20° south broome house

CB01Case Study 20° South

Broome Houseby Casey Brown Architecture

E : [email protected]

www.creativespacesaustralia.com.au

Creative Spaces Australia

01

CREATIVE SPACES CB01 / 20° SOUTH BROOME HOUSE CASEY BROWN ARCHITECTURE

The design of this 3 bedroom house seeks to continue the

successful tradition of tropical design established in northern

Australia particularly in the early houses of Broome in WA. Its

distinct character is achieved through a vernacular style well

suited to the tropical climate.

This design is a progressive environmental solution, incorporating

the lifestyle needs of the 21st century. Aesthetically the

building’s form and materials are architecturally conceived with

an appreciation of traditional timeless features. Its plan while

thoroughly modern has built-in " exibility for a variety of

occupants and locations.

The vernacular verandah concept has been expanded to form

a cruciform plan creating an indoor / outdoor central kitchen

based on the concept of the external Asian kitchen. Only sleeping

areas are enclosed with the focus being the internal courtyards,

verandah and garden.

Introduction

02


- Open plan kitchen

- Walk-in pantry

- Living / Dining

- Open / enclosed verandah

- 2 garden courtyards

- 3 bedrooms

- 2 bathrooms

- Separate laundry

- Carport

- Rain water tanks

- Solar hot water

- Solar electric system

Standard Features:

Tropical

Subtropical

15

20

25

30

35

40

RecommendedClimate Zones:

130m2

90m2

Enclosed building space

Covered verandah / decks

Areas:

$562,000

EstimatedConstruction Cost:

Note: Indicative construction cost in Australian dollars only. Purchase of land and document package not included. Refer to price description for details.

Exterior View

Recommended lot size

Minimum lot width

Minimum lot length

Lot Size:

>560m2

16m

35m

03


Plan

Fridge

Laundry

Linen

Oven

Pantry

Robe

Rain water tank

Storage

Washing machine

Safe room

F

LDRY

LN

OV

P

R

RWT

ST

W

S

Legend:

Covered / shaded

space

Internal space

Wet areas

Storage

GARDEN

COURTYARD

GARDEN

COURTYARD

KITCHEN

P/S DININGBATH

ENCLOSED

VERANDAH

LIVING2.8 x 4.0m

M BED2.8 x 4.0m

ST R

REAR

GARDEN

ST

ST ST

OV

F

WRWT RWT

RWT RWT

LDRY BATH

RR ENTRY

STREET

CARPORT

BED 2.8 x 4.0mBED 2.8 x 4.0m

N

0 2 51

04


Elevation

East

05


Elevations

South

West

North

06


Interior Views

01

02

Key Plan

02

01

07


Environmental Control

The design of plan and section maximise natural ventilation.

Open ceiling spaces encourage the movement of air. The roof

rises to the centre and incorporates louvres to allow warm air to

escape through convection. Cool air is being drawn in from the

shaded courts and under " oor areas.

The house is elevated o# the ground to keep the building dry

and free of damp.

Landscaping is a vital part of the design. It creates a visual

intersetion in the heart of the house and is an important shading

device.

The elevations are characterised by adjustable $ ns, screens and

louvres. They provide privacy, security and keep insects out.

Covered / shaded

verandah

Wind is funnelled

through the central

courtyards

Covered / shaded

carport

Breezeway

Wind catchers

08


Energy Management

The building’s design combines passive solar features with active

solar devices to minimise energy consumption.

Wide eaves and shutters to the north, east and west protect

openings from direct sunshine. The cruciform con" guration of

the plan opens the house up to prevailing winds to naturally

ventilate each space.

Projecting " ns to the facades capture cool breezes from

the shaded garden courtyards. The central high ridge takes

advantage of convection venting removing any hot air from the

house.

Enclosed rooms can be mechanically air conditioned if desired.

Living areas are orientated to the north and west to bene" t from

the winter sunshine.

* Photovoltaic panels can be integrated on the northern slope

of the roof, with a potential production of up to 4 kWh using 16

panels of 1650 x 1000mm photovoltaic panels.

** All hot water will be solar heated with collectors on the

northern roof and tanks located under the # oor. Both PV and

solar hot water systems take advantage of the 18 degree roof

pitch, the optimum for solar collection in tropical/sub tropical

latitudes.

Photovoltaic panels on

north facing roof above *

Solar hot water system on

north facing roof above**

LED lighting system

throughout

Energy e$ cient

appliances

Photovoltaic Panels

Solar hot-water system

09


Fire sprinklers

(Bush" re protection)

Rain water stored from

house roofs x 4

Water reduction taps/

toilets (3-star minimum)

Water e# cient washing

machine

Underground rain water

tank

Rain water tank (14,000L)

Rain water tank (3,500L)

Rain water

Cold water

Hot water

Water Management

Courtyard garden above ground tanks

Underground kitchen tank

Roof catchment area

14,000 L

14,000 L

280m2

Rainwater collected from the roof will be stored in the following

tanks for use in bathrooms, laundry and garden :

Total 28,000 L

10


Substructure

Structure

Roof

Linings

Screens

Floors

External Works

Equipment

Steel posts set in concrete pads with an open

accessible sub-" oor to the building

Highly durable galvanised steel structure

including wall framing (studs), roof rafters

and roof battens

Corrugated zinc-alloy roof sheets.

1/2 round gutters connected up to water

storage tanks.

Small pro# le, zinc-alloy roof sheeting / # bre

cement / timber, inside and outside

Insect and security screens to be heavy

gauge stainless steel woven mesh.

Screens to be # xed to all open walls including

the verandah, between solid walls and

ceilings, behind shutters, # ns and blades.

Wind catchers to be zincalume mini

corrugated cladding on metal frames.

External " oors: recycled hardwood, open

joins with mosquito mesh under

Internal " oors: boards to be laid tight and

sealed with non toxic tongue oil # nish

Tank water storage: corrugated zincalume

Solar hot water system

Photovoltaic panels

Materials have been selected to maximise their longevity and

minimise their maintenance. They can be varied depending

on personal choice, cost and location. The repeated use of the

same modular components throughout the design ensures an

economical building process.

Schedule of materials and ! nishes:

General:

03

01 02

0504

01

02

03

04

05

Legend:

Corrugated roof sheeting

Mini Corrugated cladding

Timber cladding

Timber decking

Fibre cement lining

Materials

11


Estimate Cost Calculations

Trade Amount

Ground works 3,000

Sub Total 3,000

Site Preparations and Early Works

Concrete 12,293

Structural steel work 30,600

Water proo" ng 600

Insulation 6,880

Roof sheeting / Rainwater disposal 31,130

Windows / Glazing 66,275

Doors / Frames 21,205

Carpentry 47,200

Sub Total 216,183

External wall cladding 18,240

Internal wall lining 53,900

Ceiling 23,940

Tiling / Paving -

Painting 9,140

Metal work 8,120

Joinery 17,500

Appliances 3,000

Fixtures / Sanitary wares 5,480

Sub Total 139,320

Building Structure

Electrical installation 11,900

Hydraulic installation 19,750

Rainwater storage tanks 7,900

Solar hot water system 6,150

Solar electric system 6,000

Sub Total 51,700

External works -

Landscaping -

Sub Total -

Building Services

Total cost excl. GST 511,531

GST 10% 51,154

Total cost incl. GST 562,685

Sca# olding 5,000

Preliminaries 12% 49,825

Margin / Overhead 10% 49,503

Sub Total 101,328

Preliminaries/Overheads/Pro! ts

External works / Landscaping

Finishes / Fixtures / Fittings

A" ordability

Note:

Above pricing is current for the year 2014, based on

construction cost in Brisbane, Queensland. However, the

construction cost will vary depending on location, speci" cs of

the site, choice of materials, etc. To obtain an accurate " gure, it

is recommended that a minimum of 2 local quality builders be

asked to tender for your speci" c requirements.

Enclosed Building

Covered Verandah

Total

The clever use of space (making sure the building is not too big

but big enough) allows a compact building design which in turn

ensures building a# ordability.

80m2

90m2

170m2

12


Site Variations

Case study house 01 is designed for near level North to South

blocks. The design can be adapted to suit the speci" cs of the

site, within certain limits. This includes adaptations to gradient

(slope), orientation, access, retained trees, views and adjoining

buildings.

It is recommended that siting is done in consultation with the

architect to ensure optimum solar access, shading and general

consideration of other site features.

Maximum front to back foot print slope to be 5 degrees.

Addition of steps at front and rear depending on slope. Cross

fall of up to 5 degrees can be accommodated in the design.

Sloping Block:

Extra bedroom or home o# ce can be achieved by enclosing

corner of rear verandah.

Addition:

Entry is recommended via South West, South or South East with

North to South orientation option.

Orientation:

Entry

N

NENW

S

Entry

SW SE

5°Entry

Entry5°

20° south broome house

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