Prestige Tile & Stone Cleaning
Serving San Diego County
Residential & Commercial
Mon–Fri 8am–5pm · Sat 10am–2pm
Quick answer
How Is Flagstone Cleaned Without Damaging It?
Flagstone is cleaned with specially formulated cleaners and low-pressure washing that remove dirt, debris and algae without damaging the stone or washing out the joints. Because flagstone is porous, it should then be sealed with a penetrating sealer: clear for a natural matte look, or an enhancing sealer for richer color and some sheen.
Why it matters
A Durable Stone That Still Needs Care
Flagstone comes in red, blue and buff tones, and its beauty and durability have made it a building material for centuries. Today it is used for floors, fireplaces, patios, walkways, retaining walls and more.
Flagstone can describe several sandstone formations with different mineral content, but they all need similar care. Water collects in the porous stone, and depending on the minerals in the water and stone, that can leave marks, which is why sealing is strongly recommended.
About the material
What Makes Flagstone Different?
Flagstone is a durable, permeable stone used for patios, paths and floors. Because it is permeable, water collects in it, and depending on the chemistry of the water and the stone, that can leave imperfections. Outdoors it also picks up dirt, debris and algae.
Permeable
Water collects in the stone and can leave marks.
Mostly outdoors
Patios, walkways and other large outdoor areas, and some floors.
Algae & debris
Outdoor flagstone collects dirt, debris and algae.
Sealer choice
Clear penetrating for a matte look, enhancing for richer color.
Services
Flagstone Services
Cleaning
Specialized cleaners and low pressure remove dirt, debris, algae and spots.
Sealing
Clear penetrating sealer for a matte look, or an enhancing sealer for deeper color.
Restoration
Neglected flagstone brought back with stain removal, washing and resealing.
Sanitizing
Hot water and the right sanitizing products for the stone.
Maintenance
A care plan that fits your needs and budget so flagstone never gets neglected.
Our process
How We Clean and Seal Flagstone
Large flagstone areas are hard to clean well by hand. This is our method.
01
Assess
We check the stone, spots and stains, algae and any old sealer.
02
Low-pressure clean
Specially formulated cleaners and low-pressure washers remove dirt, debris and algae without damage.
03
Treat spots
Specialized cleaners are used on remaining spots.
04
Sanitize
Appropriate sanitizing materials and hot water for the stone’s needs.
05
Seal
A penetrating sealer helps the stone resist moisture and improves its look.
Care tips
How to Keep Flagstone Looking Good
A few habits make a big difference in how flagstone weathers.
- Hose off or mop up spills quickly to avoid staining.
- Never use abrasive or acidic cleaners on flagstone.
- Sweep or dust-mop regularly to remove sand and grit that scratch.
- Use doormats indoors and out to cut down tracked-in grit.
- Use a penetrating sealer to help the stone resist moisture.
- Indoor and outdoor flagstone may need different sealers, and weather and use affect how often to reapply.
Compare the options
Which Sealer Suits Your Flagstone?
We recommend sealing flagstone. The choice is mostly about the look you want.
| Clear penetrating sealer | Enhancing penetrating sealer | |
|---|---|---|
| Look | Matte, natural | More saturated color, some shine |
| Protection | Helps resist moisture | Helps resist moisture |
| Indoors or out | Products can differ by location | Products can differ by location |
What to avoid
What to Avoid on Flagstone
These tips make a big difference to how flagstone weathers.
- Abrasive or acid cleaners
- Leaving spills; hose or mop them up quickly
- Letting sand and grit build up on indoor floors
- Assuming one sealer suits indoor and outdoor stone
Estimates
What Affects Your Estimate
Every estimate is based on the surface itself, and you receive it in writing before any work is booked. These are the main factors that shape it.
Area
Large patios and walkways or smaller areas.
Condition
Dirt, algae, spots or neglected stone.
Restoration
Stain removal, washing and resealing.
Sealer
Clear or enhancing penetrating sealer.
Service Area
Flagstone Cleaning in San Diego County
We clean, restore and seal flagstone patios, walkways and floors for homes and businesses throughout San Diego County, with a maintenance plan that fits your budget.
Related services
Related Tile & Stone Services
Sealing
Exterior Sealing
Stone, concrete and tile outdoors.
Sealing
Pool Deck Cleaning & Sealing
Stone pool decks cleaned and protected.
Cleaning
Natural Stone Cleaning
Stone-safe cleaning after pre-testing.
Restoration
Tile & Stone Restoration
Honing, polishing and refinishing.
- Tile & Grout
- Bath & Shower Tile
- Ceramic & Porcelain
- Natural Stone
- Architectural Stone
- Cantera & Adoquin
- Cement Tile
- Concrete
- Concrete Pavers
- Countertops
- Cultured Stone
- Engineered Stone
- Exterior Stone
- Glass Tile
- Granite
- Interior Floors
- Limestone
- Marble
- Metal Tile
- Mosaic Tile
- Onyx
- Quarry Tile
- Quartz
- Quartzite
- Saltillo & Mexican Tile
- Sandstone
- Slate
- Soapstone
- Terracotta
- Terrazzo
- Travertine
- Pool Tile
- Wood Floors
Common questions
Frequently Asked Questions
Can flagstone be pressure washed?
Yes, at low pressure with the right cleaners, so the stone and joints are not damaged.
What sealer should I use on flagstone?
A penetrating sealer. Choose a clear one for a natural matte look or an enhancing sealer for richer color and some sheen.
What cleaners should I avoid?
Abrasive and acidic cleaners, which can damage flagstone.
Can neglected flagstone be restored?
Usually. Stain removal, thorough washing and resealing bring most neglected flagstone back, and routine care afterward keeps it from getting that way again.
Get Started
Ready for Cleaner Tile, Grout & Stone?
Tell us what needs cleaning and we'll help you work out the right next step, with no pressure either way.
Free estimates
Surface-safe methods
Residential & commercial