Róisín Dubh House 2021

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House Notes – Róisín Dubh House

Our renovation project was inspired by the need to improve the thermal comfort of our Federation era house. It had no natural light and was freezing in winter. Using a sustainable ethos and passive solar principles, we’re renovating to deliver a house that is more comfortable in all seasons – with minimal reliance on active heating and cooling.

Challenges include managing a tricky west-facing rear aspect, letting in more natural light without getting too hot and working within Council’s heritage parameters.

Our build will deliver improved energy efficiency in the original 1916 building by insulating walls, floors and ceilings to a high standard, and sealing gaps to minimise uncontrolled air leakage. Original windows have been restored and draught sealed. Out the back we are building a highly insulated, airtight extension with a contracted efficiency target of <8 ACH50. Large north-facing windows will admit sun in winter and be shaded in summer. High performance uPVC glazing will allow ventilation as needed and be externally screened with adjustable shading to the north and west. Most household services such as cooking and hot water will be switched from gas to electricity and there are future plans for clean energy generation via solar panels.

Other sustainable elements include rainwater harvesting via a 5000 litre underground water tank, grey water re-use and a focus on using natural and low-tox building materials where possible. We chose to deconstruct rather than demolish to support building material re-use and minimise construction waste. We have re-used or re-homed materials such as bricks and timber framing, windows, doors and other fittings. The footprint of the new addition has been constrained to preserve garden space and existing established trees.

Our build is due to complete in October 2021.

This house achieved a NatHERS rating of 8.3 stars using NatHERS accredited softwareFind out how the star ratings work on the Nationwide House Energy Rating Scheme (NatHERS) website.

 

SUSTAINABILITY FEATURES

Years Open
2021
ENERGY AND WATER EFFICIENT FEATURES
    • Energy efficiency:
    • Draught proofing
      Efficient lighting
      Efficient appliances
      Energy monitoring
      Smart home features
    • Passive heating cooling:
    • Cooling tower
      Cross ventilation
      Deciduous planting around house
      External planting
      Passive solar designed home
      Shading
      Thermal chimney
      Thermal mass
    • Active heating cooling:
    • Ceiling fans
      Heat pump
      Hydronic
      Split system airconditioner
    • Water heating:
    • Hot water heat pump
    • Water harvesting and saving features:
    • Rainwater storage - Underground
      Grey water system
      Stormwater management
      Low flow shower heads
      Low flow taps
      Drip irrigation
    • Underground rainwater storage type:
    • Duraplex rainwater tank
    • Underground rainwater storage Size:
    • 5000L
    • Energy Efficient Lighting
    • LED lights throughout
      Natural daylight
      Skylight
    • Window Protection:
    • Adjustable Shading
      Automation/controls
      Awnings (external)
      Blinds
      Deciduous tree/vegetation
      Drapes/curtains
      Eaves
      External window hoods/surrounds
      Honeycomb blinds
      Pelmets
SUSTAINABLE & RECYCLED MATERIALS
    • Sustainable materials:
    • - Plans modelled by thermal energy assessor prior to DA submission and following Council amendments. Objective to achieve at least 8 stars on the NatHERS scale. - Deconstructed rather than demolished so unwanted materials could be re-used by us or others. - Supplier waste management plan written into the build contract. - Project airtightness objective of less than 8 air changes per hour @ 50 pascals (including the original 1916 dwelling). - Windows and doors selected based on air leakage outcomes, with high SHGC & low U values. - Air leakage test and thermal imaging checks to be conducted to ensure required outcomes are achieved. - Preference for natural, sustainably-produced & low-tox materials - Recycled glass (Silica free) benchtops - Size & footprint of extension controlled to increase garden space & preserve existing trees.
    • Recycled and reused materials:
    • Appliances
      Bath
      Benchtops
      Bricks
      Doors
      Excavated earth
      Floorboards
      Glass
      Insulation
      Timber
      Windows
INSULATION SPECIFICATIONS
    • Insulation Type:
    • Under-roof
      Ceiling
      Internal walls
      External walls
      Floor
    • Ceiling Type:
    • Bulk – polyester
    • Ceiling Rating:
    • 5.3
    • Floor Type:
    • Bulk - polyester
    • Floor Rating:
    • 2.1
    • Under Roof Insulation Type:
    • Reflective foil
    • Under Roof Insulation Rating:
    • 1.0
    • Internal Walls Insulation Type:
    • Bulk – polyester
    • Internal Walls Insulation Rating:
    • 2.5
    • External Walls Rating:
    • 2.5
    • External Walls Type:
    • Blow in – polystyrene balls
RENEWABLE ENERGY SPECIFICATIONS
    • All-Electric Home?
    • No
    • Energy star rating:
    • 8.3
HOUSE DESIGN SPECIFICATIONS
    • House Size
    • 213 m2
    • BAL Rating
    • BAL – Low: There is insufficient risk to warrant specific construction requirements
    • Roof
    • Insulated panel (sandwich panels)
      Metal (Colorbond)
    • Wall Materials
    • Double brick
      Lightweight construction (timber frame)
      Reverse Brick veneer
      Timber
    • Window and Door Types
    • Awning
      Casement
      Double glazing
      Double hung
      Low-e, films
      Pocket doors
      Skylights
      Sliding windows/doors
      Stacking windows/doors
      Tilt and turn
    • Universal design accessability
    • Multi-generational
    • Universal Design Features
    • Hobless showers
      Lever handles for doors (no knobs)
      Loud doorbell/connected to flashing light
      Shower head on rail for various heights
      Slip resistant flooring
    • Number of bedrooms
    • 4
    • Number of bathrooms
    • 3
GARDEN AND WASTE REDUCTION
    • Garden / Outdoors
    • Bee hotels/friendly
      Composting
      Drip irrigation
      Worm farm
    • Waste Reduction Practices:
    • Compost all food scraps
      Recycle
      Repair
      Swap with friends and neighbours
      Waste free/reduced construction site
HEALTHY HOME FEATURES
    • Healthy home features
    • Airtight house design
      Cabinet design to minimise dust collection
      Carpet free - tiles/concrete/timber flooring throughout
      Cross flow ventilation
      Low VOC paints/sealer/varnish
      Natural light and ventilation
      Natural oil sealer/finishes
      Wax based sealer/finish
Location
Ashfield NSW 2131
    • Housing Type:
    • Standalone House
    • Project Type:
    • Retrofit/addition

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