The Science BehindInvisible Glass.

Above the 15th floor, traditional squeegee work becomes a liability — wind load, access angle, and dwell time on the glass all change. Water-fed pole systems fed from a ground unit eliminate the need for rope access on mid-rise facades, but they only perform when the feed water is genuinely pure.

On curtain wall systems — the kind you find on Class A towers along Wilshire and in Century City — the panel geometry matters. Unitized curtain wall with flush glazing tolerates a wider brush head than stick-built systems with exposed mullions. We map every facade before we quote it.

Los Angeles municipal water carries 300–500 parts per million of dissolved minerals — calcium, magnesium, silica. When that water evaporates on glass, the minerals stay. On a south-facing tower with full solar exposure, you can see new spotting within 48 hours of a standard wash.

Reverse osmosis followed by deionization brings water to below 10 ppm TDS — ideally 0. At that level, the water is chemically hungry: it wants to grab minerals, not leave them. It pulls residue off the glass and takes it down with the runoff. No surfactants, no squeegee marks, no streaks.

The moment you deploy a crew on a residential high-rise, you are a guest in someone's home. Our phasing protocol starts 90 days before mobilization — building management gets a floor-by-floor schedule, residents get 72-hour and 24-hour notices, and we coordinate with concierge on access windows.

We never work before 7 a.m. or past 5 p.m. on residential floors. We stage equipment in designated zones that don't cross lobby traffic. On the Wilshire Corridor, we've run simultaneous rope access and water-fed pole operations on the same tower using a split-zone approach — rope crew on the north face while WFP handles the podium south glass.