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Have feedback on our calculators, want to request a new tool, or need to report an error? We value contractor and DIY feedback.

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Response Time

We respond to all verified inquiries within 24 to 48 business hours.

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Tool Requests

Have a proprietary construction formula you'd like us to build? Send us your specs!

Direct Contractor & Engineering Support

All formula corrections and density inquiries are reviewed by trade specialists against ASTM C33 & IRC building codes.

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