5 Common Pressure Washing Mistakes Homeowners Make (Central Valley Edition)
Pressure washing seems simple — until something goes wrong.
Every week, homeowners across Lodi, Stockton, Manteca, Modesto, Elk Grove, Valley Springs, Angels Camp, and Jackson call professionals to fix problems caused by DIY pressure washing mistakes.
Here are the 5 most common mistakes Central Valley homeowners make — and how to avoid them.
1. Using Too Much Pressure
Too much pressure can:
Etch concrete
Strip paint
Damage stucco
Break siding
Crack window seals
Destroy screens
Leave permanent wand lines
Older homes in Stockton, Modesto, Valley Springs, and Angels Camp are especially at risk.
2. Using the Wrong Nozzle
The wrong nozzle can cut through wood or leave permanent marks.
Zero-degree or red-tip nozzles should never be used on siding, stucco, fencing, or decking.
3. Spraying Upward Into Siding
This forces water behind siding panels, causing:
Mold
Rot
Water damage
Wall swelling
This is a common DIY mistake in homes with vinyl or older siding in Lodi, Manteca, and Elk Grove.
4. Using Harsh Chemicals
Bleach and store-bought cleaners can:
Kill plants
Damage paint
Stain concrete
Burn grass
Harm pets
Professionals use eco-safe detergents designed for exterior surfaces.
5. Not Understanding Surface Differences
Different materials require different pressures:
Stucco → soft wash
Vinyl → low pressure
Concrete → medium-high pressure
Wood → very low pressure
Roof → soft wash ONLY
Homeowners often use one “universal” pressure setting — which leads to damage.
Conclusion
DIY pressure washing may save money upfront, but one mistake can cause hundreds — even thousands — in damage. If you want your home cleaned correctly and safely, hiring a professional is always the best choice.
