To reduce construction waste generation and to reuse and recycle debris.
Reduce total construction waste or divert from landfills and incinerators a large proportion of the waste generated from new construction. Use the tables below to calculate the percentage of waste avoided or recycled. Exclude excavated soil, land-clearing debris from calculations. Include materials destined for alternative daily cover (ADC) in the calculations as waste (not diversion). Any waste-to-energy is not considered recycling for this credit.
Table 1. Baseline waste for LEED reference home
|Bedrooms||Conditioned floor area (sf)||Waste (lbs)|
|8 or more||—||Area (sf) * 4.2|
Table 1a. Baseline waste for LEED reference home
|Bedrooms||Conditioned floor area (sq. m)||Waste (kg)|
|8 or more||—||Area (sq. m) * 20.5|
For multifamily buildings, use the project’s floor area for any non-unit spaces, and add it to the floor area of the LEED reference home calculated for each unit.
Calculate the waste generated by the project according to the following equation:
Project construction waste = Total waste - (Recycled waste * 0.25)
To convert volume to weight, assume 500 pounds per cubic yard (296 kg per cubic meter) of mixed construction waste, or use Table 2 to calculate the weights of specific waste products.
Table 2. Volume-to-weight conversion for construction and demolition debris
|Aluminum (scrap, whole)||175||0.09||11.1||103.8|
|Brick (common hard)||3,024||1.5||0.67||1794|
|Carpet & Padding (loose)||84||0.04||25||50|
|Dirt (loose, dry)||1,890||0.94||1.1||1121.2|
|Mixed C&D Debris||900||0.45||2.2||533.9|
|Roofing (wood shake, shingle)||435||0.22||4.5||258|
|Tree Limbs & Stumps||1,080||0.54||1.9||640.7|
|Wood (scrap, loose)||330||0.17||5.9||195.7|
|Yard Trimmings (mixed)||108||0.05||20||64|
Source: Contra Costa Waste Authority
Table 3. Points for reducing construction waste below baseline
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