Veco did an assessment and gave me a very competitive estimate. They started and completed the work ...
Veco did an assessment and gave me a very competitive estimate. They started and completed the work right on time. Very impressed with the work and will definitely recommend them.
We had Igor from Veco windows replace the glass in our awning-type kitchen window after the seal was...
We had Igor from Veco windows replace the glass in our awning-type kitchen window after the seal was broken. Our estimate for completely replacing the window was over $1500, but to just replace the glass was about $400 through Veco. We were very happy with a fix that was 1/4 the price of a full replacement. It took a couple of hours. Igor was professional, methodical, neat, and made it look like new. We were very happy. Thank you Igor!
How to Wash Siding, Even When You Don’t Feel Like It
Understanding Soft Washing vs Pressure Washing
When it comes to siding washing, there is a fundamental distinction that every homeowner should know before turning on a machine: the difference between high-pressure washing and low-pressure soft washing. While both methods clean exterior surfaces, using the wrong approach on your home’s walls can lead to costly structural damage.
Pressure washing relies on mechanical force—blasting water at thousands of pounds per square inch (PSI)—to physically strip away grime, mud, and stains. This approach works well for hard, durable surfaces like concrete driveways or flagstone patios. However, applying high pressure directly to siding can chip paint, dent aluminum, crack vinyl, and etch soft materials.
Soft washing, by contrast, relies on specialized cleaning chemistry combined with low-pressure water flow (often no more pressure than a standard garden hose attachment). The cleaning solution breaks down organic growth—such as green algae, mold, mildew, and lichen—at a microscopic level, loosening surface dirt so it can be safely rinsed away. To learn more about this approach, read about Soft Wash Exterior Cleaning in Lake Forest IL The Gentle Way to Shine.
Why Low-Pressure Siding Washing Protects Your Home
Vinyl and polymer siding are engineered to protect your home from downward rainfall, but they are not designed to withstand concentrated high-pressure water streams. High pressure can cause moisture intrusion by forcing water past the overlapping seams and into the unsealed wall cavity behind the panels. Once trapped inside, this hidden moisture creates an environment for mold growth, wood rot, and structural decay that may go unnoticed for years.
Using low pressure protects your home in several ways:
Prevents Water Intrusion: Gentle, controlled water application flows over siding lap joints naturally without forcing water behind the weather barrier.
Avoids Surface Damage: Low pressure will not crack brittle vinyl, strip protective clear coats, or gouge softer surfaces.
Protects Perimeter Features: Delicate window seals, trim caulking, and nearby glass remain intact during a gentle clean. If you are also cleaning surrounding fixtures, take a look at our guide on Soft Washing.
Eliminates Growth at the Root: Biological growth like algae and mildew consists of living organisms. High-pressure water merely shears off the surface layers, leaving living spores behind in the siding’s texture to regrow within weeks. Soft wash chemistry kills these organic spores completely.
Recognizing Signs That Siding Needs Cleaning
It is easy to adapt to the gradual accumulation of dirt on your home’s exterior until obvious signs appear. Identifying these warning signs early helps prevent long-term staining and surface degradation:
Green Streaks and Algae Growth: Common on shaded, north-facing walls in communities like Northbrook and Deerfield, green organic films thrive in damp conditions.
Black or Dark Mildew Spots: Often appearing in sheltered locations under porch roofs, soffits, and eaves where rainwater cannot naturally wash them away.
Chalky Residue (Oxidation): Over time, direct sunlight breaks down exterior pigments, creating a chalky film on vinyl or painted aluminum.
Musty Odors Near Exterior Walls: Dampness or lingering mildew smells along outdoor walls indicate trapped moisture and organic accumulation.
Dull, Faded Curb Appeal: A general yellowing or graying shift in your siding’s color after winter weather cycles.
Essential Equipment, Material Settings, and Safety Steps for Siding Washing
Before beginning any siding washing project, setting up the correct pressure ratings, selecting proper spray tips, and taking preliminary safety precautions are essential.
Working with powered washing equipment carries safety risks. High-pressure streams can cause severe skin injuries, shattering glass, or instant destabilization if operated from an elevated height. We strongly advise working from the ground using extension wands rather than operating a pressure washer from a ladder, as trigger kickback can easily disrupt your balance.
Site preparation is equally important:
Electrical Safety: Cover all exterior outlets, light fixtures, electrical meters, and doorbell cameras with heavy plastic sheeting and painter’s tape.
Vent Protection: Seal exterior dryer vents and HVAC intakes to prevent moisture from blowing indoors.
Plant Hydration: Pre-wet surrounding flower beds, lawns, and shrubs with fresh water before and during the application of detergents. Water-saturated plants absorb less cleaning chemistry, protecting them from chemical burn.
Matching Pressure Settings and Nozzles to Material Types
Every siding material tolerates different levels of physical pressure. Using excessive PSI on delicate surfaces like cedar shake or fiber cement can ruin finishes permanently. Below is a breakdown of proper material settings, matching guidance from this expert guide on How to Pressure Wash Siding: PSI, Angle & Steps (2026).
Vinyl Siding: Maintain 1,300 to 1,600 PSI using a wide 40-degree white tip, holding the nozzle 2 to 3 feet back from the surface. While some medium-high pressure washers reach 2,500 to 3,000 PSI, high settings should be reserved for concrete or masonry, not vinyl.
Aluminum Siding: Keep pressure low at 1,200 to 1,500 PSI using a 40-degree tip. Excessive pressure can dent metal panels or strip factory paint coatings.
Wood and Cedar Shake: Extremely sensitive to pressure. Use a gentle 500 to 800 PSI setting with a soft fan pattern to prevent gouging or wood fiber stripping (“fuzzing”).
Stucco and EIFS: Soft surfaces require 1,200 to 1,500 PSI with a 40-degree tip. High-pressure streams can blast away fine texture or damage soft dash coatings.
Brick and Mortar: Brick tolerates 1,500 to 2,000 PSI using a 25-degree or 40-degree tip. Avoid high pressure on aged, soft historic mortar joints in older homes across Park Ridge and Niles.
Cold Weather Precautions and Lead Paint Compliance
Performing siding washing during late autumn or cold weather months introduces distinct challenges:
Brittle Vinyl: When temperatures drop below 50°F, vinyl siding becomes rigid and brittle. High-pressure impact under cold conditions can crack panels easily. Low-pressure soft washing is essential during cooler periods.
Freezing Hazards: Water trapped behind trim or on walkways can freeze quickly, creating dangerous slip hazards or ice damage within siding seams.
For homes built before 1978, lead paint considerations are critical. The EPA’s Renovation, Repair, and Painting (RRP) guidelines apply whenever older painted surfaces are disturbed. High-pressure washing on pre-1978 homes can fracture flaking lead paint, scattering lead dust and paint chips across surrounding soil. If cleaning older painted surfaces, low-pressure washing must be combined with total wastewater capture and debris containment to ensure safety and environmental compliance.
Step-by-Step Guide to Applying Detergents and Rinsing
Achieving a clean finish without streaks requires the right sequence: soap from the bottom up, rinse from the top down. Following a clear, methodical process yields the best results for your home’s exterior. Learn more about professional exterior care techniques in The Ultimate Guide to Power Washing in Lake Forest IL.
Preparing Detergents and Solutions for Seasonal Siding Washing
Relying solely on plain water pressure leaves biological roots behind, allowing mold and algae to regrow quickly. Effective cleaning requires specialized solutions:
Mildewcide & Bleach Formulas: A diluted solution of sodium hypochlorite (bleach) mixed with water and an exterior surfactant breaks down mildew and algae cell walls. A standard home mix combines 1 quart of 5% sodium hypochlorite, 1/3 cup of laundry detergent (without added perfumes), and 3 quarts of clean water.
Trisodium Phosphate (TSP) Blends: For severe grease, dirt, or heavy industrial grime, adding TSP to your cleaning blend provides additional cleaning strength.
Non-Bleach Cleaners: Eco-friendly cleaners use specialized surfactants or oxygenated formulas to break down stains without risk to sensitive landscaping, lawns, or outdoor clothing. Hose-end sprayer products provide an easy alternative for small DIY touch-ups.
Regardless of the chemical formula selected, always allow a dwell time of 5 to 10 minutes for the detergent to break down biological growth. Never let detergent dry completely on the siding, as dried soap leaves stubborn white streaks.
Why You Should Never Spray Upward into Siding Laps
The fundamental structural rule of siding washing is angle control: never point your spray wand upward under siding laps.
Exterior siding is engineered like fish scales or roof shingles—each panel overlaps the one beneath it so that gravity pulls rainwater down and away from the building envelope. When a spray wand is angled upward, pressurized water is forced under the overlapping seams, driving moisture directly behind the exterior drainage plane and into the house framing, insulation, and drywall.
Always keep your spray nozzle level with or directed slightly downward relative to the wall surface, maintaining a consistent distance of 2 to 3 feet from the siding.
Step-by-Step Washing Sequence
To achieve a clean, streak-free result without risking water intrusion, follow this step-by-step process:
Inspect and Repair: Walk the perimeter of your home in Mount Prospect or Buffalo Grove to check for broken trim, unsealed openings, or damaged caulk.
Protect the Area: Cover electrical fixtures, close all windows tightly, and thoroughly saturate surrounding flower beds with fresh water.
Apply Soap Bottom-to-Top: Attach your low-pressure detergent nozzle (black nozzle) and apply cleaning solution starting at the bottom of the wall, sweeping side-to-side as you work your way up. Applying soap from the bottom up prevents dirty detergent runoff from streaking across dry surfaces below.
Allow Dwell Time: Let the chemistry work for 5 to 10 minutes. If the wall begins drying too quickly in sunny weather, lightly mist it with water to keep the solution active.
Rinse Top-to-Bottom: Switch to your low-pressure rinsing tip (40-degree white nozzle). Rinse starting at the roofline or top course of siding, sweeping smoothly from side to side as you move downward, allowing clean water and dissolved grime to flow naturally down the wall.
Flush Landscaping: Once rinsing is complete, wash down surrounding lawn, gardens, and shrubbery once more with fresh water to dilute any detergent residue.
Frequently Asked Questions About Exterior Cleaning
How often should home siding be cleaned?
For most residential properties across Northbrook, Skokie, and surrounding Chicagoland communities, siding should be washed once per year. Annual cleaning prevents pollen, atmospheric dust, and organic spores from embedding deeply into siding finishes. Homes with heavy shade, dense surrounding tree cover, or north-facing walls prone to lingering moisture may benefit from minor spot cleaning every six months to manage algae buildup.
Can you power wash siding in cold weather below 50 degrees?
While possible, caution is required. High pressure should never be used on vinyl siding when ambient temperatures drop below 50°F because cold vinyl turns brittle and cracks under impact. Gentle soft washing with low pressure is safer in cooler months. However, washing should be avoided entirely if temperatures approach freezing (32°F), as ice can form inside siding joints and create structural lifting.
How much does professional siding washing cost in Northbrook, IL?
Professional siding washing costs depend on several key home parameters rather than a fixed flat rate:
Home Size and Square Footage: Larger two-story or multi-level homes require more setup time and specialized equipment.
Siding Material: Delicate materials like historic wood shake or detailed stucco require specialized low-pressure chemical treatments.
Level of Biological Accumulation: Heavy, multi-year algae growth or heavy mildew buildup requires higher chemical concentrations and longer dwell times.
Accessibility: Architectural complexity, high gables, and steep rooflines influence overall project scope.
Investing in professional soft washing offers great value by eliminating the risks of ladder accidents, siding damage, and hidden water intrusion behind your walls.
Conclusion
Regular siding washing is one of the most effective ways to preserve your home’s curb appeal, protect exterior finishes, and prevent long-term damage caused by mold, algae, and accumulated grime. By choosing low-pressure soft washing methods, using proper downward spray angles, and applying effective cleaning solutions, you can keep your home looking vibrant year after year without risking hidden water intrusion.
When DIY maintenance feels overwhelming, or when high gables and delicate siding materials require specialized expertise, turning to trained professionals is the safest choice. At VECO Window Washing and Gutter Cleaning, we provide safe residential and commercial exterior care throughout Northbrook, Oak Park, Skokie, Park Ridge, Mount Prospect, Niles, Buffalo Grove, Libertyville, Vernon Hills, Deerfield, Morton Grove, and across Chicagoland.
Whether your home needs gentle exterior house washing, clear window cleaning, or debris-free gutter care, our team delivers consistent results using safe equipment and tailored techniques. Explore our professional soft washing services today to refresh your home’s exterior safely and effortlessly.
Need window, gutter or exterior cleaning in Northbrook, across the North Shore or surrounding suburbs? Send us your property details for a free estimate.
