target zero waste home construction€¦ · sample photos: leading sustainable innovation ......
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Leading Sustainable Innovation Leading Sustainable Innovation
Target Zero Waste Home Construction
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Project Objective
How close to a zero waste to land fill construction is possible?
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Project Strategy
This project is focused on avoid & reduce as the key drivers.
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48.90% 26.98%
14.64%
Bricks
Roof Tiles
Plaster board
Project Overview Phase 1
Key Findings
Approx. 9126kg of waste was generated
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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
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Project Overview Sample Photos:
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Project Overview - Walkthrough baseline construction to identify potential design opportunities
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Project Overview - Completed Baseline Home
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Phase 2
Workshop and design a “Target Zero Waste Home” construction
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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,
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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
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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
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Phase 3 &4
Construct a “Target Zero Waste Home” construction
Gather learning's
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Slab
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Framing
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Roofing
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Bricks
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Plaster
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Bulk bags used for recycling
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Bulk bags used for recycling
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Internal Fix
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Non Recyclable Materials
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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)
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Reused
Recycled
Landfill
Waste by Fate
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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
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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
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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
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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
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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%
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Final Stages of the Demonstration Home
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Questions?