Privacy Policy

Last updated August 16, 2026

The short version

Our calculators run entirely in your browser. The dimensions you enter are never transmitted to us or stored anywhere. We have no accounts, no logins, and we do not sell personal information.

What we collect

• Calculator inputs: nothing. All math executes locally in your browser and the values never leave your device.
• Analytics: aggregate page-view data such as pages visited, approximate region, referrer and device type. This is not linked to an identifiable person.
• Email: only if you write to us, and only to reply.

Cookies and advertising

We use Google AdSense to display advertising. Google and its partners may use cookies or device identifiers to serve ads based on your prior visits to this and other websites. You can opt out of personalised advertising at Google Ads Settings, or opt out of third-party vendor cookies at aboutads.info/choices.

Google's use of advertising cookies enables it and its partners to serve ads to you based on your visit to this site and other sites on the internet. See How Google uses information from sites that use its services.

Affiliate links

Some material links on project pages are affiliate links. If you buy through one, we may earn a commission at no additional cost to you, and the retailer may set its own cookie. Affiliate relationships never influence the prices our calculators produce.

Your rights

If you are in the EEA, UK or California you have rights of access, correction and deletion over personal data we hold. Because we hold almost none, having no accounts and storing no calculator inputs, such a request is usually satisfied by deleting any email correspondence. Write to hello@roofcostlab.com.

Children

This site is not directed at children under 13 and we do not knowingly collect their data.

Changes

Material changes to this policy will be reflected in the date above.