Pressure washing is the workhorse for outdoor surfaces with accumulated dirt that no regular mopping can remove: industrial grease, graffiti, mold, parking lot pollution, urban-residue facades. But it doesn’t apply to everything. This guide helps you decide when to hire the service and what to demand from the provider.
What is high-pressure pressure washing?
It’s a mechanical process using controlled-pressure water (typically 1500-4000 PSI) to remove dirt adhered to a surface. Industrial machinery is very different from domestic pressure washers: more power, fine pressure and flow regulation, lances and nozzles per type of dirt and surface.
When pressure washing DOES make sense
Parking lots and vehicle traffic zones
Oil stains, tire dust, fuel residues. Periodic pressure washing (every 6-12 months) recovers the floor and prevents dirt from embedding to the point of becoming impossible to remove.
For residential units with basement parking, it’s one of the services that adds the most value vs. residents and the board.
Exterior facades
Facades in bare concrete, brick, microcement or exterior paint accumulate dust, mold, lichen and urban residue. Periodic pressure washing is the only thing that keeps them presentable without needing to repaint.
Applies to corporate buildings, retail, factories and large homes.
Graffiti removal
Graffiti on concrete, brick or exterior paint. Worked with high pressure + specific chemical to not damage the substrate. One of the few methods that removes graffiti without having to repaint the whole wall.
Industrial floors with grease
Production plants, mechanical shops, industrial kitchens. Floors with grease accumulated over months or years. The combination of pressure + hot degreaser is the only way to recover them.
Other useful applications
- Warehouse and loading area cleaning.
- BBQ areas and wet zones in residential units.
- Roof tiles and covers (always from the ground or with certification at height).
- Mold removal on exterior walls.
When pressure washing does NOT make sense
- Soft wood surfaces: pressure lifts it.
- Interior paint: lifts or discolors.
- Old brick with loose mortar: can finish loosening the wall.
- Walking on fragile roof tiles: always work from below or with telescopic system.
- Walls painted with non-exterior paints: stains or chips.
If your provider offers to pressure wash any surface without discrimination, they’re improvising.
What a professional provider must bring
1. Calibrable industrial machinery
Don’t confuse with domestic pressure washer. Industrial regulates pressure per nozzle, has continuous water flow and handles temperature to degrease.
2. Heights-certified staff (when applicable)
For facades over 1.5 meters height, Colombian regulation requires heights work certification (Resolution 1409 of 2012). Staff must be affiliated with ARL class V and use harness, lanyard and lifeline.
3. Full PPE
Glasses, non-slip boots (accumulated water is slippery), gloves, waterproof suit, mask if using chemicals.
4. Water management plan
Dirty water with grease or chemicals can’t go through a storm drain without treatment. For large industrial surfaces controlled collection and environmental disposal is required.
5. Prior assessment
A serious provider does a technical visit before quoting: reviews surface type, dirt level, equipment access and water availability. Blind quotes almost always end in a reopened budget.
Common mistakes
- Working at maximum pressure by default: damages fragile surfaces.
- Not diluting the degreaser correctly: leaves residue that turns sticky.
- Pressure washing during company operating hours: noise and splashing interrupt.
- Not documenting before/after: makes it impossible to prove the result to administration or management.
Pressure washing service in Cali
At Limpio Colombia we operate pressure washing with industrial machinery, heights-certified staff and water management plan when applicable. We serve parking lots, facades, industrial plants, residential units and retail. Coverage: Cali, Yumbo, Jamundí, Palmira and Buga.