Preservative-treated Scots pine sapwood reaches the intended service life in EN 335 use class 3 exposure.

Under review — the register is reading the literature and will publish a conclusion once directional evidence has been indexed.

In plain terms

17 studies are indexed, but only 0 have been classified for or against — too few to state a consensus, so no share is calculated yet.

This sentence is generated from the same numbers shown below — consensus share, confidence band and the number of indexed studies. Open any section to see exactly how it was reached.

Version 6 · WI-EV v1.0.0 · last swept 2026-08-29

Evidence Score

0–100, rule-based

Confidence

Low confidence

Too few, too old or too conflicting sources to specify from.

Consensus

Not yet calculated

0 support · 0 contradict · 17 unclassified · 0 directionally assessed

Studies

1983–2021

Confidence is limited most by volume of evidence (0/30).

Behind the answer

All of the data, one click away.

Nothing here is hidden — it is folded, so the answer stays readable. Open any section to see exactly how the numbers were produced.

How the score is built6 weighted components, 12/100 total

Volume of evidence

0 directional studies, weighted by grade.

0/30

Study quality

Mean evidence grade 22/100 across the pool.

6/25

Agreement

Not scored: only 0 directional studies (3 needed).

0/20

Peer review

41% published in peer-reviewed venues.

4/10

Recency

Median publication year 2002.

1/10

Reproducibility

18% resolvable by DOI and independently checkable.

1/5

Where the literature disagreesNo direct contradictions in the indexed pool

No direct contradictions in the indexed pool. That is not the same as agreement — it can also mean too few directional studies have been published to disagree yet.

How the consensus moved over timeConsensus recomputed using only the evidence published up to each year

Year	Published	Cumulative	Consensus
1983	1	1	0%
1984	1	2	0%
1992	1	3	0%
2001	2	5	0%
2002	1	6	0%
2010	2	8	0%
2016	1	9	0%
2019	1	10	0%
2021	1	11	0%

Revision history6 published revisions

v61 new study indexed, Evidence Score +1 to 12.2026-08-15 · score 12 · 0%
v51 new study indexed.2026-08-14 · score 11 · 0%
v41 new study indexed, Evidence Score -1 to 11.2026-08-09 · score 11 · 0%
v3Evidence Score -20 to 12.2026-08-08 · score 12 · 0%
v214 new studies indexed, Evidence Score +32 to 32.2026-08-08 · score 32 · 0%
v214 new studies indexed, Evidence Score +32 to 32.2026-08-08 · score 32 · 0%

Every indexed record17 studies with stance, grade and citation count

Biological durability of wood and wood-based products�� Determination of emissions from preservative treated wood to the environment�� Wooden commodities exposed in Use Class 3 (Not covered, not in contact with the ground)�� Semi-field method

doi:10.3403/30483000u

Specifies an environmental emissions method for use class 3 commodities rather than measuring service life.

Neutral

Grade D · 0 citations

Not peer-reviewed

Durability of wood and wood-based products. Determination of emissions from preservative treated wood to the environment. Wooden commodities exposed in Use Class 3 (Not covered, not in contact with the ground). Semi-field method

doi:10.3403/30337079u

Describes an emissions test for treated wood in use class 3, not achieved service life.

Neutral

Grade D · 0 citations

Not peer-reviewed

doi:10.3403/30286933u

Describes an emissions test for treated wood in use class 3, not achieved service life.

Neutral

Grade D · 0 citations

Not peer-reviewed

doi:10.3403/30337079

Describes an emissions test for treated wood in use class 3, not achieved service life.

Neutral

Grade D · 0 citations

Not peer-reviewed

doi:10.3403/30286933

Describes an emissions test for treated wood in use class 3, not achieved service life.

Neutral

Grade D · 0 citations

Not peer-reviewed

doi:10.3403/30483000

Specifies an environmental emissions method for use class 3 commodities rather than measuring service life.

Neutral

Grade D · 0 citations

Not peer-reviewed

Estimating the Service Life of Timber Structures Concerning Risk and Influence of Fungal Decay—A Review of Existing Theory and Modelling Approaches

Philip Bester van Niekerk, Christian Brischke, Jonas Niklewski · 2021 · Forests · doi:10.3390/f12050588

The review discusses general timber service-life modelling without testing treated Scots pine sapwood in use class 3.

Neutral

Grade B · 26 citations

Peer-reviewed

Guidelines for the selection and use of pressure-treated wood

Stan Lebow, Juliet Tang, Grant T. Kirker et al. · 2019 · doi:10.2737/fpl-gtr-275

Provides general pressure-treated wood guidance without establishing Scots pine service life under use class 3 exposure.

Neutral

Grade D · 6 citations

Not peer-reviewed

Above ground Microbial Decay Test of Biocide Treated and Untreated Wood Exposed to Danish and Humid Tropical Climates

A. Wong, N. Morsing, K. Henriksen et al. · 2016

The title indicates above-ground decay testing but reports no service-life outcome for treated Scots pine sapwood.

Neutral

Grade D · 6 citations

Not peer-reviewed

Distribution of blue stain in untreated and DMDHEU treated Scots pine sapwood panels after six years of outdoor weathering

Stergios Adamopoulos, Yanjun Xie, Holger Militz · 2010 · European Journal of Wood and Wood Products · doi:10.1007/s00107-010-0472-4

Six-year outdoor exposure assessed blue stain but did not establish whether treated Scots pine achieved intended EN 335 use class 3 service life.

Neutral

Grade C · 0 citations

Peer-reviewed

A proposed accelerated field stake test for rapid assessment of wood preservative systems

Tor P. Schultz, Darrel D. Nicholas · 2010 · Holzforschung · doi:10.1515/hf.2010.071

Compares preservative efficacy in an accelerated ground-contact test, not Scots pine performance in use class 3.

Neutral

Grade C · 8 citations

Peer-reviewed

Primer blocking and pre-service adhesion of acrylic coating systems applied to light organic solvent preservative (LOSP) treated radiata pine sapwood boards

B. S. W. Dawson, H. W. Kroese, S.-O. Hong · 2002 · Holz als Roh- und Werkstoff · doi:10.1007/s00107-002-0294-0

Tests acrylic coating adhesion on LOSP-treated radiata pine, not Scots pine durability or service life.

Neutral

Grade D · 0 citations

Peer-reviewed

Pre-service adhesion of coating systems based on alkyd primer applied to light organic solvent preservative (LOSP) treated radiata pine sapwood boards

Bernard S. W. Dawson, Hank W. Kroese, Sung-Ok Hong · 2001 · Holz als Roh- und Werkstoff · doi:10.1007/s00107-001-0254-0

Tests coating adhesion on LOSP-treated radiata pine, not Scots pine service life in use class 3.

Neutral

Grade D · 1 citations

Peer-reviewed

Characterisation of solvent components in light organic solvent preservative (LOSP) treated pine sapwood boards

Hank W. Kroese, Bernard S. W. Dawson, Robert A. Franich · 2001 · Holz als Roh- und Werkstoff · doi:10.1007/s001070050477

Characterises solvent components in LOSP-treated pine sapwood without measuring durability or service life.

Neutral

Grade D · 2 citations

Peer-reviewed

Service life of treated and untreated Black Hills ponderosa pine fenceposts

Donald C. Markstrom, Lee R. Gjovik · 1992 · doi:10.2737/rm-rp-300

Reports 30-year performance of treated ponderosa pine fenceposts, a different species and ground-contact exposure.

Neutral

Grade D · 0 citations

Not peer-reviewed

Marine exposure of preservative-treated small wood panels

B. R. Johnson, D. I. Gutzmer · 1984 · doi:10.2737/fpl-rn-248

Marine exposure differs from EN 335 use class 3 conditions and no service-life outcome is stated.

Neutral

Grade D · 2 citations

Not peer-reviewed

Correlation between Exposure Years and Deterioration on the Basis of Field Test Stakes Treated with Oil-Borne Preservative

Yoshiaki NAKAMURA · 1983 · Journal of the Society of Materials Science, Japan · doi:10.2472/jsms.32.929

The field trial used half-buried stakes under ground-contact exposure, not identified Scots pine sapwood in use class 3.

Neutral

Grade D · 0 citations

Peer-reviewed

Stance classification is automated and reviewed against each record's own abstract; it is a reading of the literature, not a measurement. The Evidence Score is a rule-based function of indexed metadata under method WI-EV v1.0.0 and does not constitute proof of the statement.

Cite this claim

Citable, versioned, machine-readable.

Each claim keeps a permanent URL and a version number. Cite the version you read — earlier conclusions stay visible in the revision history above.

APA

WoodIntel. (2026). Preservative-treated Scots pine sapwood reaches the intended service life in EN 335 use class 3 exposure. (Evidence Engine WI-EV v1.0.0, claim version 6). Retrieved 2026-08-30, from https://woodintel.io/evidence/preservative-treated-pine-use-class-3

BibTeX

@misc{woodintel_preservative_treated_pine_use_class_3_2026,
  title  = {Preservative-treated Scots pine sapwood reaches the intended service life in EN 335 use class 3 exposure.},
  author = {{WoodIntel}},
  year   = {2026},
  note   = {Evidence Engine WI-EV v1.0.0, claim version 6, accessed 2026-08-30},
  url    = {https://woodintel.io/evidence/preservative-treated-pine-use-class-3}
}

Open API

curl https://woodintel.io/api/public/v1/evidence?claim=preservative-treated-pine-use-class-3

Returns the score, the indexed studies with stance and grade, the contradictions, the timeline and the full revision history. Open under CC BY 4.0 — API documentation.