About

Corrections

A reference site that never records a correction is not a careful reference site. It is one that is not checking.

On this page (4 sections)
  1. What we correct and how
  2. How to report an error
  3. Correction log
  4. Standing notes

Short answer

Substantive errors are corrected on the page and logged here with the date and what changed. Typographic fixes are not logged. We do not silently alter published figures.

What we correct and how#

Substantive corrections are changes to a dimension, a source attribution, a code reference or a conclusion. These are made on the page and logged below with the date, the page and what changed.

Clarifications are changes that do not alter a figure but remove an ambiguity. They are logged when the original wording could reasonably have misled someone.

Typographic and formatting fixes are made without a log entry.

We do not remove a page because it turned out to be wrong. We fix it and record the fix.

How to report an error#

Send us the page URL, the figure you believe is wrong, and, if you have one, the source that supports the correct figure. A source is not required: "the arithmetic in the third table does not add up" is a perfectly good report and one of the most useful we receive. See contact.

Reports about a figure being different in your jurisdiction are welcome and usually result in a note being added rather than a figure being changed, because local amendment is the normal state of building codes rather than an exception.

Correction log#

No substantive corrections have been logged yet. This site published in September 2026; entries will appear here as they are made, newest first. An empty log this early is a statement about the site's age, not about its infallibility.

Standing notes#

These are not corrections, but they are places where readers reasonably expect a single answer and there is not one.

  • Code minimums versus planning guidelines. Where the two differ, both appear. Neither is an error.
  • Mattress sizes across markets. US, UK and EU size names do not map onto each other. A UK king is smaller than a US queen. Pages give the centimetres.
  • Published furniture dimensions. Manufacturers measure inconsistently, particularly around cushion overhang, handles and appliance doors. Where a figure could plausibly be measured two ways, the page says which.
  • Local amendments. Model code figures on this site are the model code. Your jurisdiction may differ, and checking is on you.