Privacy and cookies
The Shed Insulation Calculator is run by James Dewes. It has no accounts and no sign-up, and the calculations happen in your browser. This page explains what is stored, which outside services are involved, and the choices you have.
What the calculator stores on your device
So your shed is still there when you come back, the calculator saves a few things in your browser's local storage. They stay on your device and are never sent to me.
| Item | What it holds | How long |
|---|---|---|
shed-insulation-calculator:v1 | Your current shed design and settings | Until you clear it or press Reset |
sic:open:… | Which “More options” sections you left open | Until you clear it |
sic:tip-shown | When the tip message was last shown, so it appears at most once every 14 days | Until you clear it |
A shared design link carries the design itself after the # in the address. Browsers do not send that part to the website.
Outside services
- Cloudflare hosts the site. Like any web host it processes your IP address and browser details to deliver the pages and protect the site from abuse. See Cloudflare's privacy policy.
- Google Fonts supplies the typefaces, so your browser contacts Google to download them. See Google's privacy policy.
- Google AdSense shows ads below the calculator. Google and its partners may use cookies to show ads and measure them. Where the law requires it, you are asked first and can say no; non-personalised ads may still use cookies for frequency capping and fraud prevention. See how Google uses information from sites that use its services and change your choices in Google's ad settings.
- PayPal: the tip link takes you to PayPal's own site. Nothing is shared with PayPal unless you choose to tip.
- Share buttons (WhatsApp, Facebook, X, Reddit, Pinterest and email) are plain links. Nothing loads from those services until you click one.
Your choices
- Change or withdraw ad consent at any time with the “Privacy and cookie settings” link that Google's consent message adds to the page.
- Clear the calculator's saved data in your browser's site settings, or use a private window.
- Block cookies in your browser. The calculator still works.
Your rights
Under UK data protection law you can ask what personal data is held about you and ask for it to be corrected or deleted. The calculator itself holds none on its servers. If you have a concern about how your data is handled you can complain to the Information Commissioner's Office.