10 Things You Should Never Pressure Wash

1. Asphalt shingle roofs

High pressure strips the protective granules off shingles — years of roof life gone in an afternoon, and most shingle warranties void the moment a pressure washer touches them. The black streaks are algae, and the shingle manufacturers themselves prescribe the fix: a low-pressure soft wash, which is exactly how we clean roofs.

2. Vinyl, LP and fiber-cement siding

High pressure forces water up behind the panels — into sheathing and insulation where it breeds mold you cannot see — and it can crack vinyl outright in cold weather. Siding gets cleaned with detergents at roughly garden-hose pressure. That is the whole premise of a professional house wash.

3. Windows and window seals

Pressure washers blow out glazing seals — that is where foggy, permanently condensated double-pane windows come from — and can crack glass at close range. Windows get soft-washed or hand-cleaned; here is how we do them.

4. Wood decks and fences

Wood at high pressure furs up into splinters, shows wand marks like a bad haircut, and takes stain unevenly afterward. Cedar and pine clean beautifully at low pressure with the right mix — see deck and fence cleaning done right.

5. Brick with aged mortar

Brick itself is tough; the mortar between 40-year-old bricks is not. High pressure gouges soft mortar joints and lets water into the wall. Older brick homes — and Kansas City has thousands — get the soft-wash treatment, as we covered in can you pressure wash a brick house.

6. Painted surfaces

A pressure washer is a paint stripper with a trigger. Unless you are prepping to repaint — where controlled washing is actually step one, done the way we describe in washing a house before painting — keep high pressure off anything painted you want to stay painted.

7. Electrical meters, panels, outlets and fixtures

Water driven at 2,000+ PSI defeats every weather seal on your meter base, exterior outlets and light fixtures. Around electrical equipment we bag, tape and hand-detail — never blast.

8. AC condensers

The aluminum fins on your outdoor AC unit bend flat under high pressure, choking airflow and cutting the unit’s efficiency. Condenser fins want a gentle rinse from the garden hose, nothing more.

9. Vehicles

Automotive clear coat is thinner than a sticky note. Pressure-washer tips chip paint, peel clear coat and force water past door seals. Wash the car with car equipment; save the pressure washer for the driveway under it — that part we do.

10. People, pets and plants

It sounds obvious until every ER doctor tells you otherwise: a zero-degree tip cuts skin at close range like a blade. And your landscaping is not much tougher — on every job we pre-wet and rinse plant beds so detergents never sit on the greenery.

So what CAN you pressure wash?

Concrete, pavers, stone patios and pool decks — hard mineral surfaces built to take it. Everything else on your property gets cleaned better, and safer, with soft washing. That split — and why professionals carry one machine but many methods — is explained in What Is Power Washing? and soft washing vs. pressure washing.