The Ultimate Checklist to Prep Your Johns Creek Home for Pressure Washing
Pressure washing can restore your home’s curb appeal—if done right. Skipping prep work risks damage, wasted time, or lackluster results. We’ve pressure washed thousands of homes in Johns Creek and surrounding areas like Alpharetta and Roswell, so we know what it takes to get surfaces truly clean without harm.
Why Prep Work Is Non-Negotiable
Pressure washers deliver 1,500–4,000 PSI—enough to etch concrete or strip paint if aimed wrong. Proper prep protects surfaces and ensures the wash removes grime, not just redistributes it.
Johns Creek’s humid summers and pollen-heavy springs leave stubborn organic stains. Prep helps our team target these issues with the right detergents and techniques, like soft wash for roofs or hot water for oil-stained driveways.
Never pressure wash asphalt shingles, old wood, or loose masonry. High pressure can cause costly damage. Leave these to professionals.
Clear the Work Area Like a Pro
Move patio furniture, potted plants, and outdoor decor at least 10 feet from the house. This prevents damage and gives us unobstructed access to walls, decks, and fences.
Trim back shrubs and tree branches touching the house. Overgrowth traps moisture, accelerating mold and mildew growth—common issues we see in neighborhoods near Chattahoochee River corridors.
Protect What Can’t Be Moved
Cover electrical outlets, light fixtures, and HVAC units with plastic sheeting and painter’s tape. Water intrusion can short circuits or corrode components.
Seal gaps around windows and doors with towels or drop cloths. Even low-pressure washing can force water into cracks, leading to interior leaks.
Inspect and Repair Surfaces First
Walk the perimeter and note cracks in driveways, loose siding, or rotting deck boards. Pressure washing won’t fix structural issues—it can make them worse.
For concrete, fill small cracks with caulk; for wood decks in areas like Peachtree Corners, replace splintered boards before cleaning. This ensures a uniform finish and prevents water from seeping beneath surfaces.
Pre-Wash Surface Inspection
- Check for loose or damaged siding, shingles, or bricks
- Look for cracks in concrete or asphalt
- Inspect decks and fences for rot or protruding nails
- Test for lead paint (pre-1978 homes) before disturbing surfaces
Choose the Right Cleaning Method for Each Surface
Not all surfaces tolerate the same pressure or detergents. Vinyl siding needs a wide-angle nozzle (25–40 degrees) and a mild surfactant. Brick and stucco require lower PSI to avoid pitting.
For roofs in Johns Creek, we always use soft wash—a low-pressure technique with specialized algaecides. It’s the only safe way to remove black streaks without damaging shingles.
| Surface | PSI Range | Nozzle Angle | Cleaning Method |
|---|---|---|---|
| Vinyl Siding | 1,200–1,900 | 25–40° | Detergent + Rinse |
| Concrete Driveway | 2,500–3,500 | 15–25° | Hot Water + Degreaser |
| Wood Deck | 500–1,200 | 40° | Soft Wash + Brightener |
| Brick/Stucco | 1,000–1,500 | 40° | Low Pressure + pH-Neutral Cleaner |
| Asphalt Roof | N/A | N/A | Soft Wash Only |
Pre-Treat Stubborn Stains and Growth
Johns Creek’s high humidity fosters mold, mildew, and algae—especially on north-facing walls or shaded decks. Pre-treating with a bleach-based or oxygenated cleaner breaks down these organisms before the wash.
For oil stains on driveways near garages, apply a degreaser and let it dwell for 10–15 minutes. Agitate with a stiff brush for best results. This step is critical in areas like Duluth, where older homes often have oil-stained concrete.
Let cleaning solutions sit for 5–10 minutes before rinsing. This allows chemicals to penetrate and lift grime, reducing the need for excessive pressure.
Check Your Water Supply and Drainage
Pressure washers require a steady water supply—typically 3–5 GPM. Ensure your outdoor spigot can handle the demand, especially in older homes in Roswell or Alpharetta.
Direct downspouts away from the house and clear gutters beforehand. Clogged gutters can overflow during cleaning, causing water to pool near foundations or siding.
Plan for Post-Wash Maintenance
Pressure washing strips away protective sealants on decks, fences, and even some siding. Plan to reapply waterproofing or stain within 48 hours for wood surfaces in Cumming or Johns Creek.
For concrete, consider a penetrating sealer to prevent future oil stains or moisture absorption. This is especially useful for driveways exposed to heavy vehicle traffic.
How to Prep Your Deck for Pressure Washing
Decks take a beating from foot traffic, pollen, and moisture—here’s how to ready yours for a deep clean.
- 1Clear the Surface
Remove all furniture, grills, and planters. Sweep away leaves and debris to prevent clogging the pressure washer.
- 2Inspect for Damage
Check for loose boards, popped nails, or rot. Replace or repair any compromised areas before washing.
- 3Pre-Treat with Cleaner
Apply a deck brightener or oxygen bleach solution to kill mold and lighten grayed wood. Let it dwell for 10–15 minutes.
- 4Protect Nearby Plants
Wet down landscaping with a garden hose and cover with tarps. Cleaning solutions can harm plants if not rinsed away.
- 5Test a Small Area
Use a low-pressure nozzle (40°) on an inconspicuous spot. Adjust distance and pressure until you achieve a clean, undamaged finish.
Frequently Asked Questions
How often should I pressure wash my home in Johns Creek?
Most homes need a wash every 12–24 months, but factors like tree cover, proximity to busy roads (like GA-400), or humidity levels may require more frequent cleaning. Request a quote for a tailored recommendation.
Can pressure washing damage my brick or stucco?
Yes, if done incorrectly. High pressure can erode mortar or pit stucco. We use low PSI and specialized nozzles for masonry, along with pH-balanced cleaners to safely restore these surfaces.
Is soft wash better than pressure washing for my roof?
Soft wash uses low pressure and algaecides to kill roof algae (Gloeocapsa magma) without damaging shingles. Pressure washing can strip granules—never DIY this task.
Do I need to prep differently for commercial pressure washing?
Commercial properties often have larger, more durable surfaces but also more foot traffic and grease stains. Prep includes clearing dumpsters, covering signage, and coordinating with tenants to avoid disruptions.
When is a good time of year to pressure wash in Georgia?
Spring and fall offer ideal conditions—mild temperatures and lower humidity help surfaces dry quickly. Avoid freezing temps or extreme heat, which can affect cleaning solutions and drying times.
Will pressure washing remove paint from my house?
It can if the paint is old, peeling, or low-quality. We adjust pressure and use wide-angle nozzles to minimize risk. For homes with lead paint (common in pre-1978 builds), special precautions and testing are required.