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Response time
Typically 2–3 business days. For urgent issues, add "URGENT" in your subject line.
Common questions answered
Why does my result differ from the store's estimate?
Our calculators use standard formulas. Results are estimates — always add 10% for waste, settling, and irregular shapes. Confirm with your supplier before ordering.
Are your price estimates accurate?
Prices reflect US national averages, updated each spring and fall. Local prices vary 20–40%. Call 2–3 local suppliers for quotes.
Can I use your content on my website?
Short quotes with attribution are fine. Full article reproduction requires written permission. See our Terms of Service.