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Contact
Write to this address and a person will read it. The most useful thing you can send is a correction.
What to write about
A wrong figure. Every constant on this site has a source and a date, so a wrong figure usually means we misread the source or it has changed. Either way, we fix it on the page.
- A price that has moved since the date shown on the page.
- A coverage or density figure that disagrees with your supplier's data sheet.
- A code requirement that your building department applies differently.
- A calculator that gives a wrong answer for inputs you can describe.
Privacy requests
If you have written to us and want that correspondence removed, or want to know what we hold, say so in writing and it will be handled. The Privacy Policy sets out what is collected and what is not.
What this address is not
It is not a supplier, a contractor, or an emergency line. CalcMule publishes calculators; it does not quote, schedule, or carry out any work.
If you need a price, ask your supplier or a local contractor directly. If the work is urgent or hazardous, contact a qualified professional.