Contact

ExactMaterials is reached by email, and only by email. Write to hello@exactmaterials.com and the message goes to Liviu Iulian Taune, who builds and maintains the site and reads every message that arrives.

If that link does not open a mail program on your device, copy the address from here: hello@exactmaterials.com. Replies usually take two to three working days. There is no ticket system and no autoresponder, so the reply you get is written to you.

What to write about

• A number that looks wrong. This is the most useful message you can send. Say which calculator, what you entered, what it returned and what you expected. Coverage figures and stock sizes vary by region and manufacturers change their products, so a correction that arrives with a source — a data sheet, an installation sheet, a label — is the quickest to check, and the page’s updated date moves when the fix goes in.
• A question about a calculation. If a result surprises you, send the inputs, or simply the address from your browser bar: the calculator keeps what you typed in it. The reply walks through how the number was reached — the area, the waste allowance and which figure the calculator used, and the rounding up to whole boxes, bags or sheets.
• A calculator that is missing. Describe the job, the units the material is bought in, and the part that is hard to estimate.
• A pattern the layout engine does not handle. If you lay something that is not on the list — a Versailles pattern, a pinwheel, a running bond at a non-standard offset — describe it and it may end up supported.
• Prices that are out of date. The default prices are reviewed every three months and were last set on 2026-09-13. If what you paid is well off what the calculator shows, that is worth knowing.
• Press and research. If you are writing about renovation and want to quote a figure from the site, ask first and say where it will appear. The reply will tell you whether the number comes from a manufacturer, a published standard or this site’s own estimate, because they are not the same kind of number.

What this is not

I cannot quote your job, recommend a contractor in your area, settle a dispute with an installer, or advise on whether something meets your local building code. Those questions need someone who can see the work, and that is your local building department or a licensed contractor.

Guest posts, link exchanges and paid placements are declined without exception, so please do not send them.