Conceptual illustration, not a real property or measured drawing.
Conceptual illustration. The patio does not establish measurements or actual job evidence.Two distinct pricing jobs.
The gutter guide separates run length, guard treatment and downspouts. The pressure guide compares area-based revenue with a declared time-and-cost scenario. Neither supplies universal rates or a safe working method.
Review the assumptions
A checklist for this page
- Start with the type of job.
- Read the complete worked example.
- Carry your own numbers into the matching tool.
Guides: questions
Do these guides replace the calculators?
No. They explain decisions about scope and assumptions; the linked tools calculate the figures you enter.
Are the articles local price surveys?
No. They contain illustrative arithmetic and clearly identified sources, not representative regional averages.
Sources and evidence limits
- WashTally formula and scenario register v1.0.0
Declared arithmetic and explicitly hypothetical scenarios checked by automated tests. No trade certification or representative market rates.
Record checked:
A source record or passing arithmetic test does not establish a universal rate, professional review, property assessment or guaranteed outcome.