Environmental Product Declaration

TimberTech Composite Decking

Environmental Product Declaration (EPD) for TimberTech Composite Decking, manufactured by The AZEK Company. Declaration SmartEPD-2025-070-0491-01, prepared according to UL Part B: Flooring, valid until June 12, 2030.

Download the EPD (PDF)

Functional unit: 1 m2 installed flooring of product
Valid until: June 12, 2030
PCR: UL Part B: Flooring

Declaration details

Manufacturer: The AZEK Company
Program operator: Smart EPD
Declaration number: SmartEPD-2025-070-0491-01
Date of issue: June 12, 2025
Valid until: June 12, 2030
Product category rules (PCR): UL Part B: Flooring (version 2)
Standard: ISO 14025:2006 and ISO 21930:2017
Functional unit: 1 m2 installed flooring of product
System boundary: Cradle to grave (A1 - A3, A4, A5, B1 - B7, C1 - C4, D)
Product specificity: Product Specific
Manufacturing specificity: Manufacturer Average
Manufacturing plants: AZEK Building Products (894 Prairie Rd, Wilmington, OH 45177, United States); AZEK Company (1001 E Gowen Rd, Boise, ID 83716, United States)
Product service life: 27.3 years
Verifier: Lucas Pedro Berman, Senda - Consultoria Ambiental & Energetica
LCA software: Sphera LCA for Experts (formerly GaBi) 10.9
Program instructions: Smart EPD General Program Instructions v.2.0, March 2025

Life cycle assessment results

Results per 1 m2 installed flooring of product.

Environmental Impact Assessment Results

Indicator	Unit	A1-A3	A4	A5	B2	B4	C2	C4
GWP-total	kg CO2 eq	1.26e+1	1.20e+0	8.27e-1	7.82e-1	2.97e+1	1.91e-1	8.63e-1
ODP	kg CFC 11 eq	5.81e-11	3.52e-13	6.46e-12	6.28e-14	1.20e-10	5.32e-14	1.55e-12
AP	kg SO2 eq	4.30e-2	4.83e-3	4.86e-3	2.99e-3	1.08e-1	8.03e-4	3.40e-3
EP	kg N eq	2.91e-2	4.45e-3	9.48e-4	1.02e-3	6.81e-2	7.43e-4	1.53e-3
POCP	kg O3 eq	7.66e-1	1.11e-1	3.26e-2	3.61e-2	1.82e+0	1.84e-2	4.97e-2
ADP-fossil	MJ	2.18e+2	1.59e+1	8.58e+0	2.13e+1	4.92e+2	2.40e+0	7.47e+0

Resource Use Indicators

Indicator	Unit	A1-A3	A4	A5	B2	B4	C2	C4
PERE	MJ, net calorific value	4.47e+1	6.66e-1	2.45e+0	7.11e-1	8.94e+1	1.01e-1	1.09e+0
PERM	MJ, net calorific value	1.75e+2	0	0	0	3.15e+2	0	0
PERT	MJ, net calorific value	2.19e+2	6.66e-1	2.45e+0	7.11e-1	4.04e+2	1.01e-1	1.09e+0
PENRE	MJ, net calorific value	2.11e+2	1.60e+1	9.37e+0	2.21e+1	4.84e+2	2.42e+0	7.71e+0
PENRM	MJ, net calorific value	1.45e+2	0	0	0	2.62e+2	0	0
PENRT	MJ, net calorific value	3.56e+2	1.60e+1	9.37e+0	2.21e+1	7.45e+2	2.42e+0	7.71e+0
SM	kg	1.17e+1	0	0	0	2.10e+1	0	0
RSF	MJ, net calorific value	0	0	0	0	0	0	0
NRSF	MJ, net calorific value	0	0	0	0	0	0	0
RE	MJ	0	0	0	0	0	0	0
FW	m3	9.19e-2	7.18e-4	3.57e-3	7.26e-2	3.06e-1	1.09e-4	8.79e-4

Waste and Output Flow Indicators

Indicator	Unit	A1-A3	A4	A5	B2	B4	C2	C4
HWD	kg	0	0	0	0	0	0	0
NHWD	kg	3.00e-1	0	0	0	4.48e+1	0	2.46e+1
HLRW	kg	5.73e-5	6.53e-8	2.86e-7	4.73e-7	1.05e-4	9.87e-9	9.64e-8
ILLRW	kg	4.92e-2	5.49e-5	2.78e-4	3.13e-4	8.99e-2	8.30e-6	8.47e-5
CRU	kg	0	0	0	0	0	0	0
MFR	kg	1.60e-4	0	1.37e-2	0	2.49e-2	0	0
MER	kg	0	0	0	0	0	0	0

Carbon Emissions and Removals

Indicator	Unit	A1-A3	A5	B4	C4
BCRP	kg CO2	1.82e+1	0	3.27e+1	0
BCEP	kg CO2	0	9.08e-1	3.27e+1	1.72e+1
BCRK	kg CO2	6.04e-1	0	1.09e+0	0
BCEK	kg CO2	0	6.04e-1	1.09e+0	0
BCEW	kg CO2	0	0	0	0
CCE	kg CO2	0	0	0	0
CCR	kg CO2	0	0	0	0
CWNR	kg CO2	0	0	0	0

ND = not declared. Life cycle modules: A1-A3 product stage, A4-A5 construction process, B use stage, C end of life, D benefits and loads beyond the system boundary.

Material composition

Product composition
Material/Component Category	Origin	% Mass
Recycled Wood Flour		43
Recycled Polyethylene		27
Talc		10
Other Materials		20

Packaging
Packaging material	Origin	Mass (kg)
Corner Boards		1.17E-01
Dunnage		3.16E-01
Plywood Shets		8.18E-02
Unit Covers		2.34E-02
Banding		1.17E-02

Biogenic carbon
Biogenic carbon content	kg C per m2 installed flooring
Biogenic carbon content in product	50.8
Biogenic carbon content in accompanying packaging	1.69

Hazardous substances

No regulated hazardous or dangerous substances are included in this product.

Scenarios

Transport to the building site (A4)

Fuel type: Diesel
Vehicle type: Truck
Transport distance: 800 km
Capacity utilization: 75%
Packaging mass: 35.07 kg

End of life (C1-C4)

Collected with mixed construction waste: 2.29E+01
Landfill: 2.29E+01

Benefits and loads beyond the system boundary (D)

Recycled content of product: 27.6%

Product description

TimberTech composite decking board is manufactured primarily from recycled polyethylene and wood flour (sawdust).

TimberTech composite decking comes in two profile versions, i.e., full and scalloped, as shown here in the product composition diagram. The full profile is covered by a 30-year manufacturer warranty and the scalloped profile by a 25-year manufacturer warranty. With the full-profile decking representing 46% of annual production output (by mass) and the scalloped-profile decking making up the remaining 54%, a production-weighted average composite decking product would carry a theoretical warranty of 27.3 years.

Interpretation

The primary driver of the individual environmental burdens is consistently the replacement of the decking over ESL of 75 years. Replacements accounts for 64% of total contribution across all the impact indicators. Raw Materials (A1) and Transport (A2) have a high contribution across most indicators. For GWP, Raw Materials (A1) contribute 14% burden, while Transport (A2) and Manufacturing (A3) show 7% and 5% burden respectively. Raw Material is the second most dominant stage for most impact indicators with 14% burden for AP, 12% for EP, 17% for ADPf and 11% for SFP. Transport (A2) contributes to AP by 8%, SFP and EP by 12%. Installation (A5) of decking product contributes 5% to the ODP and 4% to AP indicator, whereas Disposal (C4) contributes around 1% to 2% for all indicators.

LCIA results are relative expressions and do not predict impacts on category endpoints, the exceeding of thresholds, safety margins or risks. EPDs are comparable only when they follow the same PCR, functional unit and system boundary. The full EPD (PDF) contains the methodology, scenario assumptions and verification statement.