Service · Van Nuys & the Valley
Roof cleaning, without a pressure washer.
If a company offers to pressure wash your roof, decline. It removes the granules that protect asphalt shingle and cracks the tile it is walked on.
Typical range
Confirmed before anything starts — and it comes down if the job is simpler than the photos suggested.
| Job | Typical |
|---|---|
| Single storey tile or shingle | $450 – $700 |
| Two storey | $650 – $950 |
| Flat or low-slope | $400 – $650 |
| Gutters flushed afterwards | included |
The detail
What this job actually involves
Why pressure is the wrong tool up there
Asphalt shingle is protected by a layer of mineral granules. Pressure strips them, which is why a pressure-washed roof looks great for a season and then ages fast — and it will usually void what remains of the manufacturer's warranty. Concrete and clay tile crack under both the pressure and the foot traffic, and the leak shows up in the first real rain.
The black streaks are alive
Those dark streaks running down a roof are typically a hardy algae, not dirt. Knocking it off with pressure leaves the root structure; it returns within a year. A soft wash with the correct solution kills it, and it stays gone for years rather than months.
How a roof should be washed
- Walked only where the structure takes it — on brittle tile the work is done from ladders and edges rather than crossing the field.
- Growth killed and rinsed at low pressure, from the ridge down.
- Gutters and downpipes flushed afterwards, because everything lifted off the roof ends up in them.
- Landscaping below wetted first and rinsed after.
Some roofs should be declined. If tile is already cracked, or a shingle roof is near the end of its life, washing it can turn a tired roof into a leaking one. Better to hear that from the ground than discover it from your ceiling.
Also
Other cleaning jobs
Where
Areas we cover
Get it priced
Five questions, or send photos. Either way you get a number, not a rate.