops
      Bottles
      Light fixtures / fittings
      Paving
      Rocks/stone
      Timber
INSULATION SPECIFICATIONS
    • Insulation Type:
    • Ceiling
      Internal walls
      External walls
    • Ceiling Type:
    • Bulk – glass wool
    • Ceiling Rating:
    • R7.0
    • Internal Walls Insulation Type:
    • earthwool (some). Hempcrete
    • Internal Walls Insulation Rating:
    • R2.7
    • External Walls Rating:
    • R5.0
    • External Walls Type:
    • Hempcrete
RENEWABLE ENERGY SPECIFICATIONS
    • All-Electric Home?
    • Yes
    • Renewable energy used:
    • Energy storage/battery
      Solar PV grid connect
    • Size of PV system:
    • 9.99kW
COSTS AND COST SAVINGS
    • Total cost of home when constructed:
    • $390,000 in 2020
    • Cost estimate of sustainable home/features:
    • $75,000
HOUSE DESIGN SPECIFICATIONS
    • House Size
    • 110m2
    • BAL Rating
    • BAL – 12.5: Ember attack with heat up to 12.5kW/m2
    • Roof
    • Metal (Colorbond)
    • Wall Materials
    • Hempcrete
      Metal (Colorbond)

    • Wall Materials
    • cement sheet
    • Window and Door Types
    • Double glazing
      Tilt and turn
    • Universal design accessability
    • Adaptive design
      Universal access
    • Universal Design Features
    • 80cm minimum door opening width
      Hobless showers
      Lever handles for doors (no knobs)
      No stairs/steps
      Semi recessed basins
      Shower head on rail for various heights
      Tapware to be easily accessed from outside the shower
    • Number of bedrooms
    • 2
    • Number of bathrooms
    • 1
GARDEN AND WASTE REDUCTION
    • Garden / Outdoors
    • Composting
      Edible garden
    • Waste Reduction Practices:
    • Compost all food scraps
      Make jams/conserves
      Pickle and preserve food
      Recycle
      Repair
      Swap with friends and neighbours
      Waste free/reduced construction site
HEALTHY HOME FEATURES
    • Healthy home features
    • Carpet free - tiles/concrete/timber flooring throughout
      Chemical free cleaning products used
      Cross flow ventilation
      Lime render/wash
      Natural oil sealer/finishes
      VOC free paints/sealer/varnish
      Wax based sealer/finish

    • Healthy Home
    • clay paint

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