Terms of Use

Last updated October 31, 2026

Estimates are not quotes

Everything on this site is a planning estimate produced from published pricing data and general assumptions. It is not a quote, an offer, or a professional opinion, and it cannot account for your roof's actual condition, your local market, or site-specific constraints. Always obtain written quotes from licensed contractors before commissioning work.

No professional relationship

Using this site does not create a contractor, engineering, or advisory relationship. RoofCostLab does not refer, recommend or endorse roofing contractors. Structural questions, including load capacity for heavy roofing materials, snow load design and framing adequacy, must be assessed by a qualified structural engineer.

Accuracy

We work hard to keep our data accurate and we document our sources, but material prices and labor rates move constantly and regional variation is large. We make no warranty that any figure is current or correct for your situation, and we are not liable for decisions made in reliance on it.

Acceptable use

You may use our calculators freely for personal and commercial estimating. You may quote our content with attribution and a link. You may not scrape the site at volume, republish our dataset wholesale, or present our figures as your own original research.

How RoofCostLab is funded

RoofCostLab is a free calculator and reference site. Every calculation runs in your browser, and nothing you enter is sent to us or stored. We do not collect, route or sell leads, and there is no quote form or phone line. The site is funded by display advertising through Google AdSense, which starts once our application is approved, and by retailer affiliate links on some material lines. Neither changes a figure our calculators produce.

Affiliate disclosure

Some outbound material links are affiliate links, marked as such, from which we may earn a commission. This does not affect what you pay or what our calculators show.

Contact

Questions about these terms: hello@roofcostlab.com