Tile Roof Washing in Orange County: Clay, Concrete and Flat Roofs Explained
Dark streaks, moss and lichen on your tile roof? Here's how professional roof washing works for each roof type in Orange County, and what to expect.
Most Orange County homes have concrete or clay tile roofs. Over time, shaded and north-facing sections pick up dark streaks, green moss and crusty lichen. Roof washing — also called roof cleaning — removes that growth and brings the roof back to an even color.
What causes dark streaks and moss on tile roofs?
The dark staining is usually algae. Moss and lichen grow where moisture lingers: under trees, on north-facing slopes, and in neighborhoods that get the morning marine layer, like Laguna Niguel, Dana Point and Mission Viejo. Leaves and debris from nearby trees hold moisture against the tiles and speed up growth.
How roof washing works by roof type
- Clay tile: the most delicate. We use careful pressure and technique and take extra time, which is why clay is priced higher.
- Curved (S-style) concrete tile: the curves trap debris and growth in the valleys, so each row needs attention.
- Flat concrete tile: the quickest tile roof to wash evenly.
- Asphalt and architectural shingle: washed with the right pressure and a soft-wash treatment so granules stay in place.
- Flat and low-slope roofs: cleaned of dirt, debris and growth so water drains properly.
Is it safe to walk on and wash a tile roof?
Tiles can crack if they're walked on carelessly, especially older concrete and clay. We work from ladders or the ground whenever possible and use trained foot placement when walking the roof is necessary. Our No-Break Guarantee means that if a tile cracks because of our work, we repair or replace it at no cost to you.
How long do results last?
Most roofs stay clean for about 3 to 6 years after a professional wash. Roofs under heavy tree cover or in damp coastal areas may need cleaning sooner.
What affects the price of roof washing?
Roof material, size, pitch, number of stories and how much growth is on the roof all play a part. Most Orange County homes fall between $900 and $2,000.
Where we wash roofs
We're based in Lake Forest and wash roofs across Orange County, including Irvine, Laguna Niguel, Mission Viejo, Rancho Santa Margarita and Dana Point.
Frequently asked questions
Is roof washing the same as roof cleaning?
Yes. Both terms describe removing algae, moss, lichen and streaks from the roof.
How often should a tile roof be washed in Orange County?
Most roofs stay clean for 3 to 6 years after a professional wash, depending on shade, trees and moisture.
What if a tile cracks?
Our No-Break Guarantee covers it: if a tile cracks because of our work, we repair or replace it at no cost to you.
How much does roof washing cost?
Most Orange County homes fall between $900 and $2,000, depending on roof type, size, pitch and condition.
