Power washing is a powerful cleaning tool — but when it comes to windows, power isn’t always a good thing. So, can power washing damage windows? Unfortunately, yes — and it happens more often than people think.
Why Windows Are Vulnerable
While modern windows are designed to withstand wind and weather, they’re not made to handle concentrated jets of high-pressure water. Power washing can:
- Crack or shatter glass
- Break seals and allow moisture between panes
- Damage caulking or window frames
- Force water into the home, leading to interior damage
All it takes is one wrong angle or too much pressure to cause expensive damage.
Factors to Consider
- Window Type: Double-pane and older windows are more vulnerable to seal damage.
- Pressure Settings: Anything over 1,200 PSI near a window is risky — most pros use much lower pressure when working around glass.
- Spray Distance: The closer the nozzle, the greater the risk of breakage.
- Angle & Technique: Direct sprays toward seams or frames can cause leaks or structural issues.
The Safe Approach: Low Pressure or Soft Wash
Professionals know how to clean around windows safely — often using a soft wash system or lower PSI with wide-angle nozzles. If your windows are grimy, it’s best to avoid high-powered DIY cleaning and instead work with a team that knows how to clean without cracking, leaking, or causing lasting damage.
