Terms of Use

Last updated: October 2, 2026

Estimates, not professional advice

The calculators give estimates for planning purposes. They are not engineering, architectural or legal advice. Building codes are adopted and amended locally; check with your local building department before construction. Material quantities depend on site conditions, product specifications and waste. Buy according to the manufacturer's instructions.

No warranty

The site is provided "as is", without warranties of any kind. To the extent permitted by law, we are not liable for losses arising from the use of the calculators or content.

Changes

We may update these terms. The date above shows the latest version.