Apex Point House 2024

House Notes – Apex Point House

In recent years Tasmania (like the ACT) has restricted new homes to have a maximum BAL- 29 bushfire rating in order to save lives at a time of increasing bushfire hazard. In these jurisdictions, BAL-Flame Zone houses will no longer be built easily or in-expensively externally renovated. This project however, with official BAL-29 rating is designed and built to the higher bushfire rating of BAL-40.

Located in a challenging high-wind outlook of the Tasman Peninsula near Port Authur, it sits on top of a rise with low-level native vegetation below – inherently bushfire risky. However, with dual qualifications in landscape and architecture, Ian Weir was especially conscious of minimising disturbance to the biodiverse vegetation when siting the house. Vehicle access arises from the safer rear orientation, whilst the dwelling retains nearly all the original site vegetation un-touched other than for large water storage tanks.

Ian says he is obsessive about conserving biodiversity and views architecture as an instrument for seeing and connecting to our extraordinary biota. “To get meaningful proximity between people and that biota I have to be super objective about fire risk – it comes with the territory.”

A very careful site of the house and landscape managements plan, so that its defendable zone (APZ) didn’t destroy the biodiversity on the site. With constant 40 knot plus winds battering the house, it was designed to be resilient to both the wind and bushfire, while making the most of the views.

With 180m2 area including an insulated timber frame covered in ‘Firefly’ highly fire-resistant sarking, it rises from a concrete slab base. It has a simple skillion roof form that sheds burning embers. Its finished visually with dark colorbond metal cladding for a striking appearance.

Ian says, “in WA and Tas, regardless of how fireproof your house is you are forced to clear BAL-29 asset protection zones. This means you have no option other than to significantly modify the landscape around your homes. With this constraint in mind, I had to be obsessive about the siting of the house in this extremely windy and biodiverse spot – so that that veg management for bushfire regulations didn’t trigger wind erosion and create a place you didn’t want to be”.

“The house site is surrounded on three sides by very botanically rich coastal heath – which flowers perennially and looks remarkable. With a skilled landscape ecologist who was also a botanist and bushfire risk assessor, the clients and I leant that we didn’t have to remove this important vegetation – we could slash it lightly with a low impact lawn mower to reduce the fuel load but not the biodiversity – in that way we able to create the compliant Asset Protection Zone without having to remove any plants.”

Sustainability Features

Years Open
2024
ENERGY AND WATER EFFICIENT FEATURES
    • Energy efficiency:
    • Draught proofing
      Efficient lighting
      Efficient appliances
    • Passive heating cooling:
    • Passive solar designed home
    • Active heating cooling:
    • Hydronic
    • Water heating:
    • Hot water heat pump
    • Water harvesting and saving features:
    • Rainwater storage - Underground
      Stormwater management
    • Energy Efficient Lighting
    • LED lights throughout
      Natural daylight
INSULATION SPECIFICATIONS
    • Insulation Type:
    • External walls
RENEWABLE ENERGY SPECIFICATIONS
    • All-Electric Home?
    • Yes
COSTS AND COST SAVINGS
    • Total cost of home when constructed:
    • $900k in 2021
HOUSE DESIGN SPECIFICATIONS
    • House Size
    • 180sqm
    • BAL Rating
    • BAL – 29: Increasing levels of ember attack and ignition of debris with a heat flux of up to 29kW/m2
    • Roof
    • Metal (Colorbond)
      Metal (Galvanised)
    • Wall Materials
    • Metal (Colorbond)
      Metal (Galvanised)
    • Window and Door Types
    • Double glazing
    • Number of bedrooms
    • 1
    • Number of bathrooms
    • 1
GARDEN AND WASTE REDUCTION
    • Garden / Outdoors
    • Local indigenous plants
      Native plants
HEALTHY HOME FEATURES
    • Healthy home features
    • Airtight house design
      Natural light and ventilation
Location
Tasman Peninsula TAS 7184
    • Housing Type:
    • Standalone House
    • Project Type:
    • New Build
    • Builder
    • South East Building - Tasmania
    • Designer
    • Ian Weir Architects

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