We read every message and reply as soon as we can.
What to write to us about
- An error or an outdated number. Tell us which page, what you entered and what looks wrong. If you have a source, such as a code table, a product data sheet or a current price, please include it. We check every report and fix confirmed errors.
- A missing product or material. Send the product name and a link to its data sheet or coverage chart.
- Ideas. New calculators, features or anything that would make the site more useful.
- Press and partnerships. Questions about the site, linking to it or working with us.
What we can't help with
We can't give advice on a specific house, review a project or recommend a contractor. For that, talk to a home energy auditor or a local insulation contractor. Your utility may also offer a free or low-cost home energy audit.
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If you email us, we use your address and message only to reply. See our privacy policy for details, and our about page for who runs the site.