Every summer we get calls from Burlington homeowners who watched a neighbor pressure wash their vinyl siding and now have streaks, cracked panels, or water pushed behind the trim. Pressure washing your house is one of the fastest ways to cause damage most insurance policies will not cover. Soft washing is the answer for almost every vertical surface on your home, and it is what siding manufacturers actually recommend.
Here is the plain-English breakdown of when each method belongs and why it matters in Vermont.
What pressure washing actually is
Pressure washing uses high-PSI water — often 2,500 to 4,000 PSI at the nozzle — to physically blast grime off a surface. It is a mechanical cleaning method. Good for concrete, brick pavers, and unsealed hardscape. Bad for anything that flexes, has seams, or lives under paint.
On vinyl or wood siding, that pressure will:
- Force water up under laps and behind trim, soaking your sheathing
- Etch or gouge softer materials like cedar and painted wood
- Strip caulking around windows and doors
- Void the manufacturer warranty on most vinyl siding brands
What soft washing actually is
Soft washing uses low pressure — closer to a garden-hose flow — combined with a manufacturer-approved cleaning solution. The chemistry does the work, not the force. Sodium hypochlorite plus a surfactant breaks down the algae, mildew, and pollen that grow on north-facing walls in our lake-humid climate, then a gentle rinse carries it all off.
The result on a Burlington cape or colonial is uniform, streak-free clean siding that lasts noticeably longer than a pressure wash. And because the biology gets killed at the root, the green film that comes back every August takes twice as long to return.
When each method is right
Use soft wash for:
- Vinyl, aluminum, wood, and cedar shake siding
- Stucco and EIFS
- Asphalt shingle roofs (never pressure wash a roof — you will strip the granules)
- Painted trim, fascia, and soffits
- Composite decking
Use pressure wash for:
- Concrete driveways and walkways
- Brick or stone patios and pavers
- Retaining walls
- Unsealed masonry
For Vermont homes specifically, the soft wash approach handles two problems pressure alone cannot touch — the north-side algae film from Lake Champlain humidity, and the black streaks on north-facing roofs from gloeocapsa magma. Both are biological, and both need chemistry, not force.
Why this matters for insurance and resale
If a pressure-washed panel cracks or water intrusion damages sheathing behind the siding, most homeowner policies exclude cleaning-related damage. Documented use of a soft wash method — with manufacturer-approved chemistry and a fully insured contractor — protects the house and the warranty.
We use the soft wash approach on every siding, roof, and painted-surface job. Concrete gets pressure. That is the whole rule. Learn more about our house wash service in Burlington VT or see what your specific house would run.
The short version
If it is on your house, it wants soft wash. If it is on the ground, pressure is fine. Anyone offering to pressure wash your siding for a discount is not saving you money — they are creating a future repair bill.
Ready to see what your house would look like clean? Book your estimate or call Zackary directly at (802) 585-5563. Same-week appointments are usually available through October, and every quote comes with a locked-in bracket price before we start.
Ready when you are
Book your house washing in 60 seconds
No walk-through required for standard homes. Same-week appointments most weeks. Locked-in pricing before we start.