Hydroblasting, also known as power washing, is a technique used for cleaning surfaces like concrete, metal, stone, etc. Highly pressurized water is sprayed onto the surface through a specialized power washer to remove dirt, mold, paint, or chewing gum residue. When done correctly, it efficiently cleans without damaging the underlying surface. However, improper hydroblasting can lead to permanent damage. Here are the main dos, don’ts, and dangers to keep in mind with hydroblasting.
The Dos Of Hydroblasting
Wear Protective Gear
Always wear suitable protective equipment when hydroblasting. This includes eye goggles, face shields, rubber gloves, boots, and raincoats. The high-pressure water jets can damage eyes and tear through the skin if handled carelessly.
Clean Surfaces Thoroughly
Before starting, clean excess loose debris off the surfaces manually. This prevents the debris from turning into dangerous projectiles when hit with high-pressure water. Any remaining debris left on the surface can be eliminated with the hydroblasting process itself.
Work Methodically
Start hydroblasting from the top and methodically work your way down in linear paths. Hold the spray nozzle perpendicular and at a consistent distance from the surface. Maintain an even motion to ensure no areas are missed or over-treated.
Rinse Properly
After completion, rinse off the surface properly with normal pressurized water to remove any chemical/detergent residue. Also, clear surrounding areas like landscaping that may have been sprayed accidentally.
The Don’ts Of Hydroblasting
Avoid Electrical Areas
Never point the high-pressure hydroblasting wand toward any electrical installations, wiring, or utility lines. Any water seeping into live electricals can cause dangerous shocks and electrocution hazards.
Don’t Use on Delicate Surfaces
Avoid using hydroblasting on delicate surfaces like wood, vinyl, fiber cement, etc. that can get damaged by the high-pressure water. Also refrain from using it on painted surfaces, as it can strip the paint entirely.
Don’t Work Overhead
Hydroblasting overhead surfaces like roofs is risky, as water dripping down can cause injuries/slips. It is safer to clean from top to bottom to avoid working directly overhead. Use scaffolding walkboards if unavoidable.
The Dangers Of Hydroblasting
Injuries
Improper control of the high-pressure wand can lead to injuries, like severed fingers if pointed at hands. The heavy wand also has risks of causing back strains and repetitive stress injuries due to continuous forceful motions.
Property Damage
Hydroblasting delicate materials too aggressively can damage the surface being cleaned. Using excessive pressure or holding the wand too close can even cut through surfaces like wood, roof tiles, etc. causing costly damage.
Fall Hazards
The equipment is difficult to control on elevated surfaces like ladders and scaffolds. Losing control of the wand’s backslash or getting wet/slippery conditions can result in dangerous falls.
Environmental Contamination
Improperly disposing of wastewater from hydroblasting into storm drains or vegetation can leach out toxic detergents/chemicals. This causes environmental contamination and pollution.
Mesothelioma Risks
Hydroblasting older buildings risks spraying out asbestos fibers from underlying insulation/construction materials. Inhaling asbestos particles can cause mesothelioma and other long-term health conditions.
