How to Clean an Awning: A Complete Guide by Fabric Type
Quick answer
Clean most awnings with lukewarm water (under about 100°F) and a mild soap mixed at roughly 1/4 cup per gallon, a soft brush, and a gentle garden-hose rinse, then let the fabric air dry fully before retracting. Avoid pressure washers, harsh solvents and undiluted bleach, and re-treat acrylic fabric with a fluoropolymer water repellent after deep cleaning.
To clean an awning, brush off loose dirt, wet the fabric with a garden hose, scrub gently with a soft brush and a mild soap solution (about 1/4 cup of gentle dish soap per gallon of lukewarm water), let it sit a few minutes, rinse until no suds remain, and leave the awning extended until it is completely dry. That routine is safe for solution-dyed acrylic, coated polyester and vinyl. What changes between fabrics is how you treat stubborn stains and mildew, which chemicals are off limits, and whether you need to restore water repellency afterward.
This guide covers each fabric in turn, the cleaning solutions worth mixing, the tools and products that cause damage, care for the frame and arms, a seasonal schedule, and how to re-treat fabric. For mildew specifically, see our dedicated guide to removing awning mold and mildew.
Before you start: identify the fabric and check the warranty
The right method depends on what the canopy is made of. If you do not have the paperwork, these clues usually settle it:
- Solution-dyed acrylic (Sunbrella, Recasens, Sattler, Dickson and similar) feels like soft woven canvas, shows the same color on both faces, and lets a little light through the weave.
- Coated or laminated polyester often has a smooth or slightly rubbery back face and a printed or dyed front. Many budget retractable awnings use it.
- Vinyl or vinyl-coated polyester is smooth and glossy or matte on both faces, fully waterproof, and common on commercial and RV awnings.
- Mesh or screen fabric (often PVC-coated polyester) has visible open weave and is used for shade screens and some fixed awnings.
If you are unsure, our comparison of acrylic, polyester and vinyl awning fabric explains how to tell them apart. Then read the warranty's care section: fabric warranties typically exclude damage from improper cleaning. Sunbrella, for example, publishes cleaning instructions alongside its 10-year limited warranty.
Safety: Do not stand on a ladder and lean over an extended retractable awning, and never put weight on the arms or front bar. Clean the top surface from a stable ladder at the front edge, from an upstairs window, or by angling a soft brush on an extension pole.
The basic cleaning method (all fabrics)
- Pick the right day. Choose a mild, overcast or shaded day with no rain forecast for 24 hours. Strong sun dries soap onto the fabric before you can rinse it.
- Extend fully and set the pitch. Open the awning all the way so no fabric remains wrapped on the roller. A slightly steeper pitch helps rinse water run off.
- Dry brush first. Use a soft-bristle brush (a car-wash or upholstery brush, not a stiff deck brush) to remove leaves, pollen, cobwebs and bird droppings before you add water.
- Wet both sides. Hose the top and underside with a normal garden nozzle on a shower or soft-stream setting.
- Apply the soap solution. Work in sections of about 3 to 4 feet, scrubbing in light overlapping circles. Clean the underside too, where cobwebs and insect residue collect.
- Let it dwell. Leave the solution on for 5 to 15 minutes, keeping it damp, so it can lift grime without hard scrubbing.
- Rinse thoroughly. Rinse from the roller side down to the front edge until the runoff has no suds. Leftover soap attracts dirt and can encourage mildew.
- Air dry extended. Leave the awning open until both faces and the hems are dry to the touch, usually 2 to 6 hours. Never use a heat gun or hair dryer.
Cleaning solutions and mixing ratios
Most routine cleaning needs nothing stronger than mild soap. Use a gentle, dye-free dish soap or a mild liquid laundry soap, not a degreaser or a product with solvents. The table gives starting ratios; always test a hidden corner first.
| Purpose | Mix | Suitable for | Notes |
|---|---|---|---|
| Routine cleaning | 1/4 cup mild soap per 1 gallon lukewarm water | Acrylic, polyester, vinyl, mesh | Water under about 100°F |
| Heavier grime, tree sap residue | Same mix, longer dwell, second pass | All | Spot treat sap with a product the fabric maker approves |
| Mildew and organic stains | 1 cup household bleach + 1/4 cup mild soap per 1 gallon water | Solution-dyed acrylic only (check maker) | Rinse very thoroughly; protect plants and metal |
| Vinyl surfaces | Mild soap solution, or a cleaner labeled for vinyl awnings | Vinyl, vinyl-coated polyester | Avoid solvent and petroleum cleaners |
| Mildew on polyester or vinyl | Cleaner labeled safe for that fabric | Polyester, vinyl | Bleach can weaken coatings and fade dyes |
Worked example
A 12 ft wide awning with a 10 ft projection has 120 sq ft of fabric per face, or 240 sq ft counting the underside. In practice a gallon of soap solution covers roughly 100 to 150 sq ft of fabric with a brush, so plan on about 2 gallons: 2 gallons of lukewarm water plus 1/2 cup of mild soap. If you also need a mildew pass on a solution-dyed acrylic canopy, mix that separately at 1 gallon water, 1 cup bleach and 1/4 cup soap, and apply it only to the affected areas rather than the whole awning.
How to clean by fabric type
Solution-dyed acrylic
Acrylic is the most forgiving fabric to clean because the color is in the fiber, not printed on the surface. It tolerates the mild soap routine and, according to major makers, a diluted bleach solution for mildew without color loss. Two cautions: scrubbing hard can roughen the finish and remove the factory water repellent, and leaving bleach on too long or failing to rinse can weaken stitching thread. After any deep clean or bleach treatment, plan to re-treat the fabric (covered below).
Coated or laminated polyester
The waterproofing on polyester comes from a coating or film, usually on the underside. Treat that coating gently: soft brush only, mild soap only, no bleach unless the manufacturer explicitly allows it. If the back coating has started to peel or flake, cleaning will not fix it and aggressive scrubbing will accelerate it. That is often the first sign the canopy is approaching the end of its 5 to 10 year typical life (see how long awnings last).
Vinyl and vinyl-coated polyester
Vinyl sheds dirt well but shows streaks and black mildew spots on its surface. Use mild soap or a cleaner sold for vinyl awnings or RV awnings. Avoid petroleum solvents, acetone, and abrasive cleaners, which can strip plasticizers and leave the surface chalky or tacky. Vinyl does not need a water repellent, but some owners apply a UV protectant made for vinyl to slow surface aging. On RVs, the same rules apply; our RV awning care guide covers rig-specific issues.
Mesh and screen fabrics
Mesh traps dust in its openings. Rinse from the back side first to push dirt out the way it came in, then use mild soap and a soft brush, never high pressure.
Metal and polycarbonate awnings
Aluminum awnings clean up with the same mild soap solution and a non-abrasive sponge. Polycarbonate panels scratch easily: use a microfiber cloth, mild soap, and never ammonia-based glass cleaners, which can cloud some sheets. Details are in our guide to metal and polycarbonate awnings.
What not to use on an awning
- Pressure washers. Even on low settings, a pressure washer can blast out the factory finish, fray seam thread, push water through stitch holes, and tear weakened fabric. Many fabric warranties exclude damage from high-pressure washing. A garden hose is enough.
- Bleach on polyester, vinyl or printed fabrics. Chlorine can fade surface dyes and degrade coatings. On acrylic, use it only diluted, as above.
- Undiluted bleach on anything. It weakens fibers and thread and can leave white blotches on dyed components.
- Solvents and degreasers. Acetone, mineral spirits, citrus degreasers and paint thinner damage coatings and repellent finishes.
- Hot water. Water above about 100°F can shrink some fabrics and soften coatings.
- Stiff brushes, scouring pads and abrasive powders. These abrade the surface and pull yarns.
- Retracting while wet. Rolling damp fabric is the most common cause of mildew lines and creases on retractable awnings.
Pro tip: If you must retract early because of wind or rain, extend the awning again within 24 to 48 hours on the next dry day and let it air out completely.
Frame, arm and hardware care
Clean fabric on a neglected frame still fails. Most retractable frames are powder-coated aluminum that can last 15 to 25 years or more when kept clean.
- Wash the roller cassette or hood, front bar, arms and mounting brackets with the same mild soap solution and a sponge. Rinse off any salt residue, especially within a few miles of the ocean.
- Look for chips in the powder coat. Touch up exposed aluminum or steel with paint recommended by the manufacturer before corrosion spreads.
- Inspect the arm elbows and shoulders. Wipe out grit and lubricate pivot points with a dry silicone or PTFE spray if the manual calls for it. Avoid heavy grease, which collects dirt.
- Check that mounting bolts are tight and that brackets have not pulled away from the wall. Rust streaks below a bracket can signal water entering the fastener hole.
- On motorized units, keep the motor end clear of debris and confirm the cable and plug are intact. Never spray water directly into the motor head or a sensor.
- On manual units, check that the crank hook turns smoothly. Stiffness or clicking is a repair item, not a cleaning item; see awning repair.
Do not disassemble the arms. Lateral arms hold powerful springs under tension even when the awning is closed. Releasing an arm or loosening its shoulder can cause serious injury. Leave tension adjustments to a technician.
Seasonal cleaning and inspection schedule
Frequency depends on climate and surroundings. Awnings under trees, near roads, in humid regions or on the coast need more frequent care than one on a sunny wall in a dry climate.
| When | Task | Time needed |
|---|---|---|
| Every 2 to 4 weeks in season | Hose rinse both sides; brush off leaves, pollen, droppings | 10 to 20 minutes |
| Spring (start of season) | Full soap clean; inspect seams, hems, frame and fasteners; test motor or crank | 1 to 3 hours |
| Midsummer | Spot clean sap and droppings; check for mildew spots in shaded areas | 30 minutes |
| Fall (end of season) | Full clean and complete dry-out before retracting for winter | 1 to 3 hours plus drying |
| Every 2 to 3 years, or after a bleach treatment | Re-apply water repellent to acrylic fabric | 1 to 2 hours plus curing |
| Every 2 to 5 years | Professional clean and inspection (optional, useful for large or high units) | Service visit |
The fall clean leads straight into winter preparation. If you store the awning retracted or remove the fabric for winter, follow our guide to winterizing awnings.
Re-treating fabric with a water repellent
Solution-dyed acrylic leaves the mill with a fluoropolymer (fluorochemical) finish that makes water bead and slows soiling. Sun, abrasion and cleaning gradually remove it. When water starts soaking into the fabric instead of beading, or after a bleach treatment, re-treat it.
- Clean and dry completely. The protector must bond to clean fibers. Wait until the fabric is dry throughout, not just on top.
- Choose the right product. Use a fabric guard made for outdoor acrylic and marine canvas. Sunbrella's care instructions recommend a fluoropolymer-based fabric treatment; check the current recommendation from your fabric maker. Do not use silicone waterproofing sprays meant for tents or boots on acrylic unless the maker approves.
- Apply in thin, even coats. Spray in a well-ventilated outdoor area, on a calm day, holding the can or sprayer at the distance on the label. Two thin coats beat one heavy coat.
- Protect surroundings. Cover windows, siding, decking and plants beneath the awning.
- Cure fully. Leave the awning extended and dry for the full curing time on the label, often 24 hours or more, before rolling it up or exposing it to rain.
A re-treatment restores water beading but does not make a woven acrylic fully waterproof, and it will not fix worn seams. If you need true waterproofing, our article on waterproof vs water-resistant awnings explains which fabrics deliver it.
DIY or professional cleaning?
Most homeowners can clean a ground-floor awning in an afternoon for the cost of soap. Professional cleaning, typically about $100 to $400, makes sense for second-storey or hard-to-reach awnings, very large or commercial canopies with graphics, heavy mildew, or when you want a frame inspection and arm adjustment in the same visit.
Worked example
Over 10 years, DIY care for a 12x10 acrylic awning might cost about $10 a year for soap and $30 to $50 every 2 to 3 years for fabric protector, roughly $200 to $250 total. A professional clean every other year at $100 to $400 adds $500 to $2,000 over the same decade. For a reachable single-storey awning, DIY clearly wins. For a second-storey unit, a professional visit is cheap compared with a ladder fall or a torn canopy, since re-covering a residential retractable costs about $500 to $2,000.
Cleaning will not rescue fabric that is brittle, delaminating or torn along seams. When repairs stop making sense, our guide to replacing awning fabric covers measuring and cost. To estimate what a new canopy or awning would cost, try the awning cost calculator.
Frequently asked questions
Can I use a pressure washer on my awning?
No. Even low-pressure settings can strip the water-repellent finish, fray stitching, force water through seams and tear older fabric. Many fabric warranties exclude damage from high-pressure washing. A garden hose with a shower or soft-stream nozzle, a soft brush and mild soap clean every common awning fabric safely and without risking the warranty.
What soap is best for cleaning awning fabric?
A gentle, dye-free liquid dish soap or mild laundry soap works well. Mix about 1/4 cup per gallon of lukewarm water below about 100°F. Avoid degreasers, citrus cleaners, solvent-based products and anything abrasive. Rinse until no suds remain, because soap residue attracts dirt and can feed mildew on the fabric surface.
Can I use bleach on an awning?
Only on fabrics whose maker approves it, mainly solution-dyed acrylic such as Sunbrella. A common mix is 1 cup of bleach and 1/4 cup of mild soap per gallon of water, followed by a very thorough rinse and re-treatment with a water repellent. Do not use bleach on coated polyester, vinyl or printed fabrics, where it can fade dyes and weaken coatings.
How often should I clean my awning?
Rinse it with a hose every 2 to 4 weeks during the season and do a full soap cleaning at least twice a year, in spring and before winter storage. Awnings under trees, near busy roads, in humid climates or close to the ocean benefit from more frequent cleaning. Always let the fabric dry completely before you retract it.
How do I know when to re-treat awning fabric?
Sprinkle water on the fabric. If it beads and rolls off, the finish is working. If it darkens and soaks in, re-treat. Most acrylic awnings need it every 2 to 3 years, and always after a bleach cleaning. Apply a fluoropolymer fabric protector made for outdoor acrylic to clean, completely dry fabric, then let it cure before retracting.
Can I clean my awning while it is retracted?
No. You can only clean fabric you can reach, and a retracted awning hides most of the canopy on the roller. Worse, rinsing a closed awning traps water inside the roll, which leads to mildew and staining. Extend it fully, clean both faces, and keep it open until it is completely dry before rolling it back up.
Sources and further reading
- Sunbrella (Glen Raven): Cleaning and Care instructions for Sunbrella awning and marine fabrics
- Sunbrella (Glen Raven): Sunbrella Fabrics Limited Warranty
- Professional Awning Manufacturers Association (PAMA): homeowner resources on awning care
- U.S. Environmental Protection Agency: A Brief Guide to Mold, Moisture, and Your Home
- Advanced Textiles Association (formerly IFAI): Specialty Fabrics Review articles on awning fabric maintenance
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.