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Forty-one technical reports, eighteen field notes, the cleaned station datasets and the Ψ-value tables. All released under a Creative Commons Attribution 4.0 licence — use them in a specification, a lecture or a report, with credit.
Report 41 · 2026
Twelve buildings in Winnipeg and Thompson, instrumented before insulation was installed. Interface moisture content, spring drying rates, and the two assemblies that did not recover between winters.
PDF · 4.1 MB
68 pages
Report 40 · 2025
Guarded hot-box and calibrated infrared results, compared against the Ψ-values commonly assumed in energy modelling. Includes dimensioned drawings for every detail tested.
PDF · 6.8 MB
112 pages
Dataset 09 · 2026
Temperature, relative humidity and wood moisture content at four depths for 187 assemblies, with quality flags, sensor metadata and a documented cleaning pipeline.
CSV + Parquet
2.7 GB
Field note 18 · 2025
Six crews, one building, three consecutive mornings, and the correction factors that matter when testing well below the temperature range anticipated by the standard.
PDF · 1.2 MB
8 pages
Guidance 06 · 2026 · draft
Proposed revision to the ratio rule based on fourteen years of measured interface temperatures. Open for comment until 30 October 2026; a response form is included at the back.
PDF · 2.3 MB
41 pages
Report 39 · 2025
Median, quartile and tail values from 412 tested buildings by completion period and construction type, with guidance on setting a project target that a builder can actually hit.
PDF · 3.4 MB
54 pages
Dataset 08 · 2025
Measured linear transmittance for 34 details, with the modelling assumptions, test conditions and DWG drawings for each case.
CSV + DWG
184 MB
Field note 17 · 2024
Thermographic evidence from eleven northern Manitoba row houses showing where the heat leaving the assembly actually comes from, and which of the usual fixes changed nothing.
PDF · 2.0 MB
14 pages
Guidance 05 · 2024
Sensor selection, depths, placement, cable routing, calibration and metadata requirements. Written so that another organisation can replicate the network and produce comparable data.
PDF · 5.1 MB
96 pages
Governance · 2026
Revenue by source, program spending, the funding-transparency declaration, board minutes summary and the conflict-of-interest register.
PDF · 1.8 MB
36 pages
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Reports, field notes, guidance and datasets are licensed CC BY 4.0. Cite as: Ofivoll Envelope Institute, [title], Winnipeg, [year]. Detail drawings may be adapted for project use provided the source and the test conditions are noted. See the open data licence for the full terms, or ask the library if you need an older edition.