Lewin Home 2025

Lewin Home

Bringing a 1960 double brick home up to Passivhaus EnerPHit standards.

Our clients came to us wanting to renovate and extend their 1960’s double brick home, their hopes were to increase the energy efficiency, remove gas and provide a comfort and healthy home for their growing family.
Our plan of attack was to improve the thermal envelope and make it continuous, fit UPVC double glazed windows, install a HRV system and increase the airtightness of the home.
After some modelling and a blower door test we reached Passivhaus EnerPhit standards and achieved a blower door of 0.82ACH50. This home also achieved a 9.6 start rating in NatHERS.

The results are a healthy, efficient and all year-round comfortable home for our clients.

Sustainability Features

Years Open
2025
ENERGY AND WATER EFFICIENT FEATURES
    • Energy efficiency:
    • Draught proofing
      Efficient lighting
      Smart home features
    • Passive heating cooling:
    • Cross ventilation
      Heat recovery ventilation system
      Passive solar designed home
      Shading
    • Active heating cooling:
    • Ceiling fans

    • Active heating cooling:
    • ducted aircon system
    • Water heating:
    • Hot water heat pump
    • Energy Efficient Lighting
    • LED lights throughout
      Natural daylight
      Skylight
    • Window Protection:
    • Adjustable Shading
      Automation/controls
      Shade Sails
      Solar pergola
SUSTAINABLE & RECYCLED MATERIALS
    • Sustainable materials:
    • The old Jarah roof frame was taken down, machined and used as cladding on another project reused all existing bricks kept most of the existing home
    • Recycled and reused materials:
    • Bricks
      Cladding
      Copper pipes/fittings
      Concrete
      Excavated earth
      House - all materials reused
      Floorboards
      Timber
INSULATION SPECIFICATIONS
    • Insulation Type:
    • Under-roof
      Ceiling
      Internal walls
      External walls
      Floor
    • Ceiling Type:
    • Bulk – glass wool
    • Ceiling Rating:
    • R3.1 soundscreen
    • Floor Type:
    • Spray foam
    • Floor Rating:
    • R2.5
    • Under Roof Insulation Type:
    • 2 x layers for glasswool R2.7
    • Under Roof Insulation Rating:
    • R5.4
    • Internal Walls Insulation Type:
    • 110 common clay brick
    • Internal Walls Insulation Rating:
    • R0.2
    • External Walls Rating:
    • R2.7
    • External Walls Type:
    • Glass wool to revers brick veneer, cavity bead to double brick walls
RENEWABLE ENERGY SPECIFICATIONS
    • All-Electric Home?
    • Yes
    • Energy star rating:
    • 9.1 after airtightness increased to 9.6
    • Renewable energy used:
    • Solar PV grid connect
    • Size of PV system:
    • 10.8kw
HOUSE DESIGN SPECIFICATIONS
    • House Size
    • 230m2
    • BAL Rating
    • BAL – Low: There is insufficient risk to warrant specific construction requirements
    • Roof
    • Green roof
      Metal (Colorbond)
    • Wall Materials
    • Double brick
      Lightweight construction (timber frame)
      Reverse Brick veneer
    • Window and Door Types
    • Awning
      Double glazing
      Retrofit Double Glazing
      Skylights
      Sliding windows/doors
      Tilt and turn
    • Universal Design Features
    • 80cm minimum door opening width
      Hobless showers
      Lever handles for doors (no knobs)
    • Number of bedrooms
    • 4
    • Number of bathrooms
    • 2
    • Healthy Home Materials
    • Airtight house design
      Automated ventilation system
      Carpet free - tiles/concrete/timber flooring throughout
      Cross flow ventilation
      Heat recovery ventilation (HRV)
      Indoor plants for air filtration
      Low VOC paints/sealer/varnish
      Natural light and ventilation
      VOC free paints/sealer/varnish
GARDEN AND WASTE REDUCTION
    • Garden / Outdoors
    • Bee hotels/friendly
      Green roof
      Local indigenous plants
    • Waste Reduction Practices:
    • Recycle
HEALTHY HOME FEATURES
    • Healthy home features
    • Airtight house design
      Automated ventilation system
      Carpet free - tiles/concrete/timber flooring throughout
      Cross flow ventilation
      Heat recovery ventilation (HRV)
      Indoor plants for air filtration
      Low VOC paints/sealer/varnish
      Natural light and ventilation
      VOC free paints/sealer/varnish
Location
Scarborough WA 6019
    • Housing Type:
    • Standalone House
    • Project Type:
    • Retrofit/addition
    • Builder
    • Xon Construction
    • Designer
    • Howes design Co

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