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Rozak House

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Holly Stockton

on 2 April 2013

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Transcript of Rozak House

Reinforced Concrete Footings
Steel frame: Raised Nortruss Steel frame, Custom Design, Galvanised
Hardwood used for decking slatted (Cyprus pine)
Slate used in kitchen and wet areas.
Walls external: Zinc Alume: reflects heat, fire resistant, termite resistant.
Walls internal: Plywood, glass and wood louvers, flyscreens, steel mesh
Ceiling is zincalume corrugated iron, fiber cement stains sags in Darwin humidity.
Roof corrugated iron Materials were selected to last.
"At least 150 years"
The Rozak House does not achieve
high levels of sustainability through the use of technology but by simple, practical design. Rozak House Materials Reinforced Concrete Footings Steel Frame: Raised steel frame: Galvanised custom design Slatted Hardwood Decking Slate Used in Kitchen &
Bathrooms Some external walls
are Zinc Alume The Bathrooms use perforated corrugated steel for additional ventilation. Other internal wall
panels are plywood Other walls are wooden louvers Steel framed wall External wall cladding Water Usage Rain Water Tanks Roofing material: Custom Orb
Zinc Alume The Rozak House is not connected to the mains
water supply.

Water is all collected and stored on site during the
wet season in the NT The Rozak House Rain Water Details -300 sqm of roof fed into 110,000 liters of tanks.
A typical family will use between 100,000 and 200,000 liters a year as long as they don't water the lawn and shrubs and take care not to waste water. "Darwin can get up to 2 meters of rain a year, providing me with 600,000 liters of water." "Unfortunately, those 2 meters all come within 4-6 months, so I need to save enough water for the rest of the year."
"On the bright side, because I don't have any spare water I can't maintain a lawn or shrubbery. Even if I did have the water I still wouldn't do any landscaping; the water's a good excuse though." No air conditioning

No dishwasher

No dryer

High efficiency
Fluorescent lights

Gas oven and cook
top as solar would
be inefficient 11.5kW (28 BP 75-watt panels) Solahart Thermosiphon
Roof Mounted System; 2.25m 2
Solar hot water system 1/2km from the nearest power cable Lifestyle "To maintain the ambient temperature outside is the best you can do in Darwin. You can't make it any better than that. You certainly can't take the moisture out of the air unless you go to air conditioning."
Adrian Welke, Troppo Architects Passive Solar
Design Elements Zoning Orientation Elevated Platform Daylighting Roof Design/
Shading Rozak House, Northern Territory Troppo
Architects Ventilation Low Thermal Mass Located near Lake Bennet
100 acre area of virgin bushland
80km south of Darwin Photovoltaics Active Systems "Lighting is kept dim... If anyone in the house wants to read they need to plug in a lamp or wait until the sun rises."

"...even fan usage must be rationed..."
Mike Rozak Permeable Envelope Energy 22-29 kWh/day
8200-10619 kWh anually Towards Zero Energy Architecture, New Solar Design. Mary Guzowski, Laurence King Publishing


www.energymadeeasy.gov.au Compared to... 4.5 kWh/day
1643 kWh/year Use "...due to their limited diurnal range ... passive cooling is ... more effective in low mass buildings"

"Thermal comfort during sleeping hours ... primary design consideration."

"Lightweight construction responds quickly to cooling breezes. High mass can completely negate these benefits."

Your Home Technical Manual RAIA National Sustainable Architecture Award, 2002
MBA National Environment and Energy Award, 2003 Climate 2 seasons: Dry - April to October (H 32°C, L 17°C)
Wet - October to March (H 36°C, L 22°C) Monsoons, cyclones, thunderstorms, high humidity Follow the sun or the shade Deep enough living
pavilion to escape... Deep sheltering roof overhangs East to west John White & Holly Stockton Conclusion 2 degrees cooler in the day
but 2 degrees warmer at night Sustainable buildings do not have to be hi-tech. They just have to be appropriately designed for their environment and practical to inhabit.
Houses in Perth and other cities should follow this design. Longlasting Materials are Sustainable Environmental design with standard materials
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