How to Keep Retaining Walls and Stone Hardscapes Looking Brand New in Spokane

When homeowners in Spokane Valley and the surrounding areas design their yards, they often invest heavily in hardscaping. Whether it’s a stacked rock retaining wall, a custom flagstone patio, brick walkways, or decorative stone pillars, hardscapes add incredible structure, character, and property value to a yard.

However, because stone and brick are porous and sit right at ground level, they face a constant barrage of moisture, dirt, and organic growth.

Why Hardscapes Lose Their Color Over Time

If you look closely at stone walls or brick pavers that have been sitting outside through a few Pacific Northwest winters, you'll notice they start to look dull, dark, and chalky. Here is why:

• Efflorescence (The White Mineral Powder): You might notice a white, powdery haze pushing through brick or concrete blocks. This is efflorescence—soluble salts carried to the surface by moisture as it evaporates through the masonry.

• Lichens, Moss, and Black Mold: Shady retaining walls hold onto moisture, allowing stubborn black lichens and green moss to embed themselves directly into the textured face of the stone.

• Mud and Soil Splatter: Every time it rains hard, dirt splashes up from the surrounding flower beds, staining the bottom rows of your retaining walls a dingy brown.

The Danger of DIY Pressure Washing on Brick and Stone

It’s tempting to grab a high-pressure nozzle and blast the grime away, but doing this incorrectly can ruin your hardscapes:

• Destroying Mortar Joints: High pressure will easily blast right through aged mortar, crumbling the joints between your bricks or stone blocks and destabilizing the wall.

• Etched Concrete Pavers: Using too much pressure or holding the nozzle too close to manufactured concrete pavers strips away the top protective layer, exposing the rough aggregate underneath and making them fade faster.

The Professional Cleaning Method

Properly restoring stone and brick requires a balanced approach—combining specialized eco-friendly masonry cleaners that break down organic growth and efflorescence, followed by controlled, low-pressure rinsing that cleans the pores without damaging the structural integrity of the mortar.

Protect Your Hardscape Investment

Don't let mildew and mineral buildup ruin the custom stonework you invested in. Keep your entire yard looking crisp, clean, and well-maintained from top to bottom.

Call or text Blast Bros at (509) 362-3034 today for a fast, free hardscape and retaining wall cleaning quote in the Spokane area!