Professional pressure washing restores curb appeal, protects surfaces, and extends the life of concrete, stone, siding, and decks. At K&M Steam Cleaning, we provide expert pressure washing in Austin, using commercial-grade hot-water systems and surface cleaners to safely remove grime, algae, and stains from residential and commercial properties.
This glossary covers the essential terms, techniques, and tools used in professional pressure washing so you can understand what goes into a spotless, long-lasting clean.
A
Algae Removal: Eliminating green or black organic growth from siding, stone, or concrete using detergents and soft wash techniques.
Angle Nozzle: A nozzle tip that sprays water at a fixed angle (typically 15°, 25°, or 40°) to control pressure and coverage.
Aggregate Surface: Exposed stone concrete that requires moderate pressure and uniform cleaning to avoid etching.
B
Bleach Solution: A diluted sodium hypochlorite mix used to kill mold and mildew during soft washing.
Brick Cleaning: Gentle washing process that removes dirt and algae from brick without damaging mortar.
Biodegradable Detergent: Environmentally safe cleaning solution used to break down grease and soil during washing.
C
Cold-Water Pressure Washer: A pressure washer that uses unheated water for cleaning surfaces with lighter soil.
Chemical Injection: The process of introducing detergent or sanitizer into the water stream during washing.
Concrete Sealing: Applying a protective layer after cleaning to resist stains, oil, and moisture penetration.
D
Degreaser: A cleaning agent that breaks down oil, grease, and automotive fluids from driveways and garage floors.
Detergent Ratio: The concentration of cleaning solution mixed with water for optimal performance.
Downstream Injection: Chemical mixing method where detergent is injected after the pump to protect equipment.
E
Efflorescence: White, powdery deposits of salt that appear on masonry and can be removed with specialized cleaners.
Etching: Surface damage caused by using excessive pressure or harsh chemicals; prevented with proper technique.
Eco-Friendly Wash: A cleaning process using biodegradable, low-VOC products safe for landscaping and pets.
F
Fan Nozzle: A spray tip producing a wide fan pattern, ideal for even cleaning of siding and driveways.
Fungus Removal: The process of removing black or green fungal growth on damp surfaces.
Flow Rate (GPM): Gallons per minute; indicates how much water the pressure washer outputs — higher GPM cleans faster.
G
Gutter Cleaning: Removing leaves, sludge, and buildup from gutters using a low-pressure attachment.
Graffiti Removal: Eliminating paint or marker stains using specialized solvents and pressure adjustments.
Ground-In Soil: Deep-embedded dirt on concrete and porous surfaces that requires pre-treating and high-pressure rinsing.
H
Hot-Water Pressure Washing: Cleaning with heated water to dissolve grease and stubborn stains more effectively than cold water.
High-Pressure Hose: Reinforced hose designed to handle the high PSI output of a pressure washer.
Hydraulic Oil Stains: Dark spots on concrete or asphalt removed using degreasers and hot-water cleaning.
I
Injection System: Equipment feature allowing detergents to mix automatically with water flow.
Irrigation Overspray: Mineral buildup from sprinkler systems, often requiring acidic cleaners for removal.
Inspection: Pre-service review of surface type, stains, and pressure tolerance to determine the correct cleaning method.
J
Jet Stream: Concentrated high-pressure stream used for spot cleaning tough stains.
Joint Cleaning: Pressure washing along concrete expansion joints to remove dirt and weeds.
K
Kill Ratio: The concentration of sanitizer or bleach solution strong enough to neutralize mold and mildew spores.
Karcher Coupler: A quick-connect fitting used on pressure washer hoses and spray wands for easy attachment.
L
Low-Pressure Rinse: A gentle rinse following detergent application, often used in soft washing to protect siding.
Limestone Cleaning: Low-pressure, pH-neutral cleaning process to avoid surface etching on limestone walls or patios.
Line Mark Removal: Using controlled heat and pressure to remove painted lines from pavement.
M
Mildew Remover: A chemical cleaner formulated to break down mildew on exterior surfaces.
Moss Treatment: Application of biocide or detergent to kill moss before rinsing.
Maintenance Wash: Regularly scheduled light washing to prevent heavy buildup.
N
Nozzle Tip: Interchangeable tip that controls pressure and spray angle — usually color-coded for quick identification.
Neutral Cleaner: Balanced-pH cleaning solution safe for delicate surfaces.
Non-Slip Treatment: Application that increases traction on driveways, patios, and pool decks after cleaning.
O
Oil Stain Removal: Using degreasers and hot water to extract petroleum-based stains from concrete or asphalt.
Oxidation Removal: Cleaning away chalky, sun-faded residue from painted metal or vinyl siding.
Organic Growth: Mold, algae, or mildew buildup on shaded or damp surfaces.
P
PSI (Pounds per Square Inch): Measurement of pressure output; determines cleaning power.
Pre-Treatment: Applying detergents or degreasers before washing to loosen soil.
Post-Treatment: Applying protective sealers or detergents after washing to prevent regrowth or staining.
Q
Quick-Connect Fittings: Couplers that allow fast connection or removal of hoses and nozzles.
Quality Inspection: Post-cleaning walkthrough ensuring consistent finish and no surface damage.
R
Rotary Surface Cleaner: Circular pressure washing attachment that provides even cleaning over large flat surfaces.
Rust Stain Removal: Removing orange or brown discoloration from metal oxidation using acid-based cleaners.
Rinse Pattern: The technique used to evenly rinse away detergent and loosened soil.
S
Soft Washing: Low-pressure cleaning process using specialized detergents to safely clean siding, roofs, and painted surfaces.
Sealing: Applying a water- or solvent-based coating to protect cleaned surfaces from stains and moisture.
Stain Lifting: Treating and removing specific stains such as oil, rust, or tannins after washing.
T
Tannin Stains: Brown stains from leaves or wood that leach tannins onto surfaces, requiring specialty cleaners.
Trailer-Mounted System: Professional pressure washer setup mounted on a trailer for mobile operations.
Two-Step Wash: A cleaning process that applies detergent first and neutralizer second for a complete clean.
U
Ultra-Low Pressure: Minimal pressure used for delicate materials like stucco or painted wood.
Under-Eave Cleaning: Washing soffits and trim areas under roof edges to remove cobwebs and dirt.
Upstream Injection: Mixing detergent before the pump for stronger chemical application.
V
Variable Pressure Wand: Adjustable spray wand that lets the operator change PSI mid-cleaning.
Vinyl Siding Cleaning: Low-pressure washing process that removes oxidation and mildew without stripping paint or color.
Vertical Surface Cleaning: Technique for walls and fences, preventing streaks or runoff lines.
W
Water Recovery System: Equipment that collects and filters wastewater during commercial washing to meet environmental regulations.
Wet Sandblasting: Combining water and abrasive media to remove paint, rust, or coatings.
Wand Control: Operator skill in maintaining consistent distance and angle for uniform results.
X
X-Jet: A chemical injection system that applies detergents at high concentration without passing through the pressure pump.
Y
Yellow Tip (15° Nozzle): High-pressure, narrow-angle nozzle for tough surface cleaning.
Yield Pressure: The maximum pressure setting before risk of surface damage.
Z
Zero-Degree Nozzle: A pinpoint nozzle producing maximum cutting pressure for stubborn spots; used with caution on durable surfaces only.
Zone Cleaning: Focusing pressure washing by area or surface type for efficiency and precision.