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Removing a Rusted Rooftop Swamp Cooler by Crane and Sealing the Roof Right

October 27, 2026

Retiring old rooftop equipment takes more than lifting a unit off the roof. The goal is to leave the roof better than we found it. On a recent project in San Diego County, that's exactly what our crew did.

Before and after: the rusted swamp cooler on its curb, and the new sheet metal cap and flashing

A swamp cooler past its service life

This evaporative (swamp) cooler had served well past its normal life. Corrosion had set in and it was rusted through. Rather than replace it, the owner chose to decommission it for good.

Rusted-through cabinet and electrical disconnect on the old swamp cooler

Lifting it off with a crane

Our crew brought in a crane and lifted the old unit off the roof. A crane lift keeps the work controlled and avoids dragging heavy, corroded equipment across the roof surface.

Crane lifting the old swamp cooler off the roof

Sealing the old curb

Taking the unit away leaves an opening to deal with. We installed new flashing and a custom sheet metal platform cap over the existing curb, sealing and concealing the old penetration so the roof stays watertight.

A useful upgrade on the water line

While we were up there, we replaced the valve on the water supply line and added a new rooftop hose bib. Now the owner has an easy way to rinse their solar panels as part of routine maintenance.

Why a clean decommission matters

For property owners and facility teams, a properly finished removal means one less piece of aging equipment to maintain, a sealed roof penetration, and a site that's easier to care for going forward. Clean, watertight and done right: that's how we approach every job, big or small.

Precision Air Inc owner next to the finished curb cap

Have old rooftop equipment that needs to go?

Precision Air Inc is a locally owned heating and cooling company serving San Diego County. Call us at (760) 858-8000 or visit precision-ac.com. Office hours are Monday through Friday, 8 to 5.


Need service? Call (760) 858-8000, Monday–Friday 8–5, or send us a message.

Call (760) 858-8000