South Florida Weather
Why Do Windows Look Dirty After It Rains?
By Solpath Window Detailing · Published · Updated
Windows look dirty after rain because raindrops carry dust and pollen from the air and wash grime down from the frame and sill above the glass. When the drops dry, they leave all of it behind as spots. Clean glass with clean frames sheds rain far better than dirty glass, which is why a full detail lasts longer than a quick wash of the pane.
Where the spots come from
- Dust and pollen the rain picks up on the way down
- Grime washed off the frame, the sill and the wall above
- Salt already sitting on the glass, dissolved and redeposited
- Splash-back from dirty screens, sills and planters
Why the whole window matters
Wash the glass but leave the frame, and the first storm carries the frame dirt straight down the pane. That is why the frames, sills, screens and tracks are part of a proper detail rather than extras. The glass stays clean longer when nothing above it is dirty.
Summer storms in particular
South Florida afternoon storms are short and heavy, and the sun comes straight back out. Drops dry in minutes, before they can run off, and that is what leaves the spotting. A slow winter drizzle does far less.
Helping glass shed water
On recurring plans, RainBlock is applied to eligible glass to help water bead and roll off rather than sit and dry. It does not make a window storm-proof, but it helps reduce visible spotting between visits.
