Portland’s damp climate builds up moss, algae, and mildew on hard surfaces faster than almost anywhere in the country. Royal Works Lawn Care pressure washes driveways, walkways, patios, decks, and siding across the metro.
Moss & Algae Removal for Driveways, Walkways & Siding
Moss-covered walkways aren’t just unsightly — they’re slick and dangerous underfoot. We pressure wash hard surfaces to remove built-up moss, algae, and mildew, restoring safety and curb appeal.
- Driveways, walkways, and patios
- Decks and fencing (technique adjusted for wood)
- House siding and foundation lines
- Moss and algae removal from shaded, damp areas
- Pressure and technique adjusted by surface type
Why Portland Surfaces Need This More Often
Constant rain, shade from mature tree canopy, and cooler temperatures create ideal conditions for moss and algae growth on hard surfaces — conditions most of the country simply doesn’t deal with year-round.
- Most properties benefit from washing once or twice a year
- Heavily shaded, moss-prone areas may need more frequent visits
- Wood decking washed at lower pressure to avoid damage
- Concrete and pavers washed at higher pressure for full moss removal
Serving Portland & the Metro Area
We provide this service throughout Portland, Gresham, Happy Valley, Tigard, Oregon City, Vancouver WA, Clackamas, Sandy, Boring, Corbett, Gladstone, West Linn.
Frequently Asked Questions
Once or twice a year for most properties, more often in heavily shaded, moss-prone areas.
We adjust pressure and technique by surface type to avoid damage — not all surfaces get the same treatment.
Yes, siding and foundation lines are included, with pressure adjusted to avoid damaging paint or siding material.
We focus on ground-level hard surfaces — driveways, walkways, patios, decks, and siding. Ask us about roof-specific moss treatment separately.
Regrowth timing depends on shade and moisture exposure — heavily shaded areas may need annual or twice-yearly washing to stay ahead of it.
Pair pressure washing with Aeration & Moss Control for a full moss strategy across your lawn and hardscape.