Gillette High Rise Window Cleaning

What the glass is telling you

Mineral spotting is one of the main conditions to watch for on elevated glass. Wyoming Water Development data for the Gillette Project reports raw water hardness of 1,200 to 2,400 ppm in the Madison Formation supply. If water from that supply contacts the glass, that hardness is relevant because the minerals can leave visible spotting behind as the water dries.

From the ground, spotting can be easy to misread. The viewing angle changes, upper floors catch light differently, and access is limited. We look at where the marks appear and which drops need attention rather than treating the whole elevation as if every pane has the same exposure. A clear picture of the affected glass also helps us decide how the crew can reach it safely.

The access method comes first

A bosun’s chair is a rope-descent system used to reach exterior glass from above. When that is the right approach, we rig from OSHA-compliant roof anchors. The anchor points are independently inspected, and the system includes back-up fall-arrest lines. Those details are not side notes. They are the foundation of the work plan.

A chair is not automatically the right tool just because the windows are high. Some drops make rope descent unsafe or impractical. In those cases, we position an aerial lift instead. Our decision starts with the actual access conditions: whether a workable rope descent can be established, whether the anchor points support that plan, and whether the crew can reach the intended glass without forcing the wrong method onto the building.

Rope work follows the weather

We schedule rope work drop by drop around usable weather windows. Wind can affect one side of a building differently from another, so a calendar date alone does not settle the plan. If the wind is unsafe for a rope drop, we do not put a technician over the edge. The work waits for an appropriate window or moves to a drop that can be handled safely under the conditions.

Freeze risk is also high in Gillette. Routine exterior glass work pauses during hard freezes, which pushes more of the schedule into the shoulder seasons and warmer route months. Spring weather windows here are notoriously narrow and weather-sensitive—the Gillette soil-temperature page notes that cool-season grasses need soil at 2 inches to stay between 50°F and 65°F for several consecutive days just to germinate. We treat our exterior access windows with the same strict attention to local conditions.

When an aerial lift changes the cost

When a bosun’s chair is not safe or practical, an aerial lift crew costs $250 to $500 per hour, with the operator included. Because that is an hourly crew rate, the amount attributable to lift work depends on how many operating hours the job requires. We identify the access method before presenting lift time as though it were a minor add-on.

The important distinction is between the cleaning need and the way the crew reaches it. Two buildings can have similar-looking glass but require different access plans. One may support properly anchored rope descent, while another calls for aerial lift positioning. That choice affects the crew arrangement and, when a lift is used, introduces the stated hourly range. We explain which method applies so the access cost has a clear reason behind it.

Questions to settle before scheduling

Property owners often ask whether every elevation must be handled the same way. No assumption should be made before the access plan is reviewed. Rope descent may be practical for one drop while another requires lift positioning. Weather can also split the work across different windows because we never continue rope operations in unsafe wind.

Another common question is when to reserve the work. Hard freezes interrupt routine exterior cleaning, so shoulder-season and warmer-month routes carry more of the schedule. If you know of specific water contact or recurring mineral spotting from the Madison Formation supply, tell us during scheduling. Those details help us focus on the affected windows and plan the safest practical way to reach them.