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Contact

Use one public contact path for estimate issues, corrections, and business questions.

This site keeps the contact route simple. The inbox below is meant for estimate problems, content corrections, and business inquiries that relate directly to the calculators or guides.

Email [email protected] Correction policy

What to send

Messages are easier to triage when they match one of these buckets.

Estimate issue

Use this when an input, formula, unit conversion, or rounded quantity looks wrong.

Content correction

Use this when a guide, example, or methodology note should be updated for accuracy or clarity.

Partnership or business inquiry

Use this for licensing, data, sponsorship, or other business conversations related to the site.

Response expectations

This site prefers plain expectations over an artificial support promise.

  • Messages are reviewed as part of the site's current launch and maintenance workflow.
  • Response timing can vary during preview and rollout work, so this page does not promise a fixed SLA.
  • If a reported issue changes estimate quality, the correction path is handled through the Editorial & Estimate Policy.

Report an issue with an estimate

For calculation problems, these details usually shorten the investigation the most.

  1. The page URL and the calculator or guide name.
  2. The exact inputs you used, including units.
  3. The result you saw and the result you expected.
  4. Any product label, bag size, coverage spec, or supplier note that explains the mismatch.

Related pages

These pages explain how the site uses messages and how estimate corrections are handled.

Privacy Policy See how messages, analytics, and basic usage data may be handled. Terms of Use See the usage expectations and the no-warranty boundary for calculators and guides. Editorial & Estimate Policy See how defaults, updates, and reported corrections are reviewed.