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Untreated larch cladding reaches a service life comparable to surface-treated softwood in temperate Northern European climates.

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

In plain terms

39 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 2026-09-18

Evidence Score

26

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 · 39 unclassified · 0 directionally assessed

Studies

39

1990–2026

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, 26/100 total
Volume of evidence

0 directional studies, weighted by grade.

0/30
Study quality

Mean evidence grade 39/100 across the pool.

10/25
Agreement

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

0/20
Peer review

67% published in peer-reviewed venues.

7/10
Recency

Median publication year 2018.

7/10
Reproducibility

49% resolvable by DOI and independently checkable.

2/5
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
YearPublishedCumulativeSupportContradictConsensus
199011000%
200712000%
201024000%
201126000%
201217000%
201329000%
2014211000%
2016112000%
2017113000%
2018922000%
2020123000%
2021528000%
2022129000%
2024332000%
2025234000%
2026236000%
Revision history5 published revisions
  1. v69 new studies indexed, Evidence Score +1 to 26.2026-08-20 · score 26 · 0%
  2. v55 new studies indexed.2026-08-15 · score 25 · 0%
  3. v4Evidence Score -20 to 25.2026-08-08 · score 25 · 0%
  4. v311 new studies indexed, Evidence Score -2 to 45.2026-08-05 · score 45 · 0%
  5. v214 new studies indexed, Evidence Score +47 to 47.2026-08-04 · score 47 · 0%
Every indexed record39 studies with stance, grade and citation count

Neoleucopis freyi

Gaimari, Stephen D., Havill, Nathan P. · 2021 · A new genus of Chamaemyiidae (Diptera: Lauxanioidea) predaceous on Adelgidae (Hemiptera), with a key to chamaemyiid species associated with Pinaceae-feeding Sternorrhyncha, pp. 1-39 in Zootaxa · doi:10.5281/zenodo.5725250

The record describes an insect associated with Japanese larch, not cladding durability or treatment.

Neutral

Grade D · 0 citations

Not peer-reviewed

Wood Modification in Europe

Luigi Todaro, Giacomo Goli, Dick Sandberg et al. · 2020 · Proceedings e report · doi:10.36253/978-88-6453-970-6

The report inventories European wood-modification activity without comparing untreated larch and surface-treated softwood.

Neutral

Grade C · 59 citations

Not peer-reviewed

Biographies

2018 · Service Life Prediction of Polymers and Plastics Exposed to Outdoor Weathering · doi:10.1016/b978-0-323-49776-3.00023-4

This biographies record contains no finding about wood cladding service life.

Neutral

Grade C · 0 citations

Peer-reviewed

Experimental and Derived Approaches to Service Life Prediction Models

Henry K. Hardcastle · 2018 · Service Life Prediction of Polymers and Plastics Exposed to Outdoor Weathering · doi:10.1016/b978-0-323-49776-3.00003-9

The title concerns general outdoor-weathering models for polymers and plastics, not untreated larch cladding or treated softwood.

Neutral

Grade C · 1 citations

Peer-reviewed

Service Life Prediction Series Cumulative Table of Contents

2018 · Service Life Prediction of Polymers and Plastics Exposed to Outdoor Weathering · doi:10.1016/b978-0-323-49776-3.00024-6

This is a cumulative table of contents for a publication about polymers and plastics.

Neutral

Grade C · 0 citations

Peer-reviewed

Copyright

2018 · Service Life Prediction of Polymers and Plastics Exposed to Outdoor Weathering · doi:10.1016/b978-0-323-49776-3.00019-2

This copyright record contains no finding about wood cladding service life.

Neutral

Grade C · 0 citations

Peer-reviewed

The wood from the trees: The use of timber in construction

Michael H. Ramage, Henry C. Burridge, Marta Busse‐Wicher et al. · 2016 · Renewable and Sustainable Energy Reviews · doi:10.1016/j.rser.2016.09.107

The review addresses timber construction and environmental impacts rather than cladding durability.

Neutral

Grade B · 1343 citations

Peer-reviewed

Larches ([i]Larix[/i] sp.). Chapter 2

Luc Pâques, Elena Foffová, Berthold Heinze et al. · 2013 · doi:10.1007/978-94-007-6146-9_2

The chapter discusses larch distribution and ecological problems without evaluating cladding service life.

Neutral

Grade C · 0 citations

Peer-reviewed

Phytophthora in forests and natural ecosystems

Paloma Abad‐Campos, Ana Cristina Coelho, Pilar Fernández‐Rebollo et al. · 2012 · DIGITAL.CSIC (Spanish National Research Council (CSIC))

The work concerns Phytophthora in forests and natural ecosystems rather than building cladding.

Neutral

Grade D · 58 citations

Not peer-reviewed

Studies of wooden cladding materials degradation by spectroscopy

Barun Shankar Gupta, Bjørn Petter Jelle, Hovde Per Jostein et al. · 2011 · Proceedings of the Institution of Civil Engineers - Construction Materials · doi:10.1680/coma.2011.164.6.329

Untreated and CCA-treated claddings underwent weathering in Norway, but no comparative service-life result is stated.

Neutral

Grade C · 10 citations

Peer-reviewed

Physical-Mechanical Properties and Natural Durability of Lesser Used Wood Species from Mozambique

Alexandre Charifo Ali · 2011 · Epsilon Open Archive (Sveriges lantbruksuniversitet biblioteket (Swedish University of Agricultural Sciences))

The title concerns natural durability of lesser-used Mozambican species, not larch cladding in Northern Europe.

Neutral

Grade D · 11 citations

Not 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). Untreated larch cladding reaches a service life comparable to surface-treated softwood in temperate Northern European climates. (Evidence Engine WI-EV v1.0.0, claim version 6). Retrieved 2026-09-18, from https://woodintel.io/evidence/untreated-larch-service-life
BibTeX
@misc{woodintel_untreated_larch_service_life_2026,
  title  = {Untreated larch cladding reaches a service life comparable to surface-treated softwood in temperate Northern European climates.},
  author = {{WoodIntel}},
  year   = {2026},
  note   = {Evidence Engine WI-EV v1.0.0, claim version 6, accessed 2026-09-18},
  url    = {https://woodintel.io/evidence/untreated-larch-service-life}
}
Open API
curl https://woodintel.io/api/public/v1/evidence?claim=untreated-larch-service-life

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.