Contact

Email [email protected]. I read every message and reply as soon as I can. There's no phone line or contact form, so your details stay in your own inbox and ours.

• Spotted a wrong figure? Tell me the page and what you expected. I'll check it against the source, fix it and note the change.
• Want a calculator we don't have? Tell me the job, and I'll look at adding it.
• Privacy request? Put "Privacy" in the subject line (see the Privacy policy).

I can't advise on a specific job or check a quote. For that, talk to a licensed local contractor or your local building department.