Evidence and wording
We distinguish planning footprints from official installation drawings. Court pages identify the source, edition, access date and measurement convention used.
Calculators
Inputs, formulas or decision rules and limitations remain visible. Calculations run locally in the browser and are not stored or transmitted.
Product references
A calculator may link to the exact product page whose published area coverage or direct-linear system claim and container format drive a worked example. Direct-linear claims are not converted to m²/L or silently rescaled by line width. The links provide calculation traceability, not endorsement, compatibility approval or a claim of physical testing. This site has no checkout, commission tracking, quote request or lead form.
Corrections
Rules, source pages and product data change. Users should follow the latest official publication and current technical data. Material changes are reviewed against the versioned source record.