Editorial policy

What we publish, how we check it, and what we refuse to do.

Every page must earn its place

• Each page solves a defined user problem and contains at least one original component: a working calculation, a usable tool, a decision table, a sourced dataset, or a practical procedure.
• We do not publish pages just because a keyword exists, and we do not mass-produce thin variants of the same query.
• We do not copy, lightly reword, translate, or stitch together competitors' pages as the value of a page.

Accuracy & sourcing

• Formulas are standard and citable; see methodology.
• Absorption coefficients are sourced and published as a downloadable dataset.
• We never fabricate statistics, quotes, credentials, first-hand tests, customer stories, authors, or reviews.
• Tool outputs are labelled as planning estimates, with their assumptions stated.

Originality & media

• Diagrams and illustrations are original SVGs generated by the project, or properly licensed images with attribution stored.
• We do not download arbitrary search-result images.

Anti-spam & distribution

• We grow through organic search, genuinely useful resources, and relevant community participation through the owner's real accounts — never bots, fake profiles, automated commenting, purchased links, or unsolicited bulk outreach.
• We use no misleading titles, false scarcity, fake reviews, cloaking, or doorway pages.

Corrections

We fix errors promptly and note material changes. Report issues via the contact on the About page.