Hemp House and Studio 2017

House Notes – Hemp House and Studio

Our journey to build our very own sustainable home began when we joined an ecovillage community in Chidlow Western Australia called ‘Somerville‘. The project was being designed from 2004 to 2010 and was a world first, world class experiment in sustainable village design for 110 families. Unfortunately the project collapsed during the Global Financial Crisis.

We learnt a great deal from being part of the Somerville Community. Maybe the greatest lesson was the incredible amount of effort required to start something from scratch. When looking for a new place to live we began to dream of a small, vibrant, rural town that would be able to be retrofitted into a sustainable ecovillage by a willing community. Our research led us across Australia to the Northern Rivers Region and the wonderful town of Mullumbimby.

In late 2012 our family of 4 moved to Mullumbimby and chose to buy an affordable and small block at Tallowood Ridge Estate which is about a 2.5km bike ride to the town centre. The 520m2 block we chose is slightly elevated, has a great northern aspect that would never be built out and a ridge to the west for shading the hot summer afternoon sun. To the south of the block is some public space that connects with a shelter belt along the ridge that stretches all along the southern boundary of Tallowood; a great place to go for bush walks and catch glimpses of the amazing variety of fauna living in the established, old habitat trees.

We immediately began designing our home with Jaye Irving from Barefoot Sustainable Design in early 2013. We were inspired by small homes with grand features that we had seen in Montana – 2 bedroom log cabins with a massive open plan ‘Grand Room’ with big windows to capture the winter sun. Much of the final floor plan came from this initial inspiration with the addition of a few outdoor living spaces, small private courtyard spaces and a studio to build at a later stage for when our family needed the space. We ended up with a solar passive plan that we quickly fell in love with and one that could be built in a few different stages over time to keep it affordable.

The first part to be built was the 2 bedroom, 1 bathroom main house. We began looking at a range of alternative and sustainable materials to be used and builders who had experience in the Byron area. While attending a workshop on using Hemp at the Green Building Centre in Byron I was introduced to Corey Thompson who had recently completed a small renovation project in MacLean using Klara Marosszeky’s Australian Hemp Masonry Method. We were sold on using this method primarily because the Hemp was all sourced within NSW and also Klara’s method did not require the use of any cement. Corey was also the only builder in the entire Byron Region that had experience with this building material at the time, so we signed him up.

During the build we kept a close eye on gumtree for second hand building materials. We sourced all of our external timber doors, the internal spiral staircase and the hardwood timber flooring used in most of the house from gumtree. This not only saved us quite a lot of money but also was great to be able to re-use existing materials.

Some of the other sustainable features of the home built in this initial stage include the 24,000L water tank which is used as our main source of water for the entire house, large windows to the north which bring in the winter sun to be stored in the polished concrete floors, heating the home throughout the winter. We also installed 2 water saving toilets that have the hand wash basin above the cistern. The home is connected to high speed internet via the NBN allowing me to work efficiently from home to reduce the need to travel to and from a work place.

The initial parts of the house were completed in April 2015 and then we were finally able to move in to complete the kitchen, painting and installing the recycled timber floors ourselves.

In August 2015 we began the next phase of our project. The building of our 1 bedroom/1 bathroom tinyhouse inspired studio, the external decking areas and permaculture landscaping.

The Studio was built by Nicholas Jouin who already had great experience building from sustainable materials with his company Permastructure. We ran another Hemp Workshop with Klara from the Australian Hemp Masonry Company so that Nicholas and a few other builder in the area would learn about using the product. Hemp Masonry was used on the western wall of the Tiny House for sound proofing/insulation and breathability.

Our landscaping design was designed and completed by Daniel Kemp from Elemental Gardens and incorporates 3 large raised garden beds to the north of our property that we share with our neighbour as a community garden space.

Matty from Sparrow Building Services helped complete our decks front and back recycled timber decks and also helped with other small creative projects inside the house.

Recently our Electrician Tim Hodgson from Light Touch Solar & Electrical installed an inline fan to draw air from the warmer loft area of the house that heats up during the day, into the office space in our main bedroom that is on the southern side of the property.

Our family likes to live simple, having less things around the home allows room for creativity and inspiration. The rooms in our home have been designed to be multipurpose. We sleep on Tatami and Futons from Zentai so that they can be easily packed away to transform the space for work, dance or yoga. We don’t have a TV or a couch, instead we have a large rug and cushions so that the open space can be transformed easily into a family room, dining room or entertaining room. We eat at a low, Japanese inspired recycled Jarrah table so that we don’t need chairs. Our house has a Climbing Wall and a Circus Silk so that we can enjoy exercise within our home. We don’t have a laundry room and instead have a laundry closet space.

Sustainability Features

Years Open
2015
2016
2017
ENERGY AND WATER EFFICIENT FEATURES
    • Energy efficiency:
    • Efficient lighting
      Draught proofing
      Efficient appliances
      Energy monitoring
    • Passive heating cooling:
    • Shading
      Cross ventilation
    • Active heating cooling:
    • Ceiling fans
    • Water heating:
    • Solar hot water (flat panel)
    • Water harvesting and saving features:
    • Underground storage
      Low flow taps
      Storage connected to
    • Underground rainwater storage type:
    • Concrete
    • Underground rainwater storage Size:
    • 24000
    • Storage connected to
    • Garden
      Toilet
      Laundry
      Whole house
SUSTAINABLE & RECYCLED MATERIALS
    • Recycled and reused materials:
    • Staircase, Decking
    • Sustainable materials:
    • Hemp Masonry, Recycled Doors
    • Recycled and reused materials:
    • Concrete
      Timber
      Doors
      Glass

INSULATION SPECIFICATIONS
    • Insulation Type:
    • Ceiling
      Internal and external walls
    • Ceiling Type:
    • Insulated Panels
    • Ceiling Rating:
    • 3.6
    • Internal / External Walls Type:
    • Hemp Masonry | Zincalume Steel/Plaster Board
    • Internal / External Walls Rating:
    • 4.2 for Hemp and 2.5 for other walls
RENEWABLE ENERGY SPECIFICATIONS
    • Energy star rating:
    • 8
    • Renewable energy used:
    • Solar PV grid connect
COSTS AND COST SAVINGS
    • Cost estimate of sustainable home/features:
    • Under ground 24KL Water Tank ~ $7000, 2KW Solar PV System ~ $4400, Solar HWS ~ $3500, Hemp Masonry ~ +30% on alternative building materials, Insulated Blinds ~ $600-800 per window.
    • Estimate of annual savings:
    • Water Tank ~ $800/year, PV System ~ $600/year, Solar Passive Design and Materials ~ $1000/year on heating and cooling
HOUSE DESIGN SPECIFICATIONS
    • House Size
    • 185m2
    • Window and Door Types
    • Louvre windows
    • Universal Design Features
    • Disability access
      Multi-generational
      Adaptive design

    • Universal Design Features
    • Home Recreation - Climbing Wall/Circus Silk
    • Number of bedrooms
    • 3
    • Number of bathrooms
    • 2
GARDEN AND WASTE REDUCTION
    • Garden / Outdoors
    • Water wise plants
      Edible garden
      Organic
      Community garden
      Native plants
HEALTHY HOME FEATURES
    • Healthy home features
    • Hemp Masonry
Location
Mullumbimby NSW 2482
    • Housing Type:
    • Standalone House
      Tiny Home
    • Project Type:
    • New Build
      Continual Improvement
    • Builder
    • Permastructure, Sparrow Building Services, Xylosinuous, Elemental Gardens and Landscaping

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