How to Prepare Your Home Before an Exterior Cleaning Visit

Most of what goes wrong during an exterior cleaning visit is decided before the crew arrives.

A window left slightly open, a patio set nobody moved, a hairline crack in the stucco that was never mentioned. None of these is dramatic on its own, and all of them turn a straightforward appointment into water on a hardwood floor, a delayed start, or a repair conversation.

Preparation takes about an hour and covers three things: clearing what is in the way outside, sealing what water can get into, and telling the crew what they cannot see for themselves.

This guide covers all three, plus what to expect on the day and what to check before the truck leaves.

Why Preparation Changes the Result

Exterior cleaning applies water and cleaning solution to every square inch of a surface, including the gaps.

That is the part homeowners underestimate. Water at working pressure finds any opening that exists, whether that is a failed window seal, a gap around a vent, or a crack in stucco that has been there for years without causing trouble. Rain falls downward and drains away. Cleaning water arrives from angles rain never reaches, and it keeps arriving for as long as the crew is working that wall.

The second factor is speed. A residential exterior clean is a few hours of continuous work. A crew that has to move planters, wait for a gate to be unlocked, or work around a car in the driveway loses time on your appointment, and rushed work is where mistakes happen.

The third is knowledge. Crews assess what they can see. They cannot see that the third window from the left does not seal, that the side door swells and no longer latches, or that a section of stucco was patched two summers ago. That information only exists with you, and it only helps if it is shared before work starts rather than after.

So preparation is really about closing three gaps. Physical access, water entry points, and what the crew knows about your property. The sections below cover each in the order the crew will encounter them.

What to Do Outside the House

The exterior is where the crew needs room to work. An hour of clearing the day before saves time on the appointment and removes most of what commonly gets damaged.

What Should You Move Before the Crew Arrives?

Clear everything within roughly six feet of any surface being cleaned. That distance covers overspray, runoff, and the room a crew needs to work a wand or a lance properly.

Move these:

• Patio and deck furniture, including cushions, umbrellas, and rugs
• Potted plants and planters, which are easier to relocate than to protect in place
• Grills, heaters, and fire pits, covered if they cannot be moved
• Vehicles, out of the driveway and off the street directly in front if driveways or walkways are being cleaned
• Toys, bikes, tools, and hoses, which are trip hazards as much as damage risks
• Door mats and welcome mats, which soak and hold runoff against the threshold

Two items get missed almost every time. Solar landscape lights sit low and are easily knocked or blasted out of position, so pull them and set them aside. And bird feeders, wind chimes, and hanging decorations near the roofline sit directly in the path of soft wash solution.

The same applies to anything on a patio or sport court, so clear those fully if decks and patios are part of the booking.

Do You Need to Cover Plants Before Pressure Washing?

No, and covering them with plastic sheeting makes things worse rather than better.

Plant protection is the crew’s job, and the method is water rather than barriers. Professional practice is to pre-soak all vegetation in the work zone before any cleaning solution is applied, keep foliage wet during application, and rinse thoroughly afterward. The reason is that hydrated plant cells absorb less sodium hypochlorite, which is the active ingredient in most exterior cleaning solutions. Flooding the root zone is the real protection.

Sheeting defeats that. It traps solution against the foliage underneath and prevents the rinse from reaching it, so anything that lands there concentrates instead of diluting.

What genuinely helps is smaller. Water your garden beds thoroughly the evening before or the morning of the visit, which starts the plants hydrated before the crew arrives. Move anything in a pot. And point out specimen plants you are particularly attached to, since a mature Japanese maple or a newly planted shrub warrants extra attention that the crew will give if they know it matters.

Outdoor Electrical and Fixtures to Protect

Water and electricity are the one genuine safety issue on this list.

Cover exterior outlets with weatherproof covers if they have them, or tape over them with plastic and painter’s tape if they do not. Unplug anything running outdoors, including landscape lighting transformers, pond and fountain pumps, holiday lighting, and extension cords.

Check three specific fixtures. Exterior light fixtures with cracked or missing seals will take on water, so flag any you know about. Doorbell cameras and security cameras should be noted so the crew can work around them rather than spraying directly. And exposed junction boxes or any outlet with a damaged cover need pointing out before work starts, not after.

If your property has a well pump, a pool equipment pad, or an outdoor AC condenser, mention all three. Crews will avoid them, but only if they know where they are.

Gates, Access, and Pets on Cleaning Day

Access problems are the most common reason a job starts late.

Unlock every gate the morning of the appointment and leave them unlocked. Clear the path from the driveway to the work areas, since crews run hoses and carry equipment along it. Confirm where the outdoor water spigot is and that it works, and if you have a gate code, an alarm, or a locked side yard, give those details when you book. Access matters most where the work runs along a boundary, which is usually the case with fences and walls.

Pets need to be indoors, in a room away from the exterior walls, being cleaned, for the full visit. Noise, unfamiliar people, open gates, and cleaning solution on the ground are four separate reasons. Pick up anything from the yard that you would not want rinsed across the lawn, and lift water bowls and pet beds out of the work zone.

What to Do Inside the House

This is the half most homeowners skip, and it is where the actual damage happens. Water reaching an interior is almost always preventable, and almost always preventable from inside.

How Should You Prepare Your Windows?

Close and latch every window, then check them a second time.

Latching matters more than closing. A window pushed shut but not locked often leaves a small gap at the seal, and that gap is exactly what water at working pressure finds. Turning the latch pulls the sash tight against the weatherstripping, which is what actually seals it.

Pay attention to the ones that are easy to forget. Bathroom and laundry windows get opened for ventilation and left that way. Basement and garage windows are rarely checked. Second-floor windows in rooms nobody has used that week are the most commonly missed of all.

Older windows deserve a specific mention to your crew. Single-pane wood frames, windows with visible gaps, and any window with failed or missing weatherstripping will take on water even when fully closed. If you know which ones those are, say so, and consider taping plastic over them from the inside as a backup.

Doors, Vents, and Openings That Let Water In

Every opening in an exterior wall is a potential entry point, and several are not obvious.

Close and latch all exterior doors, including the garage side door and any basement or cellar access. Check that screen doors and storm doors are properly shut rather than resting closed. If a door swells and no longer latches cleanly, mention it rather than assuming the crew will notice.

Then check the openings that are not doors or windows. Dryer vents, bathroom and kitchen exhaust vents, attic and crawlspace vents, mail slots, pet doors, and window air conditioning units all sit in exterior walls, and all of them are designed to let air move rather than to keep pressurized water out. Cover what you can, and flag what you cannot.

Turn off any whole-house fan or attic fan for the duration of the visit. A fan running while an exterior wall is being cleaned actively draws moisture and solution into the space behind it.

What to Move Away From Exterior Walls

The precaution most people skip, and the cheapest insurance in this article.

Move anything valuable, absorbent, or difficult to replace away from the interior side of walls being cleaned. That means artwork and framed photographs on exterior-facing walls, electronics and power strips on the floor beneath windows, books, papers, and anything stored directly against an exterior wall in a garage or basement.

This is not a prediction that water will get in. It is recognition that if a seal fails somewhere, you will not know until you see the evidence, and by then the item has already been sitting in it.

Two extra steps for older homes. Lay a towel along interior windowsills on the walls being cleaned, which catches anything that seeps and shows you immediately if it has. And check window wells and basement egress windows from outside beforehand, since debris in a window well blocks drainage and turns runoff into standing water against the glass.

What to Tell Your Crew Before They Start

Preparation handles what you can control. This section covers what only you know, and it prevents the damage that no amount of clearing and closing can.

Existing Damage the Crew Cannot See

Tell the crew about every fault you are aware of, including the ones you have lived with for years.

Cracks in stucco or siding, loose or missing boards, a section of trim with soft or rotting wood, previous water intrusion anywhere, patches and repairs, and any window or door that does not seal properly. Also mention loose mortar, damaged flashing, and any area of the roof or gutter line you already know is compromised.

Two reasons this matters. Cleaning over an existing crack drives water into it rather than past it, so a cosmetic fault becomes a moisture problem. And a documented, disclosed condition is a different conversation afterward than an undisclosed one, which protects both parties.

Point these out during the walkthrough rather than describing them. A crew looking at the actual crack will adjust technique for that wall. A crew told there is a crack somewhere on the north side.

Surface Materials That Change the Cleaning Method

Materials determine method, and getting this wrong is the most expensive mistake in exterior cleaning.

Stucco needs soft washing rather than pressure. It is rigid but brittle, so high pressure chips the finish and drives moisture into hairline cracks where it cannot dry. Soft washing runs at roughly 500 PSI or less against 1300 to 1700 for traditional pressure washing, using solution and dwell time instead of force. This is why house washing and siding cleaning in Los Angeles is quoted by surface rather than as one flat service.

Tile roofs need the same treatment for a different reason. Clay and concrete tiles crack under roughly 150 pounds, less than most adults weigh, so professional roof cleaning is done from a ladder or from the ground.

This applies to most homes in Los Angeles. Stucco is the default exterior across the city’s housing stock, from the Spanish Colonial and Mediterranean Revival homes of the 1920s through the postwar tracts of the Valley, and tile roofs are common on all of them. Most LA homeowners booking an exterior clean own at least one surface that should never see high pressure, so confirm the method rather than assuming it has been noticed.

Flag anything else that changes the approach, including recently painted surfaces, wood and composite decking, natural stone, pavers with polymeric sand, and any surface under warranty. Paint under four years old needs lower concentration and is worth mentioning specifically.

Water Access and Drainage on Your Property

Crews need water, and they need somewhere for it to go.

Confirm the location of exterior spigots and that they have working pressure. On properties where the outdoor supply has been shut off, or a spigot has failed, that becomes a problem at the start of the appointment rather than a question beforehand.

Drainage matters more on Los Angeles hillside properties than most homeowners expect. Runoff follows the grade, so a home in the Hollywood Hills, Silver Lake, or the hillside stretches of the Valley sends water downhill toward retaining walls, a neighbor’s lot, or a lower terrace rather than into a nearby drain. Tell your crew where water naturally travels on your property and where it collects, since that determines where they work from and how they manage the flow.

Also flag any drain, culvert, or catch basin near the work area, along with anything sensitive that sits downhill of it, including vegetable gardens, koi ponds, and pool equipment.

What Happens During and After the Visit

Knowing what the day looks like removes most of the uncertainty, and the last fifteen minutes matter more than people expect.

Where to Be While the Crew Is Working

You do not need to be home for the whole visit, but you should be there at the start and at the end.

The walkthrough at the beginning is when you point out the cracks, the window that does not seal, and the plants you care about. Ten minutes there prevents most of what goes wrong later. If you cannot be present, send photographs and written notes when you book rather than leaving it to be discovered.

During the work, stay inside with windows and doors closed. Cleaning solution carries in the air, surfaces underfoot become genuinely slippery, and crews work faster without needing to watch for anyone in the area. Keep children and pets indoors for the same reasons.

Expect noise. Equipment runs continuously, and a residential exterior clean typically takes two to six hours depending on the property. Worth mentioning to neighbors in advance if you share a wall or a driveway.

How Long Do Cleaned Surfaces Take to Dry?

Most surfaces are touch-dry within a few hours, but drying time varies by material and by where the surface sits.

Concrete driveways and walkways usually dry within two to four hours in Los Angeles conditions. Wood decking takes longer, often a full day, because water penetrates rather than sitting on top. Shaded areas and north-facing walls take considerably longer than anything in direct sun, and a shaded side yard can still be damp the following morning.

Wait until surfaces are fully dry before walking on them where you can. Wet concrete and wet composite decking are slippery, and treated wood is soft while saturated. If you need to cross an area, do it carefully rather than assuming a few hours of sun has finished the job.

Hold off on replacing furniture, rugs, and planters until the surface underneath is dry. Putting a rug back onto damp decking traps the moisture and produces exactly the staining you just paid to remove.

What to Check Before the Crew Leaves

Walk the property with the crew while they are still there. This is the single most useful thing you can do at the end of the visit.

Check these:

• The cleaned surfaces themselves, in daylight, including the areas you cannot see from the ground
• Every window and door, opened and checked for water on the inside sill
• The rooms behind the walls that were cleaned, particularly ceilings and window frames
• Gates left open, and outdoor power reconnected
• Landscaping, for foliage that looks stressed or discolored
• Any area you flagged during the walkthrough, confirmed as handled

Raise anything you notice while the crew is on site. A missed section takes five minutes to redo with the equipment still connected and becomes a return visit once the truck has gone.

Check the following morning again. Water intrusion often takes hours to show, and a stain on a windowsill or a damp patch on an interior wall is easier to resolve as a same-week conversation than as something noticed a month later.

Ready to clear away stubborn exterior dust? Pressure Washing of Los Angeles, powered by Rolling Suds of Beverly Hills, provides professional residential pressure washing, house washing, and siding cleaning throughout Los Angeles County. Restore a cleaner, brighter exterior with service tailored to your property’s surfaces and exposure.