Terms of use
Plain words. Use the tools, check the results, do not sue me over a patio.
Estimates, not quotes
Every result on this site is an estimate produced by arithmetic on numbers you supplied and on figures printed in the public documents cited on the page. It is not a quote, not a bid, not a bill of materials and not engineering advice. Real jobs have subfloors that are not flat, walls that are not square, patterns that waste more, local codes and delivery minimums. Buy from the store, not from this page.
Check the label
Coverage and yield vary between products and between production runs. Every one of those fields on this site is editable for that reason. The number printed on the bag or the carton in front of you beats anything published here.
No warranty
This site is provided as it is, without warranty of any kind. To the extent the law allows, the owner is not liable for any loss arising from use of it, including material bought in the wrong quantity.
Links out
The where to buy links open a search on Google Maps. They are not recommendations, there is no affiliate relationship and no store pays to appear. Manufacturer documents are linked so you can read the source for yourself, and quoting a document is not endorsement in either direction.
Content and ownership
The text, the code and the drawings on this site belong to Ulisses Balbino. Quotations from manufacturer and government documents belong to their publishers and are used, briefly and with attribution, so you can verify a number rather than take it on faith. Product names and trademarks belong to their owners, and this site is not affiliated with, endorsed by or sponsored by any of them.
Changes
These terms can change. The date below moves when they do.
Contact
Last updated 2026-08-23.