Can they clean my house without water getting behind the siding?
Wow Wash 360 Team
May 26, 2026 • 3 min read
The Hidden Danger of Water Intrusion
One of the most insidious problems that can occur during a poorly executed house wash is water intrusion. Vinyl siding, Hardie board, and wood lap siding are designed to shed rain that falls naturally from above. They are absolutely not designed to withstand high-pressure water being blasted horizontally or upwards into the seams. When water gets forced behind your siding, it creates a nightmare scenario for homeowners.
What Happens When Water Gets Trapped?
If a careless contractor uses a high-pressure wand on your siding, water is easily forced through the weep holes and overlapping joints. Once trapped between the siding and your home's vapor barrier or wood sheathing, the water has very little airflow to dry out. In the damp climate of the Pacific Northwest, this trapped moisture quickly leads to devastating consequences.
- Toxic black mold and mildew growth inside your wall cavities
- Severe wood rot compromising the structural integrity of the home
- Damage to interior drywall and ruined insulation
How Wow Wash 360 Prevents Water Intrusion
We completely eliminate the risk of water intrusion by strictly adhering to the Soft Wash method for all house washing projects. We never use high pressure on siding. Our specialized, low-pressure pumps apply our eco-friendly cleaning detergents gently to the surface. The chemical does the work of breaking down the dirt and algae, not the force of the water.
Proper Rinsing Techniques Matter
Furthermore, our highly trained technicians know exactly how to rinse a home safely. We always rinse using a high-volume, low-pressure flow, and we ensure the water is directed in a downward angle, mimicking natural rainfall. This guarantees that your siding sheds the water exactly as it was designed to, leaving your home impeccably clean, completely dry inside, and structurally safe.
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