When does the slope-factor method apply?
Use the relationship only where the plan area and uniform pitch describe the same roof plane. Different pitches require separate calculations. If the drawing already supplies true sloped dimensions, multiplying by a slope factor again would overstate the area. Check the source of each measurement and document the assumption in the takeoff.
What does the calculated surface area exclude?
The simple geometric result does not include product laps, cutting loss, special detailing or accessory lengths. It also does not resolve the geometry around every opening or intersection. Measure and review those requirements separately. Keep a purchasing allowance distinct from the net area so a reviewer can see whether the difference comes from geometry or ordering.
How should you use the result in a bid?
Match the checked quantity to the covering specification and the supplier’s sales unit. Review edge and flashing scope, then apply current project-specific rates. Preserve the calculation and drawing reference in your workbook. If the input pitch or dimensions change, revise the area first and then recalculate the purchasing quantities rather than adjusting the final price by eye.
What does CyanBuild software cost?
These are CyanBuild’s published software plans as checked on October 6, 2026. Each allowance is for PDF pages per month. You review the quantities; an outsourced takeoff service is a separate purchase.
| Plan | Monthly price | PDF pages / month |
|---|---|---|
| Free | $0 | 3 |
| Starter | $29 | 30 |
| Pro | $99 | 120 |
| Enterprise | $299 | 400 |
Paid subscriptions renew according to their terms. A page allowance does not guarantee the completeness of a takeoff, and unused capacity does not turn the subscription into a per-project service. Check current features and terms before choosing a plan.
What else should you check?
- Is the 1,118-square-foot result a real project quantity?
- No. It is a rounded result from explicitly assumed dimensions and pitch. It demonstrates arithmetic only and is not suitable as an actual roof order.
- Should every roof area be multiplied by 1.118?
- No. That factor belongs only to the illustrated 6-in-12 uniform pitch. Other geometry requires its own reviewed dimensions and calculation.
- Does this page provide an interactive calculator?
- No. It provides a transparent worked method and links to a downloadable roofing worksheet for your own checked inputs.
Where do the figures and product facts come from?
Sources checked October 6, 2026. Published prices can change; verify the actual terms before purchasing. Worked examples on this page are labeled separately from published product or service facts.
- CyanBuild published plans
Monthly software prices and PDF page allowances. These are product terms, not market averages or outsourced service fees.
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