Roof Cleaning
Kill Moss at the Root — Without Damaging the Shingles.
Standard pressure washing strips the protective granules off asphalt shingles. We use low-pressure treatment methods instead.
The Problem
Moss and algae streaking are common on Western Washington roofs with tree cover or north-facing shade. Left untreated, moss lifts shingle edges and holds moisture against the roof deck.
What You Get
Why work with JBA on this.
No high-pressure washing
High-pressure equipment strips granules and can void manufacturer warranties — we don't use it on asphalt shingle roofs.
Root-level treatment
Treatment targets moss at the root, not just the visible surface growth.
Process
How it works
- 01
Assess
Check the extent of moss or algae growth and any shingle lifting it's caused.
- 02
Treat
Apply low-pressure treatment to kill growth at the root.
- 03
Clear
Remove debris and treated growth from the roof surface and gutters.
If you’re comparing quotes and one of them mentions a pressure washer for your asphalt shingle roof, ask about it directly — it’s one of the more common ways a roof cleaning job accidentally shortens the life of the roof it was meant to help.
Homeowner Questions
Roof Cleaning Questions
Will pressure washing damage my roof or void the warranty?
Get the moss handled before it lifts another shingle.
Safe for your shingles, effective at the root.
24-Hour Service · Financing Available