Cleaning Patio and Piazza Furniture in Charleston, SC: Teak, Iron, Wicker and Sling

Outdoor furniture in Charleston cleans up with warm water, a few drops of dish soap or an oxygen-bleach solution, a soft brush and about ten minutes of dwell time - not a pressure washer. The Lowcountry problem is not grit, it is biology: shade plus months of high humidity grow mildew in the weave of sling fabric and down in teak grain, while salt in the harbor air pits wrought iron from the inside out. Force removes neither one. Dwell time and the right cleaner do.

Why does outdoor furniture get dirty so fast here?

Three things stack up. Shade: a piazza or a courtyard under live oaks stays damp for hours after the sun is out, and mildew only needs moisture and shade. Pollen: the oak and pine bloom from late February into April lays down a yellow film that mildew then feeds on. Salt: harbor and marsh air carries chloride inland, and chloride is what turns a hairline scratch in wrought iron into a rust bloom. A set on an open, sunny deck in Mount Pleasant may go a full season looking fine. The same set on a shaded downtown piazza can green up in six to eight weeks.

Can you pressure wash outdoor furniture?

No - on almost everything. A consumer pressure washer starts around 1,500 PSI. Teak fibers separate well below that, leaving a fuzzy raised grain that traps more dirt than it had before. Sling fabric is a vinyl-coated polyester mesh held in the frame by a spline; direct pressure opens the weave and pops the spline out of its channel. Resin wicker cracks at the bends. Powder coat lifts at existing chips and then water travels under the whole panel. Use the pressure washer on the deck or slab underneath, and rinse the furniture itself at garden-hose pressure.

How do you clean each material?

• Teak and other hardwoods. Mild soap and water, scrubbing with the grain using a soft brush. Grey weathering is oxidation, not dirt - no cleaner alone removes it, so that step is a teak cleaner followed by a light sanding.
• Wrought iron. Wash it, then dry it fully the same day. Wire-brush any rust spots and touch them up with a rust-inhibiting primer. Standing water in a joint is what kills iron in this climate, not the wash itself.
• Powder-coated aluminum. Soap and water only. Skip abrasive pads - on the coast a scratch through the coating becomes a corrosion site within a season.
• Resin wicker. Soapy water and a soft brush, rinsing from the top down so runoff carries out of the weave instead of settling into it.
• Sling and mesh. Oxygen bleach (sodium percarbonate), roughly one scoop per gallon of warm water, ten minutes of dwell, then scrub both faces of the mesh and rinse.
• Cushions. Check the tag first. Solution-dyed acrylic covers can usually be washed in place with the same oxygen-bleach mix; removable covers often take a cold machine wash and should always air dry.

What do you do about mildew that keeps coming back?

Mildew regrows from spores left behind in the material, so the job is killing it rather than rinsing it off. Oxygen bleach at a full ten-minute dwell handles most of it. Avoid chlorine bleach on sling and cushions - it degrades polyester stitching thread long before it hurts the fabric itself, and a failed seam is how a chair ends up on the curb. Then deal with the cause: pull furniture eight to twelve inches off a wall so air can move behind it, stand cushions on edge rather than flat when weather is coming, and put risers under feet that sit directly on a damp slab.

Is it worth paying someone to do it?

A full patio set takes roughly one to two hours to do properly by hand. Most Charleston washing crews will not quote furniture as a standalone job, but many will clean a set as an add-on while they are already on the property. If deck and patio cleaning is already on the schedule, ask before the crew starts - the furniture has to be moved either way, and that is half the labor.

Common questions

Can I use a melamine foam eraser on white resin furniture? Yes, and it works well on scuff marks, but it is a fine abrasive. Use it on the marks only, not as a general wash, or you will dull the finish over time.

Should I cover furniture during pollen season? Only with a cover that breathes. A solid vinyl cover on a humid Charleston night traps moisture against the frame and grows more mildew than the pollen ever would have. Use a vented cover, or leave it open and plan on a wash in April.

How often should outdoor furniture be washed in the Lowcountry? Twice a year on an open, sunny deck - once after pollen season and once before winter. Every eight to ten weeks for a shaded piazza or courtyard set. If you are already booking pressure washing in Charleston for the house, pairing the visits saves a trip.