Terms of use
Build-up Atlas is free to use, for study and for work. These are the terms you use it on. In short: it is a design aid, the figures are indicative, and the final design is yours to check.
What you can do
You may use the tool, the guide pages and anything you export from them (images, PDF reports, 3D models, specification text and share links) in your own work, including paid work, coursework and publications. No account or payment is needed. A credit to Build-up Atlas is welcome but not required.
What the figures are
Every figure uses generalised values for typical products and follows published standards and guidance, listed in the tool under Sources. The results are indicative. They are meant for early design, for comparing options and for teaching.
They are not a design, a fire strategy, an energy calculation or a Building Regulations submission. Before relying on a build-up, check each value against the manufacturer's declared data and the current regulations for your project, and have the final design checked by a suitably qualified professional.
No guarantee
The tool is provided as it is. We work to keep it accurate and say when the rules were last checked, but we do not promise that it is free of errors, that it suits your project, or that it will always be available. Regulations and product data change.
Responsibility
You are responsible for the decisions you make using the tool. As far as the law allows, we accept no liability for loss or damage arising from the use of the tool or its results. Nothing in these terms limits liability that cannot be limited by law.
Names and sources
Product and company names appear only as examples of typical products of a type. They belong to their owners, and their appearance here is not an endorsement by them or of them. Systems 01 to 44 follow the list in Modern Construction Envelopes by Andrew Watts.
Your data
See the privacy page. Your saved build-ups stay in your own browser.
Changes and contact
These terms may change as the tool does; the date below shows the current version. Questions: privacy@buildupatlas.co.uk or the feedback form.
Last updated 13 November 2026.