Target Zero Waste Home Construction€¦ · Sample Photos: Leading Sustainable Innovation ... Elimination of cornices and use of square set finish for plaster work eliminated cornice

Leading Sustainable Innovation Leading Sustainable Innovation

Target Zero Waste Home Construction

Leading Sustainable Innovation

Project Objective

How close to a zero waste to land fill construction is possible?


Project Strategy

This project is focused on avoid & reduce as the key drivers.


48.90% 26.98%

14.64%

Bricks

Roof Tiles

Plaster board

Project Overview Phase 1

Key Findings

Approx. 9126kg of waste was generated


Project Overview Relative waste (mass kg, construction phase)

204.70 267.24

6925.10

11.73 1336.40

66.99

53.56

Laying of Slab

Framing

Roof & Brick

Rough in

Paint, Tile and Finish

Packaging

Illegal Dumping


Project Overview Sample Photos:


Project Overview - Walkthrough baseline construction to identify potential design opportunities


Project Overview - Completed Baseline Home


Phase 2

Workshop and design a “Target Zero Waste Home” construction


Phase 2

• Reviewed data and causal factors

• Identified material selection opportunities to reduce waste,

• Identified opportunities to reuse waste in current or subsequent builds,

• Identified current available technologies that provide waste minimisation opportunities,

• Identified redesign of construction using material optimisation,


Summary of workshopped waste avoidance strategies

• Reuse of waste materials on site;

• Sandwich panels;

• QA by brick manufactures to tighter tolerances;

• Second-hand bricks (unlikely to meet BCA code);

• Compressed bricks;

• Metal roof;

• Size plaster board to room;

• Concrete polish wet areas in lieu of tiles;

• Polystyrene & render;

• Hebel panel;

• Design options that use materials efficiently


Summary of workshopped agreed strategies

• Metal Roof ;

• Cement bricks using off cuts and in façade under render;

• Plaster board ordered to room sizes;

• Utilise square set plaster work in lieu of cornice;

• Order exact waffle pods to suite slab layout;

• Reuse temp timber bracing as noggins;

• Select tile size to minimise off cuts;

• Replace internal wall tiles with splash solid backs;

• Cutting schedule to minimise waste on eves;

• Eliminate plaster bulk head from kitchen;

• Install full length wardrobes


Phase 3 &4

Construct a “Target Zero Waste Home” construction

Gather learning's


Slab


Framing


Roofing


Bricks


Plaster


Bulk bags used for recycling


Bulk bags used for recycling


Internal Fix


Non Recyclable Materials


0.0 Cement Sheeting

0.0 Concete

379.1 Timber

837.6 Bricks & Mortar

0.0 Tiles Roof

213.7 Tiles Interior

172.3 Metals

766.9 Plaster Board

32.3 Plastics

0.3 Insulation & Sarking

65.4 Carboard

9.1Polystyrene

8.4 Carpet & Underlay 38.1 Illegal Dumping &

Waste

Contribution of Waste Material (kg)


Reused

Recycled

Landfill

Waste by Fate


Comparison of waste generation by Material

0.0

500.0

1000.0

1500.0

2000.0

2500.0

3000.0

3500.0

4000.0

4500.0

5000.0

54.4

31.0

267.

2

4463

.0

2462

.1

189.

5

34.5

1336

.4

51.1

9.6

27.6

139.

2

8.9

51.6

0.0

0.0

379.

1 837.

6

0.0 21

3.7

172.

3

766.

9

32.3

0.3

65.4

9.1

8.4

38.1

Basline Construction

Demonstration Home


Comparison of Greenhouse Gas Contributions

194.

7

252.

2

7010

.8

1336

.4

213.

4

118.

5

123.

2

315.

2

867.

3

778.

9

302.

8

135.

8

0.0

1000.0

2000.0

3000.0

4000.0

5000.0

6000.0

7000.0

8000.0

Slab Framing Roof and brick

Plasterwork Rough-in and fit-out

Various

Waste generated(kg) Initial house

Final house


Key Achievements No site clean was required until completion of build

Pre-cut metal roofing exceeded expectation

Delivery of sand in jumbo bags eliminated sand run-off to drains, quantity required and were used to sort material for recycling

Polystyrene pods where ordered and installed according to plan with only one pod remaining and 2 x bags

Generally most contractors segregated materials well, although regular resorting of material was required.

Substitution of materials provided the greatest gain in reduction of waste Site cut material was used on the development in parkland development

Concrete bricks work very well with little to no rejects

Use of half bricks in sills reduced brick waste significantly

Almost the entire frame bracing materials was used as noggins, spacers or bracing in final structure Elimination of cornices and use of square set finish for plaster work eliminated cornice waste


Challenges

Room on site restricted external building works and made segregation difficult at times, causing double handling

Contractors did not always sort material into categories, requiring resorting through all phases

Some sectors of the supply chain did not adapt to lean/accurate delivery quantities

Supply chain internal communication challenges caused over delivery and not to specification, ie: frame supplier delivered noggins and bulkheads, brick supplier over delivered by four pallets these were not accepted on site and returned to the supplier for restocking

Internal communications with supply installer did not always run smoothly, ie: plaster ordered to room size but contractors, fixed plaster as normal causing extra waste

Not all surplus or waste material was able to be reused or recycled


The Final Result

Project Target was 80% deviation from landfill

72% of the total construction waste diverted from landfill was achieved via avoidance strategies in comparison to the baseline home.

Total quantity of construction waste that was diverted from landfill compared to the baseline home was 99%


Final Stages of the Demonstration Home


Questions?

Documents

Target Zero Waste Home Construction€¦ · Sample Photos: Leading Sustainable Innovation ... Elimination of cornices and use of square set finish for plaster work eliminated cornice