Patio cushions fail from the outside in and from the inside out at the same time. The sun takes the colour and the strength out of the fabric while the foam underneath quietly holds water, and by the end of a couple of seasons the cover looks tired and the core smells of the shed.
What sunlight actually does to the fabric
Ultraviolet light breaks the chemical bonds in dye and in the fibre itself. Both processes run every daylight hour whether anyone is sitting outside or not.
Fading is the visible half. It goes evenly across a panel, so it is hard to notice until a cover is turned over and the underside is obviously a different colour.
The invisible half is worse. The fibre goes brittle, loses tensile strength, and reaches the point where a seam tears under ordinary weight rather than under strain.
That is why an old cover can split when it is simply lifted off a chair. It did not catch on anything. It had lost the strength to hold together.
A chalky powder on the surface of a faded cover is the finish breaking down, and once that starts the fabric is in its last season or two.
Sun also bakes whatever is sitting on the fabric. Sunscreen, insect repellent, food residue and drink spills all set harder under heat and light, and a stain left through one hot summer is usually permanent.
Shade does more for patio cushions than any product does. A cover kept under an awning or brought in between uses outlasts an identical one left out by years, and nothing you wash it with changes that arithmetic.
Solution dyed acrylic and everything else
Two fabrics dominate outdoor seating and they behave completely differently, so find out which one you own before doing anything.
Solution dyed acrylic has the colour added to the fibre while it is still liquid, so the pigment runs all the way through rather than sitting on the outside.
That is why it fades slowly, tolerates a stronger cleaning and can usually handle diluted bleach without losing colour. It is the good stuff and it is worth the care.
Printed or piece dyed polyester has the colour applied to the surface of a finished fabric. It looks identical when new, it fades fast, and strong cleaners strip the print straight off.
The quick test is to look at a cut edge or the inside of a seam. Colour all the way through the yarn means solution dyed. A pale core under a coloured surface means it is not.
Olefin sits in between, holds colour well, and dislikes heat, so it stays away from hot water and hot dryers.
Vinyl and coated fabrics are wiped rather than washed, and they crack if they are folded hard or dried in high heat.
Getting patio cushions ready to wash
Do the dry work outdoors before anything is wet, because grit is what abrades the fabric and it comes off best while it is loose.
Take each one off the furniture and beat it. Dust, pollen, sand and leaf fragments come out in quantity.
Brush the surface with a soft brush and vacuum the seams and piping, where grit packs in and stays.
Look for the zip. Most outdoor cushions have one along the back edge, sometimes under a flap, and getting the cover off is the difference between a straightforward wash and a two day drying problem.
Some patio cushions have no zip at all, and those get surface cleaned rather than washed.
Check the care label sewn into the cover, since outdoor fabric labels are unusually specific and unusually worth reading.
Treat visible marks before the wash. Work a little mild detergent into each one with a soft brush, let it sit fifteen minutes, then rinse.
Zip the cover closed again before it goes in the machine, so the zip does not catch on the drum or on itself.
Washing the covers in a machine
Cold water, gentle cycle, mild detergent in a small dose. That is the whole recipe for most outdoor fabric.
Cold matters. Warm or hot water shrinks these covers, and an outdoor cover is cut to fit a foam block exactly, so a cover that shrinks even slightly will not go back on.
This is the most common way people ruin a set, and it happens in one cycle.
Leave out fabric softener completely. Outdoor fabric is treated to shed water, and softener coats the fibre and cancels that treatment.
Skip chlorine bleach unless the fabric is solution dyed acrylic and the label allows it, in which case a heavily diluted solution is acceptable for stains.
Wash the covers from patio cushions on their own and give them room. Several at once in a packed drum abrade against each other.
Add a rinse. Dense outdoor weave holds detergent, and detergent left in the fabric attracts soil and makes the next season dirtier.
For a stale smell, a cup of white vinegar in the rinse does more than extra detergent, and it does not harm the finish.
The foam core, which does not go in
Outdoor foam is usually open cell and designed to drain, which means it takes in a great deal of water and gives it back slowly.
A machine cannot handle it. Foam holds far too much weight when saturated, it compresses badly under agitation, and a wet core takes days to dry right through.
Foam that is still damp in the middle when the cover goes back on is the actual source of the smell people blame on the fabric.
Clean the core outdoors instead. Hose it down, work a mild soapy solution over it with a soft brush, then rinse it with the hose until the water running out is clear.
Press it between your hands or stand on it gently to force water out, working across the whole block. Do not twist it, which tears the structure.
Stand it on edge on a slope or over a rail so water drains downwards, with air reaching both faces.
Give it a full day at least, longer if the air is damp, and squeeze a corner hard before deciding it is dry. If water appears, it is not.
A cover that is fully dry over a core that is not will smell again in a week, which is why so many people conclude that washing did not work.
Drying, refitting and storing them
Air dry the covers from patio cushions. A hot dryer shrinks outdoor fabric and damages any water repellent finish on it.
If a dryer is the only option, use no heat or the lowest setting and take the cover out while still damp.
Put the cover back on while it is very slightly damp. Outdoor covers are a tight fit and a faintly damp one goes over the foam far more easily than a bone dry one.
Wrap the foam in a plastic bag for the moment of fitting and then pull the bag out, which is an old upholstery trick and it works.
Once fitted, stand the cushion on edge outdoors until everything has finished drying together.
Reapply a fabric water repellent once a year on a clean dry cover. It is the one product worth buying and it works best on fabric that has just been washed.
Store cushions upright in a dry place over the off season, not stacked flat and not in sealed plastic, since anything sealed traps moisture against the foam.
Bringing them under cover during heavy rain and storing them out of direct sun between uses does more for their life than the whole rest of this list.
Common questions about patio cushions
Can patio cushions go in a washing machine whole?
The covers can if they unzip, on cold and gentle. The foam core should not, because it soaks up more water than a drum is built for and takes days to dry through the middle, which is what causes the smell in the first place.
Why did the cover not fit after washing?
Almost always a wash that was too warm. Outdoor covers are cut to the exact size of the foam, so even slight shrinkage makes them impossible to refit. Wash cold, always, and put the cover back on while it is faintly damp.
How do you get rid of a stale smell?
Clean both parts, then dry the foam completely, which takes longer than anyone expects. A cup of white vinegar in the rinse helps the fabric, but the smell is usually coming from a core that never dried.
Is bleach safe on outdoor fabric?
Only on solution dyed acrylic, heavily diluted, and only if the label allows it. On printed or piece dyed polyester it strips the colour, and the damage shows up immediately.
The Mission part
Sun intensity here is the whole story. The season for sitting outside runs across most of the year, the sun is strong through nearly all of it, and outdoor fabric takes far more ultraviolet exposure than it would in a cooler or cloudier place.
That means the fade clock runs faster. A cover that would last five seasons in a cloudier climate may do three here, and the fibre goes brittle on the same schedule. Shade is the single most effective thing available, whether that is an awning, a covered area or simply bringing cushions in.
Heat compounds it. Sustained high temperatures speed up the chemical breakdown that light starts, and they bake anything spilled on the fabric into a permanent mark. Treat spills the day they happen rather than at the end of the season.
Humidity and sudden heavy rain are the other half. Warm damp air means a soaked foam core barely dries on its own, and a cushion left out through a downpour and then closed up under a cover goes stale fast. Stand patio cushions on edge after rain so water drains out rather than sitting in the bottom of the foam, and hard water here is worth countering with a smaller detergent dose and an extra rinse so covers come out soft rather than stiff.
Where a set of covers gets washed at once
Outdoor covers want cold water, a loose drum and a real rinse, and a whole set goes in together when there is room for it.
The machines at our self-service laundry on West Griffin Parkway move far more water through a cycle than a home unit and the drums are large enough that a full set of covers can tumble loose rather than grind against each other, which is what lets a cold rinse carry grit and detergent out of a dense outdoor weave.
Our machines and the store are cleaned daily.
Nou wash-dry-fold service covers the everyday laundry.
For general guidance, The American Cleaning Institute publishes a fabric care guide that is a useful cross-check.
The short version
Patio cushions lose colour and strength to ultraviolet light and go stale because the foam inside them holds water. Find out whether the fabric is solution dyed acrylic, which tolerates a firmer clean, or printed polyester, which does not. Beat and vacuum them dry first, then unzip the covers and wash them cold on a gentle cycle with a small dose of mild detergent, no softener and an extra rinse. Warm water shrinks a cover so it will not refit, which is the usual way a set is ruined. Hose and press the foam core separately and dry it completely, then refit the cover while it is faintly damp and store everything upright and out of the sun.
WaveMAX Mission is at 301 W Griffin Pkwy, easy to reach from Mission and the surrounding area. If you have a load that will not fit at home, call us at 956-271-4735.