Can You Pressure Wash an Awning? Why Not, the Few Exceptions, and What to Use Instead
Quick answer
You should not pressure wash a fabric awning. Even low settings can strip the water-repellent finish, fray seam thread, force water through stitch holes and tear aged fabric, and many fabric warranties exclude that damage. Use a garden hose, mild soap and a soft brush instead. Rigid aluminum awnings can tolerate a low-pressure wide-fan rinse from a distance, with care.
No, you should not pressure wash a fabric awning. A pressure washer delivers water at many times household tap pressure, and at that force it abrades the factory water-repellent finish on acrylic, erodes the coating on polyester and vinyl, frays and cuts seam thread, and drives water into stitch holes, hems and the roller. On older fabric weakened by sun, it can simply blow a hole through the canopy. Many fabric warranties exclude damage from high-pressure cleaning. A garden hose, mild soap, a soft brush and a thorough rinse clean an awning as well without the risk.
The narrow exceptions are rigid awnings, such as aluminum, which tolerate a careful low-pressure rinse, and professional soft-wash systems that use low pressure with cleaning solutions. Details below.
How much more force a pressure washer delivers
Typical US household water pressure is roughly 40 to 80 psi at the tap, and a garden hose nozzle delivers that or less at the fabric. Consumer electric pressure washers are commonly rated around 1,300 to 2,000 psi, and gas models often 2,500 to 4,000 psi.
Worked example
Compare a 1,500 psi electric pressure washer with a home at 60 psi. 1,500 / 60 = 25, so the washer is rated at 25 times the pressure behind your garden hose. Even a 3,000 psi gas machine set back to what feels like a "gentle" distance is concentrating far more energy on a narrow strip of fabric than a hose ever can.
Now the cost side. A professional clean typically costs about $100 to $400. Re-covering a residential retractable after a blown seam or torn panel typically costs $500 to $2,000. If pressure washing turns a $0 hose-and-soap job into even a seam re-stitch at a few hundred dollars, it has already cost more than a professional cleaning would have.
What pressure washing does to an awning
| Component | What happens | How it shows up |
|---|---|---|
| Water-repellent finish (acrylic) | Abraded and stripped | Fabric soaks through and stays wet; dirt and mildew return faster |
| Coating (polyester, vinyl) | Eroded, lifted at edges | Peeling or flaking backing, leaks, chalky patches |
| Seam thread | Frayed and cut, especially sun-weakened thread | Seams opening along panels weeks later |
| Stitch holes and hems | Water forced through and trapped | Drips at seams, mildew in hem pockets |
| Aged fabric | Fibers torn by the jet | Holes, frayed lines tracking the spray path |
| Printed graphics (commercial) | Ink and clear coat lifted | Faded or patchy lettering |
| Motor head, end caps, sensors | Water driven past seals | Motor or receiver faults, corroded contacts |
| Arm joints and gearbox | Lubricant washed out, grit driven in | Squeaking, stiff elbows, gear wear |
The damage is often delayed. A seam that was weakened by the jet may open during the next windy week rather than while you are washing, which is why people often do not connect the two. If you already pressure washed and see problems, see awning repair for seams and tears, and motorized awning troubleshooting if the motor misbehaves afterward.
Pressure washing by awning type
| Awning type | Pressure washer? | Better method |
|---|---|---|
| Solution-dyed acrylic (retractable, fixed, window) | No | Hose, mild soap, soft brush; re-treat finish after deep cleaning |
| Coated polyester | No | Hose, mild soap, soft brush; protect the coating |
| Vinyl and vinyl-coated polyester | No for DIY; professional soft wash only | Vinyl awning cleaner, soft brush or microfiber |
| RV vinyl or acrylic awning | No | Hose, RV awning cleaner, soft brush; see RV awning cleaning |
| Mesh drop shades and solar screens | No | Hose and soft brush; rinse from the back |
| Aluminum (pan, slat, insulated panel) | Low pressure only, wide fan tip, at a distance | Hose and soft brush or car-wash mitt |
| Polycarbonate panels | Generally no; check maker | Hose, mild soap, soft cloth; protect the UV surface layer |
| Glass canopies | Low pressure possible; check seals | Glass cleaner and squeegee from a safe platform |
Aluminum awnings: the main exception
Rigid aluminum awnings with a baked or powder-coated finish can usually handle a low-pressure rinse. If you use a pressure washer on one, keep it at the lowest setting, use a wide fan tip (40 degrees or the white tip on many machines), keep the nozzle at least 2 to 3 feet away, and spray downward with the slope so water does not drive up under laps, flashing or the wall ledger. Avoid aiming at seams, sealant lines and fasteners. Old or chalking paint can be stripped by the jet, so test a small area first. A soft brush and hose is still the lower-risk choice.
Polycarbonate panels
Polycarbonate roofing panels usually rely on a UV-protective layer on the sun-facing side. Abrasion or a high-pressure jet can damage that layer and lead to yellowing and embrittlement. Many panel makers advise mild soap, lukewarm water and a soft cloth, and some warn against high pressure. Follow your panel maker's guidance. More on rigid materials in metal and polycarbonate awnings.
What about professional soft washing?
Soft washing uses low pressure, often similar to a garden hose, combined with cleaning solutions applied by sprayer, a dwell time, and a gentle rinse. Some commercial awning cleaners use this approach on large vinyl storefront canopies where hand-brushing hundreds of square feet is impractical. Done properly with fabric-appropriate cleaners, it avoids the mechanical damage of high pressure. Ask any contractor what pressure and chemicals they use, whether they follow the fabric maker's care guidance, and whether they rinse plants and surroundings. A cleaner who shows up with a standard high-pressure rig for a fabric awning is the wrong hire.
The safer way to deep clean an awning
- Extend fully and dry brush. Remove leaves, pollen and loose dirt with a soft brush before wetting.
- Wet with a garden hose. A standard spray nozzle on a shower or wide setting is enough. Spray from above and with the slope.
- Apply soap solution. Mix about 1/4 cup mild soap per gallon of lukewarm water (under about 100°F). Apply with a soft brush, sponge or pump sprayer.
- Let it dwell. Give it a few minutes to loosen dirt, keeping it wet.
- Brush gently. Use a soft brush on an extension pole for both faces. Spot treat stains using our awning stain removal table.
- Rinse thoroughly. Rinse until no suds remain; soap residue feeds mildew.
- Dry completely before retracting. Leave extended until dry, including hems and the valance.
- Re-treat acrylic. After a deep clean, apply a fluoropolymer fabric protector made for outdoor acrylic to restore water repellency.
The full method, including ratios for heavier grime and frame care, is in how to clean an awning. For mildew, follow awning mold and mildew.
Pro tip: A rinse every 2 to 4 weeks in season keeps dirt from building to the point where a pressure washer seems tempting. Five minutes with a hose is the best protection against needing a deep clean.
Pressure washing the house, deck or patio under an awning
If you are pressure washing siding, a deck or a patio near the awning, retract it first so the jet and dirty spray cannot hit the fabric. Keep the spray away from the awning's motor head, wall brackets and any wall-mounted sensor, and do not spray upward under the hood or cassette. After you finish, extend the awning and rinse off any grime that settled on it with a hose. Washing the wall around brackets at high pressure can also drive water into fastener holes; check that sealant around brackets is intact afterward.
Who can and cannot use a pressure washer
Do not pressure wash if you have any fabric awning (residential, RV or commercial), a mesh shade, a motorized awning with exposed motor or sensors, or a canopy still under fabric warranty.
A cautious low-pressure rinse may be acceptable for rigid aluminum awnings in sound condition and some glass canopies, following the maker's instructions.
Hire a professional for second-storey awnings, large commercial vinyl canopies, or awnings with heavy mildew. Professional cleaning typically costs about $100 to $400.
Frequently asked questions
Can I pressure wash my awning on a low setting?
For fabric awnings, no. Even low settings deliver many times the pressure of a garden hose in a concentrated jet, enough to strip the water-repellent finish, fray seam thread and force water into stitch holes. Damage often shows weeks later as opening seams or leaks. A hose, mild soap and soft brush clean fabric effectively without that risk.
Does pressure washing void an awning warranty?
It can. Fabric warranties commonly exclude damage from improper cleaning, and many care guides specifically warn against high-pressure washing. If a seam fails or the coating peels after pressure washing, a claim may be refused. Read your fabric maker's current care instructions and warranty terms before using anything other than a hose and mild soap.
Can I pressure wash an RV awning?
No. RV vinyl and acrylic awnings face the same risks as residential fabric: coating damage, seam wear and water forced into the roller and hardware. Power RV awnings also have motors and wiring near the roller. Use a hose, an RV awning cleaner and a soft brush, rinse thoroughly, and let the fabric dry fully before rolling it up.
Can you pressure wash an aluminum awning?
Usually yes, with care. Use the lowest setting and a wide fan tip, stay at least 2 to 3 feet away, and spray down the slope rather than up under laps, flashing or the wall connection. Avoid sealant lines and fasteners. Old, chalking paint can be stripped, so test first. A soft brush and garden hose remain the safest option.
What should I use instead of a pressure washer on an awning?
Use a garden hose, a mild soap solution of about 1/4 cup per gallon of lukewarm water, and a soft brush on an extension pole. Dry brush first, apply the soap, let it dwell, brush gently, rinse until no suds remain, and let the awning dry completely before retracting. Re-treat acrylic with a fabric protector afterward.
Sources and further reading
- Glen Raven, Inc.: Sunbrella cleaning and care guide
- Professional Awning Manufacturers Association (PAMA): awning care resources
- U.S. Consumer Product Safety Commission: pressure washer safety information
- Dometic and Lippert: owner's manual care instructions for RV awnings
How we write our guides: figures are typical US ranges checked against manufacturer documentation, published standards and installer pricing. Read our editorial standards. Spotted an error or outdated detail? Request a correction.