Decision record · revision 1
A 13.8 ft umbrella
Record demo-adversarial-low-sun-glare:1:umbrella:9:17
A 13.8 feet canopy at about 7.5 feet, tilted toward the low sun.
Baseline
35
Dinner outside · Covered dinner table
Forecast
76
+41 points
Annual average
+16
worst season +0
Survey standing: Mapped: Shade, sky view and daily light are computed from real geometry rather than assumed. This is the rung at which the product starts telling you things you did not already know.
Design intent dimensions
| Height | 7.5 ft |
|---|---|
| Width | 13.8 ft |
Four-season acceptance basis
| Season | Before | After | Delta | Controlling after |
|---|---|---|---|---|
| January | 93 | 93 | +0 | Glare |
| April | 37 | 99 | +62 | Wetness |
| July | 41 | 41 | +0 | What it feels like |
| October | 63 | 65 | +2 | Glare |
The same built change does not produce a dependable improvement across the year.
Site controls this price depends on
| Control | Value | Provenance | Before ordering |
|---|---|---|---|
| House | 14.8 ft high | measured | recorded |
| Deep patio roof | 9.5 ft high; underside 8.5 ft | measured | recorded |
| Covered dinner table | Point at 3.8 ft above ground; facing 270° | measured | recorded |
Verification queue
- Who can actually see in. Sit where you actually sit and look around. Mark the one window or path you can see a person from. Until one exists, privacy is a question we are not answering rather than one that is fine.This is not a refinement. Nothing can answer this question until somebody marks it. · sit-there
Acceptance checks
- Re-run the reading for dinner outside at Covered dinner table after installation and confirm the controlling failure is not worse than the tested proposal.
- Check the completed geometry against the decision record before accepting substitutions: height 7.5 ft, width 13.8 ft.
- Confirm the installed intervention preserves the tested annual behaviour (weak).
- Photograph the completed work from the original reading point and record any change to view, glare, privacy line or usable hours that the model did not predict.
Questions every bid should answer
- How will you verify: A base heavy enough for the local wind, or a fixed socket.?
- Measure the actual height available before ordering: this is sized at 2.3 metres and a hundred millimetres either way changes whether it works.?
- Still unanswered: privacy exposure, noise.?
- What exact product, fixing/anchoring method and maintenance regime is included in the price?
- Which dimensions or assumptions in this record would your proposal change, and why?
- What is excluded from the price: structural design, footing design, drainage, electrical work, planning/permit work, boundary verification or underground-service locating?
Explicit exclusions and professional boundaries
Anchoring and wind rating are the manufacturer's numbers, not ours. A cantilever umbrella in gusty conditions is a real hazard.
This decision record is design intent and decision evidence, not a construction drawing, structural calculation, permit set, boundary survey or setting-out document.
This record does not determine wind or snow loading, foundation or footing geometry, attachment adequacy, drainage works, electrical compliance, buried-service clearance, property lines or required approvals. Those questions remain with qualified people who can inspect the site and selected product.