Why Is Purified Water Better for Window Washing?

If you’ve ever washed a window with tap water and ended up with streaks or cloudy spots, you’ve already experienced the problem.

So why is purified water better for window washing?

Because purified water removes dirt more effectively and dries completely spot-free — without leaving behind mineral residue.

It’s one of the biggest advancements in modern professional window cleaning.

The Problem with Regular Tap Water

Tap water contains dissolved minerals such as:

• Calcium
• Magnesium
• Iron
• Sodium

When water evaporates from the glass, those minerals remain behind. That’s what causes:

• Streaks
• Hard water spots
• Cloudy haze
• Mineral staining

The harder the water in your area, the worse the spotting can be.

What Is Purified Water?

Purified water used in professional window cleaning has had minerals removed through filtration systems such as reverse osmosis and deionization.

The result is water that is:

• 100% pure
• Free of dissolved solids
• Highly effective at lifting dirt

Because it contains no minerals, it leaves nothing behind when it dries.

Why Purified Water Cleans Better

Pure water behaves differently than tap water.

Since it contains no dissolved solids, purified water naturally seeks out dirt and impurities. When applied to glass, it:

• Attracts and lifts contaminants
• Breaks down grime
• Rinses surfaces thoroughly
• Dries completely clear

This allows windows to dry naturally without hand-drying or wiping.

Safer for Frames and Seals

Mineral-heavy water can leave deposits not just on glass, but on:

• Window frames
• Rubber seals
• Metal hardware

Over time, mineral buildup may contribute to staining or corrosion.

Purified water helps protect the entire window system — not just the glass surface.

Ideal for Multi-Story and Large Properties

Purified water systems are especially effective for:

• Apartment complexes
• Commercial buildings
• High-rise properties
• Homes with hard water

Using water-fed pole systems with purified water allows our skilled technicians to clean windows safely from the ground while achieving a spotless finish.

Fewer Chemicals Required

Because purified water is so effective at lifting dirt on its own, fewer cleaning agents are needed.

This makes the process efficient and surface-safe, especially for exterior cleaning.

Final Answer: Why Is Purified Water Better for Window Washing?

Purified water is better because it removes dirt more effectively and dries completely spot-free without leaving mineral residue behind. It delivers clearer results and protects your windows long-term.

If you want streak-free, professional window cleaning that lasts, purified water makes the difference.

Contact OFF THE WALL today to schedule expert window washing using professional purified water systems.