Using the tools
Effective October 1, 2026. The calculators and guides provide general material-planning information. Use them only within their stated assumptions, and verify quantities with the actual product documentation and site plans before ordering. You are responsible for the measurements and prices you enter.
No construction approval or professional engagement
The site does not establish a professional engineering, contractor or advisory relationship. Outputs are not stamped drawings, permit determinations, construction instructions, quotations or guarantees of structural adequacy. Read the engineering disclaimer before using a result for a real project.
You must comply with relevant local rules and obtain appropriate professional advice. A calculator result does not establish whether a wall is safe, permitted or suitable for a particular location.
Acceptable use and shared projects
Do not use the contact form for spam, unlawful content, harassment, malware or attempts to access the private database. Do not attempt to disrupt the site or misrepresent its output as a professional approval.
You may copy or print a takeoff for your project and share project links. Do not claim the calculator’s content as your original work, copy the entire website for resale or imply an endorsement that has not been given.
Availability and limitations
We aim to keep the tools useful but do not guarantee uninterrupted availability, error-free output or fitness for a particular project. Errors, product differences and site conditions can affect an estimate. To the extent permitted by applicable law, use is at your own risk.
Nothing in these terms excludes rights or liabilities that cannot lawfully be excluded. These terms may be updated when the service changes; the effective date will identify the current version. Use the contact form for questions or correction requests.