Yes, house pressure washing is safe if done correctly. Pressure washing is an effective way of removing dirt, grime, algae, and other unwanted debris from exterior surfaces of a home such as stucco, wood siding, and shingles. When used properly, the pressurized water can remove those deep-down layers of dirt without harming or damaging the underlying structure. However if it’s not done correctly there are certain risks involved—the water could be too hard on the surface or damage delicate paint finishes or even get under shingles causing water infiltration that could lead to mold growth or worse. Big thanks to Ottawa Building Services for sharing this answer with us!