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Process Data set: Impregnated timber from Pölkky Oy (en) en

Key Data Set Information
Location FI
Geographical representativeness description FI
Reference year 2025
Name
Impregnated timber from Pölkky Oy
Use advice for data set This EPD covers life cycle stages for impregnated timber from cradle to gate with options, modules C1- C4, and module D. The product phase, transportation to the building site and installation A1-A5 are included as well as the deconstruction, transportation to waste processing and the waste processing C1-C4. Also, the module D, information beyond construction works life cycle, is in the scope. The sys- tem boarders are shown in the figure 2. The production of production equipment and means of transport, as well as the machinery, equipment and production goods needed for production and in production are excluded from the scope of the assessment, as are the commuting of workers. The screws required for the installation are excluded from the model, as their quantity is small. Also, the plastic waste handling, which comes from unwrapping the plastic bands at the construction site, is excluded from the modelling as the amount of plastic waste from 1 m3 timber package is small. The screws and the plastic represent less than 1% from the weight of the product. No other material or energy flows have been excluded from the system boundaries.
Technical purpose of product or process The declaration is made for average impregnated timber manufactured at Pölkky Oy’s production site in Oulu. Impregnated timber is made of responsibly sourced pine (Pinus sylvestris) and spruce (Picea abies). Log procurement and the manufacturing processes at Pölkky Oy are FSC® and PEFC certified.1 Dimensions and lengths of the products varies on a wide range as well as the end use of the product. Impregnated wood is commonly used in outdoor applications, such as decking, fences, playgrounds, and landscaping structures, where durability and resistance to weather, moisture, and pests are es- sential. Moisture content for impregnated timber after the process can be 50–60 %, but the water evaporates in time until the wood reaches equilibrium. The density of treated wood in the end is one to two per- cent higher compared to untreated wood. Impregnated products are mainly class NTR A or NTR AB. Also, UC2 products are produced for UK market. Impregnated timber is mainly made from the planed timber produced at Pölkky Oy’s production sites. Also, a small portion of sawn timber is impregnated annually. Sawn timber is procured from Pölkky Oy’s production facilities as well. Occasionally, a batch of raw material may come from a subcontrac- tor. The treatment is carried out through pressure impregnation in a closed process, where all excess preservatives are collected and reused in the next batch. Planed timber procured from a subcontractor is modelled by the Finnish Sawmill association EPD for the average planed timber in Finland (EPD of Finnish Sawn and planed timber 10.06.2021). Moisture content for impregnated timber right after the process can be 50–60 %, but the water evap- orates in time until the wood reaches equilibrium. The density of treated wood in the end is 1–2 % higher compared to untreated wood. The average density of impregnated timber in the modules A4- A5, C and D is 490 kg/m³ in a moisture content of 20 %.
General comment on data set In Pölkky Oy’s impregnation plant in Oulu, only the impregnation process is carried out separately from other processes, eliminating the need for allocation. Impregnation process doesn’t generate by-prod- ucts either.
Copyright Yes
Owner of data set
Quantitative reference
Reference flow(s)
Biogenic carbon content
  • Carbon content (biogenic): 0.0 kg
  • Carbon content (biogenic) - packaging: 0.0 kg
Time representativeness
Data set valid until 2030
Time representativeness description "2025-08-26" - "2030-08-26"
Technological representativeness

Indicators of life cycle

IndicatorDirectionUnit Production
A1-A3
 Transport
A4
 De-construction
C1
 Transport
C2
 Waste processing
C3
 Disposal
C4
 Recycling Potential
D
Use of renewable primary energy (PERE)
Input
  • 1.98E+3
  • 1.67
  • 0.936
  • 19
  • 0
  • 0
  • 5.88E+3
Use of renewable primary energy resources used as raw materials (PERM)
Input
  • 5.88E+3
  • 0
  • 0
  • 0
  • -5.88E+3
  • 0
  • 0
Total use of renewable primary energy resource (PERT)
Input
  • 7.86E+3
  • 1.67
  • 0.936
  • 19
  • -5.88E+3
  • 0
  • 5.88E+3
Use of non renewable primary energy (PENRE)
Input
  • 1.02E+4
  • 35.5
  • 0.0954
  • 99.9
  • 0
  • 0
  • 0
Use of non renewable primary energy resources used as raw materials (PENRM)
Input
  • 0
  • 0
  • 0
  • 0
  • 0
  • 0
  • 0
Total use of non renewable primary energy resource (PENRT)
Input
  • 1.02E+4
  • 35.5
  • 0.0954
  • 99.9
  • 0
  • 0
  • 0
Use of secondary material (SM)
Input
  • 0
  • 0
  • 0
  • 0
  • 0
  • 0
  • 0
Use of renewable secondary fuels (RSF)
Input
  • 0
  • 0
  • 0
  • 0
  • 0
  • 0
  • 0
Use of non renewable secondary fuels (NRSF)
Input
  • 0
  • 0
  • 0
  • 0
  • 0
  • 0
  • 0
Use of net fresh water (FW)
Input
  • 0.177
  • 0
  • 0
  • 0
  • 0
  • 0
  • 0
Hazardous waste disposed (HWD)
Output
  • 0.133
  • 0
  • 0.5
  • 0
  • 0
  • 0
  • 0
Non hazardous waste dispose (NHWD)
Output
  • 4.69
  • 0
  • 0
  • 0
  • 0
  • 0
  • 0
Radioactive waste disposed (RWD)
Output
  • 0
  • 0
  • 0
  • 0
  • 0
  • 0
  • 0
Components for re-use (CRU)
Output
  • 0
  • 0
  • 0
  • 0
  • 0
  • 0
  • 0
Materials for recycling (MFR)
Output
  • 4.08
  • 0
  • 0
  • 0
  • 0
  • 0
  • 0
Materials for energy recovery (MER)
Output
  • 0
  • 0
  • 0
  • 0
  • 0
  • 0
  • 0
Exported electrical energy (EEE)
Output
  • 7.45
  • 0
  • 0
  • 0
  • 5.88E+3
  • 0
  • 0
Exported thermal energy (EET)
Output
  • 0
  • 0
  • 0
  • 0
  • 0
  • 0
  • 0

IndicatorUnit Production
A1-A3
 Transport
A4
 De-construction
C1
 Transport
C2
 Waste processing
C3
 Disposal
C4
 Recycling Potential
D
Abiotic depletion potential - fossil resources (ADPF)
  • 1.06E+3
  • 119
  • 1.7
  • 253
  • 73.8
  • 1.3
  • -4.99E+3
Abiotic depletion potential - non-fossil resources (ADPE)
  • 0.0000152
  • 1.08E-7
  • 9.6E-10
  • 1.19E-7
  • 0.00000855
  • 1.17E-9
  • -3.88E-8
Acidification potential, Accumulated Exceedance (AP)
  • 0.235
  • 0.0236
  • 0.000515
  • 0.051
  • 0.0837
  • 0.000876
  • -1.06
Depletion potential of the stratospheric ozone layer (ODP)
  • 0.0000074
  • 0.00000179
  • 7.3E-9
  • 0.00000399
  • 6.63E-7
  • 1.67E-8
  • -0.0000032
Eutrophication potential - freshwater (EP-freshwater)
  • 0.0217
  • 0.000761
  • 0.0000415
  • 0.00104
  • 0.0035
  • 0.000398
  • -0.0327
Eutrophication potential - marine (EP-marine)
  • 0.06
  • 0.00438
  • 0.000102
  • 0.0114
  • 0.0429
  • 0.000161
  • -0.112
Eutrophication potential - terrestrial (EP-terrestrial)
  • 0.622
  • 0.0475
  • 0.00104
  • 0.125
  • 0.414
  • 0.00174
  • -0.731
Global Warming Potential - biogenic (GWP-biogenic)
  • -604
  • 0.0315
  • 0.0184
  • 0.0382
  • 731
  • 0.0509
  • 81.7
Global Warming Potential - fossil fuels (GWP-fossil)
  • 91
  • 8.21
  • 0.128
  • 16
  • 7.71
  • 0.0583
  • -375
Global Warming Potential - land use and land use change (GWP-luluc)
  • 0.55
  • 0.00491
  • 0.00118
  • 0.00601
  • 0.0012
  • 0.0000604
  • 0.0483
Global Warming Potential - total (GWP-total)
  • -512
  • 8.25
  • 0.148
  • 16.1
  • 738
  • 0.109
  • -293
  • 92
  • 8.219
  • 0.1296
  • 16.06
  • 7
  • 0.0581
  • -374.7
Photochemical Ozone Creation Potential (POCP)
  • 0.196
  • 0.0184
  • 0.000278
  • 0.0492
  • 0.102
  • 0.000541
  • -0.331
Water (user) deprivation potential (WDP)
  • 4.7
  • 0.0389
  • 0.00677
  • 0.067
  • -0.197
  • 0.00271
  • -8.89

IndicatorUnit Production
A1-A3
 Transport
A4
 De-construction
C1
 Transport
C2
 Waste processing
C3
 Disposal
C4
 Recycling Potential
D
1This impact category deals mainly with the eventual impact of low dose ionizing radiation on human health of the nuclear fuel cycle. It does not consider effects due to possible nuclear accidents, occupational exposure nor due to radioactive waste disposal in underground facilities. Potential ionizing radiation from the soil, from radon and from some construction materials is also not measured by this indicator.
2The results of this environmental impact indicator shall be used with care as the uncertainties on these results are high or as there is limited experiences with the indicator.
Potential Comparative Toxic Unit for ecosystems (ETP-fw) 2
  • 449
  • 108
  • 2.04
  • 204
  • 127
  • 10.6
  • -1.32E+3
Potential Comparative Toxic Unit for humans - cancer effects (HTP-c) 2
  • 1.76E-8
  • 4.28E-9
  • 4.4E-11
  • 5.34E-9
  • 0.00000145
  • 7.5E-11
  • 5.65E-9
Potential Comparative Toxic Unit for humans - non-cancer effects (HTP-nc) 2
  • 4.56E-7
  • 9.1E-8
  • 6.83E-10
  • 2.04E-7
  • 6.98E-7
  • 9.51E-10
  • 1.37E-7
Potential Human exposure efficiency relative to U235 (IRP) 1
  • 9.38
  • 0.682
  • 0.19
  • 1.32
  • 0.176
  • 0.00724
  • 2.61
Potential Soil quality index (SQP) 2
  • 4.15E+4
  • 40.9
  • 1.03
  • 242
  • 9.23
  • 2.28
  • -4.66E+3
Potential incidence of disease due to PM emissions (PM) 2
  • 0.00000249
  • 3.84E-7
  • 2.69E-9
  • 0.0000014
  • 8.65E-7
  • 9.16E-9
  • -8.18E-7