Terms of Use

Last reviewed: November 3, 2026. By using MaterialRaft, you agree to use its information and calculators as general-purpose project planning tools.

Estimates, not installation instructions

MaterialRaft provides approximate material quantities based on values you enter. They are not structural or engineering advice, a contractor quote, a design certification, a product warranty, or a guarantee of real-world material requirements. Results may vary due to geometry, packaging tolerances, cutting patterns, waste, moisture, coverage, and other factors.

Before you purchase or install

Check all measurements, manufacturer instructions, product specifications, usable coverage per container, substrate suitability, safety requirements, and applicable local rules. Consider independent advice from a qualified installer, supplier, or licensed professional for complex or high-stakes projects.

Responsible use

You may use the free calculators for personal or business project planning. Do not attempt to compromise the site, interfere with other users, harvest private data, or misrepresent MaterialRaft's content as professionally certified project advice.

Editorial corrections

We aim to explain each estimate clearly, but errors or outdated product information may occur. We may correct and update formulas, examples, pages or tools. If you find an error, contact materialraft@gmail.com and describe the inputs and calculation.

External references

Some guides refer to external manufacturers or associations for installation and product facts. References are informational and do not mean those organizations sponsor or endorse MaterialRaft. Third-party content and terms remain the responsibility of those sites.

Privacy and advertising

See our privacy policy for information on calculator data handling, cookies and advertising technology.

Changes and contact

We may update these terms as the services change. The current version will be posted here. Send questions to materialraft@gmail.com.