Last Updated on October 20, 2026 by Umar Farooq
A surface cleaner for pavers is a round hood with a spinning bar that you attach to a pressure washer and push across the patio like a floor polisher. It works best on flat, well-packed pavers, because the spray stays under the hood at a steady distance and leaves no wand stripes. It does not protect the joint sand, so plan to top up the joints afterwards. If your patio is wavy or the sand is already low, use a wand at low pressure instead. (Yes, a tool whose whole job is to be neat still leaves work for you.)
What a hood does that a wand can't
A wand is only as even as your arms. Move closer and you cut a clean stripe; drift away and you leave a dirty one. A hood fixes the distance for you. The spray spins inside a cover, so the water, dirt and algae stay put until the hose carries them off.
That is also why Kärcher's guide to cleaning pavers points to a surface cleaner with a rinsing function for flat areas. Its rinse nozzle carries dirty water away, and it reaches green deposits on edges and in corners. For heavier dirt on a handheld model it suggests a rotor nozzle held nearly vertical, about 15 cm (6 in) from the ground.
I looked for a manufacturer that says a surface cleaner is safe to run over any paver patio. None does. They all talk about surface and joint damage, and that is where the real decision sits.
Is your patio flat enough for a spinning hood?
A hood rides on the high points. A wavy patio makes it scalp those and skip the low ones. In the professional thread I read on this, one contractor won't surface-clean pavers set in sand if they are uneven, while another says flat pavers can be cleaned this way, depending on how even they are.
A quick check before you rent or buy anything:
- Lay a straightedge across the pavers. ICPI's tolerance for pedestrian routes is 1/8 in of lippage between neighbouring pavers (ICPI Tech Spec 2). If you can slide about two stacked quarters under the straightedge, the surface is out of tolerance and a hood will behave badly.
- Wiggle a few pavers with your foot. Anything that rocks needs resetting before it needs cleaning. See how to fix sunken pavers.
- Look at the joints. If the sand is down near the base of the pavers, a hood will clear what is left.
- Look for polymeric sand that is still fresh. Give it its full cure time first.
Pass all four and a hood is a good fit. Fail any of them and use a wand or a brush.
Rent a surface cleaner for pavers before you buy one
I'll say the cheap thing first: for one small patio, a hose, a stiff broom and a mild detergent get a lot of dirt off. Unilock's maintenance advice starts with a soap and water solution or mild detergent, scrubbed with a soft-bristled broom or rinsed with a hose, and keeps the pressure washer for tougher stains.
A hood earns its place on big flat areas: a driveway, a long walkway, a patio you clean every spring. Then rent one for a day and see whether you like the result before spending money. It is the same logic as renting a plate compactor rather than buying one: a tool that gets used once a year spends the rest of the time in the garage.
Check that the hood's rating matches your machine's pressure and flow before you pay for the day.
Run it slow, overlap the passes, work downhill
- Sweep first. Grit and leaves scour the surface under the hood. A leaf blower does it in a minute.
- Pull weeds out of the joints with a joint scraper before the water goes on, as Kärcher suggests, or the spray flings them and the sand around their roots.
- Wet the surface and pre-treat stains. A mild paver cleaner, left on for its label's dwell time, does more than extra pressure.
- Start at the high side. Kärcher says to work with the slope so dirty water runs off rather than across finished sections.
- Overlap each pass by a few inches and keep the hood moving at a steady walking pace. Stopping in one spot digs a pale patch.
- Use a wand for edges, steps and corners, held at an angle and moving, as in power washing pavers.
Keep the pressure moderate. The 1,200 to 1,800 PSI range in that guide came from a masonry contractor's advice; your machine's manual and your paver's maker are the authority for your surface.
Concrete, brick and granite don't take the same punishment
Kärcher says natural stone such as granite or basalt is sturdy enough for a pressure washer, while concrete and terracotta can be damaged quickly by the jet. It also warns that pavers with very wide joints should not be hit hard, since the slabs can come loose.
In plain terms: if you don't know what your pavers are, test one corner under the hood first, in a spot nobody sees, and look at it dry. A rough, lighter patch is the surface paste coming off, and it won't come back. If your patio is sealed, the sealer is a coating that a hood can scuff, so read paver cleaning before you begin.
After the cleaner: check the joints before you do anything else
Kärcher is blunt about it: if the jet hits the gaps, the material in them goes, and you may have to refill them with sand. Plan on that rather than hoping.
Once the pavers have dried:
- Sweep fresh joint sand in until the joints are full, and compact lightly if the sand type calls for it. Joint depth and rules for sand type are in how to re-sand pavers.
- If you use polymeric sand, follow its data sheet for the steps and the watering.
- Wait for the surface to be thoroughly dry before any sealer. Sealer data sheets list their own minimums.
If the joints look like a haze of dried powder after a polymeric sand job, that is a different problem: polymeric sand haze needs a cleaner, not more cleaning.
A flat patio, a rented hood and a bag of sand on standby
A surface cleaner for pavers is a good tool on the right patio. Flat surface, firm joints, moderate pressure, steady passes and a bag of joint sand ready for the end of the day. Anything else, go back to the broom.
FAQ
Can you use a surface cleaner on pavers?
Yes, on flat, firmly set pavers with solid joints. The hood keeps the spray at a steady distance and removes wand stripes. On uneven or loose pavers it will skip low areas and scuff high ones, so use a wand or a brush instead.
Does a surface cleaner remove the sand between pavers?
It can. Kärcher notes that spray hitting the gaps takes the material out of them, so you may need to refill the joints with sand afterwards. Check the joints once the pavers are dry and re-sand where they are low.
Is a surface cleaner better than a pressure washer wand?
For large flat areas, usually, because the result is even and it is quicker. For edges, steps and small patios the wand is more practical. Most people end up using both: a hood for the field, a wand at an angle for the corners.
Can a surface cleaner damage pavers?
Yes, if the pressure is too high for the paver. Kärcher says concrete and terracotta can be damaged quickly by the jet, while granite and basalt are sturdier. Test an out-of-sight spot and look at it once it is dry.
Should I seal pavers after using a surface cleaner?
Only if you have a reason to, such as stain protection or color. Let the pavers and joints dry fully first, and follow the sealer's own wait times. The reasoning is in pros and cons of sealing pavers.
