The wind rule is the same. Everything about acting on it is harder thirty feet up.
Bring it in earlier, not later
Over 25 miles per hour in the forecast means bring it down. On a roof, add margin, because the job you are about to do involves a person, a ladder or hatch, and a large object in rising wind.
Decide the night before wherever possible. A rooftop take-down in an arriving storm is the worst version of this task.
Retrieval when it goes wrong
A balloon that breaks free at ground level lands somewhere. One that breaks free on a roof frequently wraps around plant, ducting or a parapet first.
That is a bad afternoon and occasionally a damaged balloon. It is also entirely preventable by acting on the forecast rather than the window.
Snow and ice
Bring it down ahead of wet snow, not during. Accumulation on the envelope or the line is the awkward case, and a frozen balloon must not be folded.
If you need to box it in freezing weather, bring it inside and let it come up to temperature first. Polyurethane tolerates cold; it does not tolerate being folded while frozen.
The sign ordinance still applies
Rooftop signage is often treated differently and sometimes more strictly than ground signage in local ordinances.
Check with your city before a permanent install. The FAA side is straightforward — below 150 feet they are not involved and we fly at 120 — but the local rules are the ones that vary.
More at arizonaballoon.com.