Report a problem
If an estimate looks wrong, we would rather hear it than not. A result that disagrees with somebody who does this for a living is the most useful thing you can send us.
How to tell us
Email contact@buildbatch.co.uk. Angelos Hallaci, who runs BuildBatch, reads it. What happens to your email is on the privacy page.
What to include
The estimate can usually be reproduced exactly from five things:
- The measurements you entered — length, width, height, and any doors or windows.
- The paint details on screen — coats, coverage per litre, the extra allowance and the tin size. “Change paint details” opens them.
- What it told you, and what you expected instead. If you know the right answer, that is the most valuable line in the message.
- The version at the foot of the page: release 0.14.0, paint formula version 0.1.1.
- Your device and browser, if something looked broken rather than wrong.
“Copy list” puts most of that on your clipboard in one go: the measurements, the assumptions used and the quantities, plus anything the page warned you about. Pasting it is quicker than retyping, and it tells us exactly what you saw.
What happens next
- A problem with an answer is checked against the worked examples and the automated tests. If a calculation is wrong, the fix changes the formula version, is written up in the changelog, and the page tells you the assumptions were reviewed again.
- A problem with using the page — something unclear, unreachable by keyboard, awkward on a phone — is recorded with the user testing notes and fixed in a release.
- A disagreement about an assumption, such as how far a paint really goes or how much to allow for waste, is recorded against that assumption and weighed the next time the assumptions are looked at. No qualified tradesperson has checked the assumptions yet, so a report from somebody who does the work carries real weight.
No promise about how quickly: this is one person's side project, and pretending otherwise would be the first inaccurate thing on the site.
Please do not use this for anything urgent
This is not a safety reporting route and nobody is watching it out of hours. If something on site is dangerous — suspected asbestos in a textured coating, lead paint, a structural worry — stop and get qualified advice. The Health and Safety Executive publishes guidance on both.