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Material — terracotta tile evidence record

albedo0.355
emissivity0.9
thermal_conductivity0.81
specific_heat840
materialsCIBSE 2015

Parameters

Names follow the SUEWS YAML specification; click one for its definition in the configuration reference.

Labelled fields override the record-level citation or scope; unlabelled fields use the record metadata.

albedo0.355 CIBSE 2015 source bounds 0.31–0.4 · active within
emissivity0.9 CIBSE 2015 source bounds 0.85–0.95 · active within
thermal_conductivity0.81
specific_heat840
density1700

Provenance evidence

Awaiting sign-off

Published value · assessed by provenance-audit · 2026-08-25. Agent assessment is evidence preparation, not human verification.

Guide A: Environmental designParameter source

Applies to: parameters.thermal_conductivity, parameters.specific_heat, parameters.density

Where: Table 3.37, tile, terracotta row, p. 3-41

Publishes density 1700 kg m-3, thermal conductivity 0.81 W m-1 K-1 and specific heat 840 J kg-1 K-1.

Guide A: Environmental designParameter source

Applies to: parameters.albedo, parameters.emissivity

Where: Table 3.40, red or brown clay tile row, p. 3-45

Publishes absorptivity 0.60-0.69 and emissivity 0.85-0.95. The complementary albedo interval is 0.31-0.40; stored albedo 0.355 and emissivity 0.90 are within the intervals.

SUEWS database pre-migration workbook: database.xlsxLater compilation

Where: Pre-migration Spartacus Material row 36248203

Stores the same tuple under MAPSECC Ref 90240069; the root spreadsheet contains the same row, excluding YAML migration as the cause of the attribution.

Assessment findings

Namesupported
Guide A names tile, terracotta; the retained display name differs only in word order.
Targetsupported
The source tables and historical catalogue describe thermophysical and radiative material properties.
Valuessupported
Table 3.37 publishes the exact thermal tuple. Table 3.40 supports the stored radiative values either directly, by exact absorptivity complement or as a scalar within a published range.
Sourcesupported
CIBSE Guide A is the source for the thermal tuple and radiative evidence. Canonical field-level metadata distinguishes direct publication, exact calculation and a retained scalar selected within a range.
issue #869
Placenot applicable
The generic material row makes no observation-place claim.
Representativenessnot applicable
The generic material row makes no site, city or regional evidence-reach claim.
Methodsupported
Literature is the record-level method for directly adopted values. Canonical overrides record the exceptional leaves as follows: albedo assumed within 0.31-0.4; emissivity assumed within 0.85-0.95.
Identitysupported
Legacy ID 36248203 identifies the retained catalogue row; correcting its source and field-level method metadata does not change the stable path, values or material identity.

Scientific note

This correction changes provenance metadata only. The source ranges and any absorptivity-to-albedo complement are explicit, so the active scalar is not presented as an exact printed value. The material is unlinked from any current construction record. The stable record path remains unchanged because paths are database identities, not citations.

Model-ready fragment

Paste under material in a SUEWS YAML configuration; every value carries its citation.

albedo:
  value: 0.355
  ref:
    ID: cibse2015
    DOI: null
    desc: 'source bounds 0.31–0.4 (active: within)'
emissivity:
  value: 0.9
  ref:
    ID: cibse2015
    DOI: null
    desc: 'source bounds 0.85–0.95 (active: within)'
thermal_conductivity:
  value: 0.81
  ref:
    ID: cibse2015
    DOI: null
    desc: null
specific_heat:
  value: 840
  ref:
    ID: cibse2015
    DOI: null
    desc: null
density:
  value: 1700
  ref:
    ID: cibse2015
    DOI: null
    desc: null

Evidence review

Awaiting sign-offSign off evidence on GitHub

Raises a prefilled sign-off issue. CI accepts it only when the issue author is in the verifier registry and the evidence revision is still current.

Review procedure

Record metadata

Targetmaterial
Schema2026.5 · legacy row 36248203
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